00 Simulator release history

Version 1.4.0

June 27, 2026

• Redesigned sharing. Shared designs now open in a polished, collapsible design panel showing the author, design notes, outbound links, and one-click exports.
• Draft, edit, and publish your shares. Refine the title, notes, links, and dashboard before going public — and edit published designs anytime.
• New Shared links manager (Account → Shared links) to manage drafts and published designs together, with graph previews and a list or card view.
• Public profiles now showcase your published designs with graph previews.
• Export shared designs straight to WinISD (.wpr), driver records (.wdr), or a native .00sim project — with a clearer picker for which enclosures to include.
• Baffle step compensation. Model front-baffle step diffraction loss with a configurable baffle width, including a baffle layout tile.

Version 1.3.0

June 19, 2026

• Calculate tuning frequency from port length.
• End correction presets, including defaults from WinISD. Thanks to Reddit user xxMalVeauXxx for the end correction discussion.
• Port type: Custom. Set port area directly, rather than just circular or slot ports.
• Graph UI re-design, with glow. Disable from View -> Glow mode.
• Added transfer function magnitude tile.
• Configurable F3/F6/F10 markers on the SPL graph.
• Refined active graph shading and UI.
• Redesigned sidebars for better information hierarchy and less scrolling.
• Create enclosure modal.
• Driver nominal size fixes.
• Performance enhancements.

Version 1.2.5

June 10, 2026

• Revamped filter type controls with clearer crossover family/order choices, including expanded Butterworth, Linkwitz-Riley, and Bessel options.
• Improved the simulator UI with cleaner graph selection, settings, and graph tile controls.
• Added a new Compare graph tile for plotting two chosen metrics together across configurations.

Version 1.2.0

June 8, 2026

• Added custom wiring controls for multi-driver setups, making series/parallel choices explicit.
• Improved the headroom UI with clearer limit, margin, and bottleneck readouts.

Version 1.1.0

June 5, 2026

• New headroom tile shows how much output margin each enclosure has before hitting a physical limit.
• Added F3, F6, and F10 low-frequency limits so rolloff comparisons are clearer at a glance.
• Headroom checks now make it easier to spot excursion, port velocity, amplifier, and passive-radiator constraints.
• Best for quick design triage: compare boxes, find the first bottleneck, then tune the enclosure or power target.
• Thanks to diyaudio/peter-d, diyaudio/andy19191, and diyaudio/grindstone for the push and feedback.

Version 1.0.5

May 31, 2026

Overview

This release adds public profiles and a tiered badge system for signed-in accounts, and brings volume sliders to the enclosure configuration panel for faster what-if sweeps.

New

Public Profiles & Badges

• Public Profile Pages: Accounts now get a shareable public profile at /u/[profileId] showing badges, activity, and shared work
• Badge System: Introduced ten badges across five tiers (Common → Mythic) — including 00-audio, Founding User, Centurion, Reference Design, Breakout Design, Dialed In, Making the Rounds, Contributor, In the Shop, and Published
• Activity Graph: Added a contribution-style activity graph on profile pages for at-a-glance engagement history
• Profile Menu: Header menu now exposes profile navigation and badge visibility from any signed-in workspace

Volume Sliders

• Volume Slider for Every Chamber: Added a slider control under each volume input (main / rear, bandpass front, bandpass-6 rear) so you can sweep enclosure volume without retyping
• Exponential Scale: The slider spans 1 L to 1000 L on an exponential scale for smooth control across small and large enclosures
• Deferred Commit: Drag updates the displayed value continuously and only commits on release, keeping the simulation responsive during sweeps

Thanks

• Thanks to diyaudio/grindstone for repeatedly pushing for a volume slider — the lazy-user UX argument was the right one

Version 1.0.0

May 28, 2026

Overview

This release introduces cloud accounts and workspace management, adds first port resonance readouts, and keeps the existing guest-first simulator workflow intact.

New

Cloud Accounts

• Account Sign-In: Added account support so simulator work can be saved to cloud workspaces
• Guest Upgrade Flow: Fresh accounts can import existing guest simulator data into their first cloud workspace
• Cloud Autosave: Signed-in workspace edits are saved to the account without writing over guest local browser storage

Workspace Management

• Multiple Workspaces: Added account workspace management for creating, opening, importing, and deleting saved simulator workspaces
• Workspace Names: Cloud workspaces now have editable names visible in the simulator header
• Workspace Isolation: Signed-in cloud workspaces stay separated from guest projects and shared-link sessions

First Port Resonance

• Port Resonance Readouts: Added first longitudinal port resonance estimates for vented enclosures and bandpass ports
• Upper-Band Risk Context: Added inline explanation for resonance warnings so port length tradeoffs are easier to evaluate

Improvements

• Account-Aware Sharing: Share links created from signed-in workspaces keep a source workspace reference for account management
• Component Library Foundation: Account workspaces can reuse saved custom drivers and passive radiators across projects
• Cleaner Signed-In Navigation: Added account and workspace navigation from the simulator header

Version 0.8.5

April 22, 2026

Overview

This release adds temporary T/S adjustment sliders for faster what-if analysis, improves numeric input stepping, overhauls the share workflow, expands bandpass graph coverage, and fixes several import issues.

Improvements

New: Temporary T/S Adjust Sliders

• Live T/S Tweaks: Added a T/S adjust sliders mode in the T/S Parameters tile so you can temporarily push parameters up or down and immediately see the effect on the graphs
• Per-Enclosure Temporary Overrides: Adjustments are scoped to the current enclosure workflow and do not overwrite the saved driver model
• Fine-Scrub Ranges: Each supported parameter gets a sensible slider range relative to its current value for quick, small comparative changes

Improved: Numeric Input Step Changes

• Stepper Controls: Numeric inputs now support up/down stepping directly from the inline controls
• Keyboard Shortcuts: You can use Arrow Up / Arrow Down for normal adjustments and Shift + Arrow for larger step changes

Improved: Share Functionality Overhaul

• Share Workflow Refresh: Reworked the sharing flow to better support viewing, importing, and working with shared simulator setups

New: Rear Port Velocity Graph

• BP6 Rear Port Velocity: Added a dedicated rear port velocity graph for 6th-order bandpass enclosures

Bug Fixes

• Project Import Fix: Corrected a bug affecting project imports
• WinISD BP4/BP6 Import Fix: Corrected WinISD import handling for 4th-order and 6th-order bandpass projects

Thanks

• Thanks to diyaudio/grosso.498328 for suggesting the temporary T/S adjustment slider workflow
• Thanks again to diyaudio/grosso.498328 for pushing for faster numeric step adjustments

Version 0.8.1

April 16, 2026

Overview

This release makes net internal volume the single volume model across the simulator, fixes Bits driver list handling, and tightens WinISD import/export volume compatibility.

Improvements

Improved: Net Volume Consistency

• Net Volume Everywhere: Standardized enclosure volume handling so the app now treats box volume as net internal volume throughout the editor and simulation flow
• Clearer Volume Guidance: Added inline volume help text to clarify that entered volume excludes ports, bracing, and driver displacement
• WinISD Volume Alignment: Corrected WinISD import/export volume mapping so exchanged projects use net volume consistently
• Bandpass Volume Consistency: Applied the same net-volume semantics to BP4 and BP6 chamber volumes

Improved: Port Readouts

• Calculated Port Details: Moved calculated port volume into the port section and added calculated port cross-sectional area readouts

Bug Fixes

• Bits Driver List Fix: Corrected issues affecting the Bits driver list so remote driver browsing is more reliable
• T/S Parsing Fix: Corrected raw T/S parsing so RMS power is no longer misread as mechanical resistance (Rms)
• T/S Validation Improvements: Added better validation and review handling for inconsistent derived T/S parameters during import and driver cleanup

Thanks

• Thanks to Reddit user u/Bet_Jazzlike for the report and push toward the net-volume cleanup

Version 0.8.0

April 10, 2026

Overview

This release adds the first bits.00aud.io integration, major upgrades to driver discovery and file import/export, and a broad pass of UI polish across the simulator.

Improvements

New: bits.00aud.io Integration

• Online Driver Library Integration: Connected the simulator to bits.00aud.io so compatible drivers can be browsed and selected directly from the app
• Driver Metadata + Search Support: Added support for enriched remote driver metadata to improve matching, filtering, and selection workflows

New: Enhanced Advanced Driver Search

• Advanced Driver Search Overhaul: Reworked the driver search experience with a denser, more capable search flow for exploring local and online drivers
• Improved Source Handling: Added clearer handling for imports, favourites, and online driver sources within the search experience
• Better Search Performance: Improved responsiveness for large driver libraries with virtualization and more efficient list rendering

New: File Import and Export

• Project File Import/Export: Added project file import/export support for portable simulator projects
• WinISD Import/Export: Added support for importing and exporting WinISD-compatible files

Improved: T/S Parameters Tile

• T/S Parameters Tile Refresh: Improved the T/S parameters tile layout and driver identity presentation for better readability and consistency

New: Air Velocity Warning Level

• Configurable Port Velocity Warning Threshold: Added a configurable warning level for air velocity on the port velocity graph

General UI Enhancements

• Driver Selection UI Polish: Refined driver picker layouts, advanced search presentation, and shared driver identity styling
• Mobile Drawer Navigation Refresh: Replaced the separate mobile Enclosures and Driver buttons with a floating action menu for quick access to Enclosures, Driver, Power, and EQ drawers
• General Interface Improvements: Added a number of visual and usability improvements across the simulator to make workflows faster and cleaner

Bug Fixes

• Graph Frequency Locking Alignment Fixed: Corrected an issue where clicking to lock the graph cursor could land slightly off the intended frequency on the log-scale axis

Version 0.7.5

March 5, 2026

Overview

This release promotes both 4th-order and 6th-order bandpass alignments into the enclosure type selector as beta-ready options.

Improvements

New: Bandpass Alignments (Beta)

• 4th and 6th Order Bandpass Enabled: Both alignments are now available in the enclosure type dropdown - in beta for now

Bug Fixes

• Auto-Hide Behavior Fixed: Resolved an issue where auto-hide behavior could get stuck or trigger unexpectedly in sidebar interactions
• Impedance/Fb Alignment Fixed: Corrected an issue where the low impedance point did not align with enclosure tuning frequency (Fb)

Version 0.7.2

March 4, 2026

Overview

This release adds at-a-glance enclosure badges in the left sidebar so design comparisons are faster without opening each enclosure.

Improvements

Enclosure Sidebar Quick Stats

Suggested by diyaudio/grindstone

• Per-Enclosure Chips: Added compact chips for box volume, input power, and alignment frequency directly in each enclosure row
• Type-Aware Frequency Display: Frequency chip reflects the correct value for sealed, vented, and passive radiator alignments
• Power Load Tints: Power chip now uses green/yellow/orange/red tinting based on applied power level

Version 0.7.1

March 4, 2026

Overview

This release improves component creation flow and sidebar usability. You can now paste raw datasheet text to extract T/S parameters, and desktop sidebar auto-hide behavior has been removed to reduce confusion.

New Features

Raw Text T/S Parameter Paste

Suggested by diyaudio/grindstone

• Paste From Any Datasheet: In Create Driver flow, choose "Paste raw T/S params" and paste unstructured text

Improvements

Sidebar Behavior

• Removed Auto-Hide Pin/Unpin Controls: Pin/unpin actions were removed from sidebars to simplify behavior

Version 0.7.0

February 2, 2026

Overview

A major feature release focused on advanced EQ/DSP tools, enhanced simulation metrics, and improved configuration flexibility. This release adds Linkwitz Transform and shelf EQ options, group delay visualization, per-configuration power levels, and configurable warning thresholds.

New Features

Linkwitz Transform EQ

• Low Frequency Extension: Use the Linkwitz Transform to electronically extend the bass response of sealed enclosures
• Configurable Parameters: Set source F₀/Q₀ (your sealed system's Fc/Qtc) and target Fp/Qp
• Visual Feedback: See the transform's effect on the SPL response in the EQ overlay

High/Low Shelf EQ

• Low Shelf: Boost or cut frequencies below a shelf frequency
• High Shelf: Boost or cut frequencies above a shelf frequency
• Simple Controls: Just frequency and gain - no Q to worry about

Group Delay Graph

• New Visualization: See group delay (in milliseconds) across the frequency range
• Phase-Derived: Calculated from the derivative of the phase response
• Auto-Scaling: Graph automatically scales to show the full delay range

Reference Efficiency Display

• η₀ Calculation: Reference efficiency now displayed in the Driver Specs panel
• Sensitivity Conversion: Shows equivalent 1W/1m sensitivity in dB
• Calculated from T/S: Derived from Fs, Vas, and Qes per standard formulas

Per-Configuration Power Levels

• No more global power levels - set per enclosure

Configurable Warning Thresholds

• Port Velocity Warning: Adjust the port velocity warning threshold (default 17 m/s)
• Xmax Reference Lines: Toggle visibility of Xmax reference lines on excursion graphs
• Persistent Settings: Preferences saved to local storage

Xmech/Xdamage Support

• Extended Excursion Limits: Drivers can now specify Xmech (mechanical limit) and Xdamage (damage threshold) in addition to Xmax
• Visual Reference Lines: When defined, Xmech and Xdamage appear as additional reference lines on the excursion graph
• Color-Coded: Different line styles distinguish Xmax (dashed), Xmech (dotted amber), and Xdamage (red)

Improvements

EQ Editor Enhancements

• Added dropdown options for Linkwitz Transform, High Shelf, and Low Shelf filters
• Improved UI for Linkwitz Transform with source/target parameter groupings
• Better labeling of frequency field based on filter type (Cutoff, Center, Shelf)

Driver Specs Panel

• New Efficiency section showing η₀ and calculated sensitivity
• Support for displaying Xmech and Xdamage when available

Version 0.6.3

January 28, 2026

Overview

This release adds full support for importing Unibox database files (.xlsx), allowing you to import complete enclosure designs with their associated drivers and passive radiators.

New Features

Import from Unibox Database

Suggested by diyaudio/pallas.16600

• Full Enclosure Import: Import complete enclosure designs from Unibox spreadsheets, not just drivers
• Multi-Type Selection: Each Unibox row can contain multiple enclosure configurations (sealed, vented, PR, bandpass) - select which ones to import
• Automatic Detection: Sheet detection identifies Unibox data based on T/S parameter headers or "UniBox Design Data Base" markers
• Passive Radiator Support: PRs are now detected and imported from the PRName, Fsp, Mmp, Qmp, Sdp, Xpmax columns
• Bandpass Warning: Bandpass enclosures are marked as unsupported (not yet simulated) but drivers can still be imported
• Parameter Validation: T/S parameters are validated with warnings for missing or inconsistent values
• Unit Conversion: Automatic conversion from Unibox units (cm², L, mm, mH) to SI units (m², m³, m, H)
• Derived Parameters: Calculates Qts, Bl, Mms, Cms, Rms from available data when not directly provided

Import Flow

1. Select Unibox file (.xlsx)
2. Choose sheet (auto-detected if possible)
3. Review enclosures, drivers, and PRs in tabbed view
4. Select which enclosure types to import per row
5. Import creates enclosures pre-configured with their drivers

Technical Details

• Enclosure type selection uses clickable chips with indicator dots
• Selecting an enclosure auto-selects its required driver (and PR for passive radiator enclosures)
• Batch import handles color assignment correctly across multiple enclosures
• Import dropdown in Component Library offers choice between WinISD (.wdr) and Unibox (.xlsx) formats

Version 0.6.2

January 28, 2026

Overview

This release adds support for dual voice coil (DVC) drivers with configurable series/parallel wiring options, allowing accurate simulation of popular DVC subwoofers like the Dayton Audio Ultimax series.

New Features

Dual Voice Coil (DVC) Support

Suggested by r/Slurp6773

• Automatic DVC Detection: Drivers with multiple voice coils (numVC > 1) are automatically detected from WDR files
• Wiring Configuration: When a DVC driver is selected, choose between series and parallel wiring in the driver configuration panel
• Effective Impedance Display: See the calculated effective impedance (Re) based on your wiring choice
  • Series wiring: Uses the stored/datasheet Re value unchanged
  • Parallel wiring: Re ÷ numVC² (e.g., 4.3Ω series → 1.075Ω parallel for 2 coils)
• Accurate Simulation: The simulation uses effective Re and Le values for all calculations, including SPL, excursion, impedance, and power handling

Driver Form Improvements

• Voice Coil Count: Added "Voice Coils" field to the driver parameters editor for creating custom DVC drivers
• Renamed Button: "Edit T/S" button renamed to "Edit" for clarity since the editor handles more than just T/S parameters

Bug Fixes

• Fixed issue where editing voice coil count and saving would not persist the change
• Driver edit form now properly reinitializes when reopened with updated driver data

Technical Details

• Wiring configuration is stored per-configuration, allowing comparison of the same DVC driver with different wirings
• Driver T/S parameters (Re, Le, Bl) are stored as series-connected values (the default/datasheet configuration)
• Series wiring: Uses stored values unchanged
• Parallel wiring (conversion from series):
  • Re = Re_series ÷ numVC² (e.g., 4.3Ω → 1.075Ω for 2 coils)
  • Le = Le_series ÷ numVC²
  • Bl = Bl_series ÷ numVC
• For the same input power, both wiring configurations produce equivalent acoustic output (verified against WinISD)
• Default wiring is series when not specified
• Share links now include voice coil wiring settings

Version 0.6.1

January 28, 2026

Overview

This release adds customizable graph colors and improved configuration switching from the graph legend, making it easier to manage and identify multiple driver configurations.

New Features

Customizable Graph Colors

• Color Picker: Click on the color dot next to any driver configuration (in the graph legend or driver configuration panel) to open a color picker
• Preset Palette: Choose from 25 visually coherent preset colors organized by color family (blues, greens, warm tones, reds/pinks, and purples)
• Consistent Styling: Colors are designed to look great on both light and dark themes

Interactive Graph Legend

• Switch Configurations: Click on any legend item to switch to that driver configuration
• Active Indicator: The currently selected configuration is highlighted with bolder text and a subtle background
• Helpful Tooltips: Hover over legend items to see the full driver name and "Click to select" hint

User Experience Improvements

• Color changes are persisted automatically and sync across all graphs
• Switching configurations from the legend also updates the enclosure and driver configuration panels
• Visual feedback when hovering over clickable legend items

Version 0.6.0

January 27, 2026

Overview

Enclosure limits have been made much more generous so sub-liter enclosures, small ports, and very large systems (e.g. multi-driver arrays) are supported. Graph Y-axis controls have been added for manual or auto-scaling of each graph.

Changes

• Box volume: Minimum reduced from 1 L to 0.01 L (10 mL); maximum increased from 1,000 L to 100,000 L.
• Port diameter/width and height: Minimum reduced from 25 mm to 1 mm; maximum increased from 500 mm to 10,000 mm.
• Driver displacement and bracing: Maximum increased from 50 L to 1,000 L.
• Effective volume floor: Lowered so sub-liter effective volumes are allowed while still avoiding zero/negative values.
• Sealed box Qtc: Now displays system Q factor (Qtc) for sealed enclosures, helping users understand damping characteristics (overdamped, critically damped, underdamped).
• Graph Y-axis settings: Each graph now has a settings cog that allows switching between Auto (lenient bounds-checking that adjusts to data) and Manual mode (user-defined min/max range). Settings are persisted per graph in local storage.
• Improved auto-scaling: Auto mode uses lenient thresholds to avoid jarring visual changes while still adapting when data approaches limits. SPL graphs have a 70dB lower limit in auto mode to avoid showing deep bass roll-off.
• Dynamic axis labels: Y-axis labels now always cover the full range, including when custom manual bounds are set.
• Checkbox visibility: Improved contrast of unchecked checkboxes in light mode.
• EQ panel redesign: Unified filter list with single "Add Filter" dropdown. High-pass, low-pass, and parametric EQ filters now share one compact list instead of separate category cards.
• Advanced power options: New "Advanced" panel in the bottom bar exposes series resistance (cable/amp output resistance, default 0.1Ω) and displays calculated driver voltage based on power and DC resistance (Re).
• Results moved to sidebar: Simulation results (F3, F10, Max SPL, sensitivity, excursion, etc.) are now in a collapsible "Results" accordion in the right panel instead of the bottom bar.
• Driver count limit increased: Maximum drivers per enclosure raised from 10 to 50 to support large multi-driver arrays.

Credits

• Crispy_Bearcon (Reddit) — Supporting small box volumes (e.g. 0.5–1 L) and port dimensions below 25 mm for tiny speakers.
• Antony Stubbs — Supporting box volumes above 1,000 L and driver counts above 10 for array / large-system comparison.
• ultraganymede (Reddit) — Suggesting Qtc display for sealed enclosures.
• mosquito.109881 (diyAudio) — Suggesting editable graph axes.
• Crispy_Bearcon (Reddit) — Suggesting checkbox visibility improvements in light mode.

Version 0.5.3

January 22, 2026

Overview

This release includes UI improvements and space optimization for better workflow efficiency.

Improvements

Panel Layout Optimization 🎨

• Panel Swap: Swapped enclosure configuration and radiation space panels for better workflow (credit: diyaudio/grindstone.66292)
• Space Optimization: Removed unnecessary UI elements (sliders, redundant labels) and condensed controls for more efficient use of space
• Consistent Headers: Unified header styling across all panes with titles and action buttons in consistent locations

Enclosure List Enhancements 📋

• Enclosure Count Badge: Added count chip next to "Enclosures" title showing total number of enclosures
• Collapsed State Indicators: Colored dots now appear next to collapsed enclosure items, representing visible driver configurations
• Subtext Display: Enclosure configuration panel now shows subtext (e.g., "VENTED · 37L · 40Hz") for quick reference

Port Configuration Improvements 🔧

• Improved Layout: Port configuration section redesigned for better readability with clearer spacing and organization
• Better Labels: More descriptive labels and separated controls for easier understanding

Driver Configuration Updates 🎵

• Streamlined Interface: Driver configuration moved out of accordion for direct access
• Visual Indicators: Driver name and color dot displayed in configuration header
• Simplified Controls: Removed redundant elements and improved button placement

Version 0.5.2

January 22, 2026

Overview

This release focuses on UX improvements and interface polish, making key features more discoverable and reducing clutter for regular users.

Improvements

T/S Parameter Input Optimization 📝

• Required Parameters First: T/S parameter input form now shows required parameters (Re, Fs, Qts, Vas, Znom) at the top, making it easier to enter essential values first
• Better Organization: Optional parameters are grouped logically below required ones, improving the data entry workflow

Interface Discoverability 🔍

• Always Visible Context Menus: Three-dot context menus on enclosure and configuration items are now always visible, not just on hover, making actions more discoverable
• Cleaner Graph Selector: Debug graphs are now hidden from the graph selector unless debug mode is enabled, reducing clutter for regular users

Enclosure Configuration Switching 🎯

• Full Card Clickability: The entire enclosure card is now clickable for selection, making it easier to switch between enclosures
• Eye Icons for Visibility: Replaced checkboxes with eye icons (open/closed) next to driver configurations for more intuitive visibility toggling
• Double-Click to Rename: Enclosure names now require double-click to edit, preventing accidental edits when selecting enclosures
• Smart Context Menus: Kebab menus (three-dot menus) on enclosures and driver configurations now only appear when the item is selected or hovered, reducing visual clutter
• Hover Feedback: Added subtle background color changes on hover to make interactive elements more discoverable
• Rename Tooltip: Added a helpful tooltip that appears after hovering over an enclosure name for 1 second, indicating "Double click to rename"

Version 0.5.1

January 22, 2026

Overview

This release includes navigation improvements and UI enhancements to make key features more discoverable.

Improvements

Navigation & Menu Structure 🧭

• Driver Management in Header: Moved driver management button directly to the main header for better visibility and accessibility
• Info Dropdown Menu: Consolidated About, Roadmap, and Changelog links into a single "Info" dropdown menu in the header
• Settings Reorganization: Moved theme toggle (Light/Dark mode) into the Settings menu for better organization
• Share Button: Simplified "Share Config" label to just "Share" for cleaner UI

Version 0.5.0

January 14, 2026

Overview

This release focuses on graph usability improvements, performance optimizations, and UI enhancements based on community feedback.

New Features

Graph Screen Space Optimization 📊

• Removed Unnecessary Padding: Eliminated excessive padding and card wrappers around graphs to maximize screen real estate
• Compact Layout: Graphs now use space more efficiently, allowing more data to be visible at once

Frequency Locking 🔒

• Click to Lock: Click anywhere on a graph to lock the cursor at that frequency
• Visual Indicator: Locked frequency is clearly indicated with a lock icon and Hz value
• Remember Position: When the mouse leaves the graph, the cursor position is remembered and remains visible
• Easy Unlock: Click the 'X' button to unlock and return to free cursor movement
• Works in All Views: Frequency locking is available in both compact and expanded graph views

Improved Graph Legend 📈

• Integrated Live Values: Replaced floating tooltips with integrated legend display
• Always Visible: Legend shows live values at all times, reducing visual clutter
• Better Performance: Removed tooltip hover calculations that were causing lag
• Compact Mode: Two-column layout in compact mode, expanding to more columns when space allows

EQ Editing Improvements 🎛️

• Per-Graph EQ Editing: EQ edit mode now applies only to the selected graph, not all graphs
• Context Menu Control: EQ context menus (for adding filters and parametric EQ) only appear when in EQ edit mode
• Clearer State: EQ button shows on all graphs that support EQ, making it clear which graphs can have EQ applied

Max SPL Graph Enhancements 🔊

• Thermal and Mechanical Limits Toggle: Added "Limits" button to show thermal and Xmax (mechanical) limits
• Limit Visualization: Displays the non-constraining limit as a dashed line (e.g., if mechanical is limiting, shows thermal limit as dotted)
• Detailed Legend Information: When limits are enabled, legend shows:
  • Thermal limit (THERM) with dashed line indicator
  • Xmax limit (XMAX) with dashed line indicator
  • Excursion: X/Ymm (Z%) format showing excursion at limit vs driver Xmax
  • Power: X/Y W (Z%) format showing power at limit vs driver Pe
• All limit information updates dynamically as you hover or lock the cursor at different frequencies

Improvements

Performance ⚡

• Faster Animations: Graph animations now run 2.5x faster for more responsive interactions
• Optimized Rendering: Improved graph rendering performance, especially in compact mode
• Reduced Re-renders: Better memoization and state management to prevent unnecessary re-renders

Visual Enhancements 🎨

• Dark Mode Graph Lines: Improved grid line visibility in dark mode for better readability
• Input Power Visibility: Power input moved to a pinned bottom bar with improved visibility and better alignment
• Better Contrast: Enhanced visual contrast across all graph elements

Bug Fixes

• Fixed React Render Error: Resolved "Cannot update a component while rendering a different component" error in EQ overlay system by deferring state updates to avoid render-phase updates

Version 0.4.0

January 13, 2026

Overview

Major release bringing passive radiator support, link sharing, and significant bug fixes for multi-driver configurations.

New Features

Passive Radiator Enclosures 🔊

A new enclosure type! Passive radiators (PRs) offer an alternative to ported designs with some unique advantages:

• PR Support: Select "PR" as an enclosure type and choose from the passive radiator database
• Multiple PRs: Configure multiple passive radiators per enclosure with combined parameters
• PR Excursion Graph: Dedicated graph showing passive radiator excursion limits
• Accurate Simulation: Full acoustic impedance modeling of the PR mechanical system

Passive radiators can achieve lower tuning frequencies than ports in compact enclosures, and eliminate port noise issues.

Link Sharing 🔗

Share your enclosure designs with others:

• Create Share Links: Click "Share Link" to generate a shareable URL
• Select What to Share: Choose which enclosures, driver configurations, and graphs to include
• Customizable Notes: Add a name and description that recipients will see
• Import Shared Designs: Open shared links and import configurations to your own simulator
• Human-Readable URLs: Share links include driver and enclosure info for easy identification

Bug Fixes

Multiple Driver Simulation 🔧

Fixed simulation calculations for multiple identical drivers:

• Corrected acoustic coupling calculations (was showing N² over-coupling error)
• Share page now uses the same simulation approach as the main page
• Proper power distribution per driver in network solver

Improvements

UI/UX Enhancements ✨

• Context Menus: Enclosures and driver configurations now have a 3-dot menu on hover with Rename, Duplicate, and Delete options
• Sealed Box Fsc: System resonance frequency (Fsc) now displayed for sealed enclosures
• Independent Panel Scrolling: Left and right panels now scroll independently from the central graphs
• Graph State Persistence: Selected graphs and expanded/collapsed state now persist across page refreshes
• Improved Share Page Layout: Better organization with notes, power input, and simulation summary
• Error Handling: Graceful error states on share pages with helpful messages

Version 0.3.3

January 13, 2026

Overview

This release adds effective enclosure volume calculation

Effective Enclosure Volume Calculation

Thanks to gnkaudio for the suggestion!

Account for internal volume losses to get more accurate simulations:

• Volume Adjustments panel: Expandable section below Box Volume to configure displacement
• Driver displacement: Enter the volume displaced by driver(s) inside the enclosure
• Port volume: Automatically calculated based on port dimensions (vented enclosures)
• Bracing/other: Enter additional volume for bracing, handles, or other internal items
• Effective volume display: Shows the net volume used for simulation with displacement %
• Toggle on/off: Enable when you want accurate results, disable for quick estimates
• Works for all enclosure types: Both sealed and vented simulations use effective volume

Technical Details

Effective Volume Calculation

When enabled, the simulator automatically subtracts:

• Driver displacement (volume taken up by the driver inside the box)
• Port volume (internal space occupied by the port tube)
• Additional displacement (bracing, handles, or other internal components)

The resulting effective volume is used for all simulation calculations.

Version 0.3.2

January 12, 2026

Overview

This release adds imperial unit support, significantly improves the user experience when entering Thiele-Small parameters, and increases limits for longer ports and higher tuning frequencies.

New Features

Imperial Units Support

Thanks to r/Mr-BPM for the suggestion!

• Settings cog: New settings button in the header to switch between metric and imperial units
• Volume unit toggle: Click the unit next to Box Volume to cycle through L → cm³ → m³ → ft³
• Length unit toggle: Click units next to port dimensions to cycle through mm → cm → in
• Persistent settings: Your unit preferences are saved and restored on next visit
• Note: Excursion values always display in mm for precision

Enhanced T/S Parameter Input

Thanks to Ron E @ DiyAudio for the suggestion!

• Text-based inputs: Switched from number inputs to text inputs with decimal keyboard support, allowing easier entry of scientific notation (e.g., 3.9e-4) and precise values
• Inline validation: Real-time validation with error messages displayed next to each field
• 2-column layout: More compact form layout fits more parameters on screen without scrolling
• Improved tabbing: Unit toggle buttons no longer interrupt tab navigation between fields
• Scientific notation in tooltips: Parameter descriptions now display proper subscripts and symbols

Smarter Auto-Derivation

• Multi-pass derivation: The derivation engine now runs multiple passes to resolve complex dependency chains
• New derivation: Cms from Vas + Sd: Can now derive compliance from equivalent volume and radiating area
• Cascading calculations: Enter Vas, Sd, Fs, Qms, Qes, and Re to automatically derive Cms, Mms, Qts, Bl, and Rms
• Bidirectional clearing: Changing a derived parameter (like Sd) now clears related fields (like Dd) so they can re-derive

Improvements

Increased Limits

• Tuning frequency: Increased max from 100Hz to 200Hz for midrange and smaller enclosures
• Port dimensions: Increased port diameter/width limit from 300mm to 500mm to allow for longer calculated port lengths up to ~1m

Better Form Layout

• Compact parameter sections: Electrical, Mechanical, Q Factors, and Physical parameters organized in grid layouts
• Inline labels: Labels positioned to the left of inputs for a cleaner look
• Consistent styling: Brand, Model, and Notes fields now match the parameter input styling

Technical Details

The derivation system now supports the following calculation chains:

• Q factors: Qts ↔ Qms + Qes (any two derives the third)
• Geometry: Sd ↔ Dd (diameter to area and vice versa)
• Compliance: Cms from Vas + Sd, or from Fs + Mms
• Mass: Mms from Fs + Cms
• Motor: Bl from Re + Qes + Mms + Fs
• Damping: Rms from Qms + Mms + Fs

This allows users to enter commonly available specifications and have the simulator automatically calculate the remaining parameters needed for accurate simulation.

Version 0.3.1

January 11, 2026

Overview

This release adds support for multiple identical drivers in a single enclosure configuration, allowing users to simulate dual subwoofers and other multi-driver setups.

New Features

Multiple Driver Support

• Multiple Identical Drivers: Configure any number of the same driver (1-10) in a single enclosure
• Automatic Parameter Combination: The simulator automatically combines driver parameters:
  • Total radiating area (Sd) scales with driver count
  • Total power handling (Pe) scales with driver count
  • Parallel resistance (Re) calculated correctly for multiple drivers
  • SPL increases by +6dB per doubling (coherent addition)
• Simple UI: Select a driver and specify the number of drivers with a single input field
• Combined Specs Display: View combined driver specifications in the configuration panel

Technical Details

When multiple identical drivers are configured:

• Sd (radiating area): Multiplied by driver count
• Pe (power handling): Multiplied by driver count
• Re (DC resistance): Divided by driver count (parallel connection)
• Vd (volume displacement): Multiplied by driver count
• All other T/S parameters remain unchanged (same driver)

This allows accurate simulation of dual subwoofer setups, multi-driver arrays, and other configurations where multiple identical drivers share the same enclosure.

Version 0.3.0

January 11, 2026

Overview

This release adds filter and parametric EQ support, manual T/S parameter editing, and various simulation improvements.

New Features

Filters & Parametric EQ

Requested by @gnkaudio

• High-Pass and Low-Pass Filters: Butterworth and Linkwitz-Riley options at 12dB/oct and 24dB/oct slopes
• Parametric EQ: Add boost or cut at specific frequencies with adjustable Q factor
• Graph Integration: Filters and PEQs are displayed directly on the SPL graph with interactive handles
• Right-Click to Add: Right-click anywhere on the SPL graph to add a filter or PEQ at that frequency
• Drag to Adjust: Drag filter handles to change frequency, drag PEQ handles to adjust frequency and gain, drag Q handles to adjust bandwidth

Manual T/S Parameter Editing

Requested by r/hedekar

• Edit Driver Parameters: Modify any Thiele-Small parameter for custom drivers or to match measured values
• Direct Input: Enter exact values for Fs, Qts, Vas, Xmax, and other parameters

Simulation Improvements

• Filters now correctly affect excursion, port velocity, and SPL calculations
• Max SPL graph remains unaffected by filters (shows true system capability)
• Fixed SPL calculation accuracy (was reading ~3dB high)
• Frequency axis capped at 400Hz across all graphs for better focus on subwoofer range

UI Improvements

• EQ edit mode toggle on SPL graph header
• Delete buttons on filter and PEQ popups for quick removal
• Improved tooltip display for Max SPL showing limiting factor (mechanical vs thermal)

Version 0.2.1

January 9, 2026

Overview

This release adds light mode support, providing a comfortable viewing experience for users who prefer lighter color schemes.

New Features

Light Mode / Dark Mode Toggle

• Theme Switching: Toggle between light and dark modes with a single click
• Theme-Aware Colors:
  • Dark Mode: Electric Lime (#F1FF28) accent color (original branding)
  • Light Mode: Deep Blue (#2563eb) accent color for optimal contrast and visibility
• Theme-Aware Logos: Automatically switches between black and white logos based on theme
• Persistent Preference: Theme selection is saved and persists across sessions
• System Integration: Respects system theme preference by default
• Requested by r/Sangeet-Berlin

UI Improvements

• Updated scrollbar styling to be theme-aware
• Grid backgrounds and glow effects adapt to theme
• All components seamlessly transition between light and dark modes

Technical Improvements

• Integrated next-themes for robust theme management
• Theme toggle available on all pages (main, about, roadmap, changelog)
• Proper hydration handling to prevent theme flash on page load

Version 0.2.0

January 9, 2026

Overview

This release adds powerful new features for advanced enclosure design, including maximum SPL analysis, flexible port configurations, and improved graph management.

New Features

Max SPL Graph

• Mechanical and Thermal Limits: Visualize the maximum achievable SPL at each frequency, showing both mechanical (excursion-limited) and thermal (power-limited) constraints
• Three Curves:
  • Max SPL (the limiting factor - minimum of mechanical and thermal)
  • Mechanical limit (SPL when excursion reaches Xmax)
  • Thermal limit (SPL at rated power Pe)
• Requested by @gnkaudio

Multiple Ports and Port Dimensions

• Multiple Ports: Configure 1-10 ports per enclosure for complex designs
• Port Shapes:
  • Circular ports: Traditional round ports with diameter control
  • Slot ports: Rectangular/slot ports with independent width and height
• Accurate Calculations: Proper handling of port area, end corrections, and acoustic mass for all port configurations
• Requested by @gnkaudio

Resizable Graphs

• Expand/Contract Controls: Toggle individual graphs between 1 and 2 columns
• Smart Auto-Sizing:
  • Single graph automatically expands to full width (2 columns)
  • Multiple graphs start at 1 column each
  • Independent control per graph when multiple are displayed
• Better Comparison: Optimize your workspace for comparing different metrics

Technical Improvements

• Enhanced port calculation logic for rectangular ports using hydraulic diameter
• Improved end correction calculations for multi-port systems
• More accurate max SPL calculations considering both mechanical and thermal limits

Bug Fixes

• Fixed Max SPL graph axes and legend formatting to match SPL graph style
• Improved port parameter calculations for non-circular ports

Version 0.1.0

January 9, 2026

Initial release: Enclosure Simulator, a browser-based loudspeaker enclosure design tool.

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Features

Enclosure Simulation

• Sealed and vented (bass reflex) enclosures
• Real-time frequency response (SPL)
• Cone excursion modelling
• Port air velocity modelling

Graphs available:

• SPL
• Cone excursion
• Port velocity
• Cone velocity
• Port volume velocity
• Phase
• Impedance (electrical)

Driver Management

• Built-in library (85+ drivers across major manufacturers)
• Import WinISD .wdr files
• Search and filtering by key parameters (size, impedance, Fs, Qts, Vas, power, brand/model)

Comparison Workflow

• Multiple enclosures side-by-side
• Multiple driver configurations per enclosure
• Per-configuration visibility toggles
• Color-coded plots and grouped legend

Enclosure Configuration

• Box volume control (1–1000 L)
• Vented tuning frequency control (15–100 Hz)
• Port modelling:
  • Diameter control (25–300 mm)
  • Automatic port length calculation
  • End correction settings
  • Multiple ports support

Simulation Environment

• Input power control (0.1 W–10 kW)
• Radiation space selection:
  • Full space (4π)
  • Half space (2π, default)
  • Quarter space (π)
  • Eighth space (π/2)

UI

• Responsive layout (desktop, tablet, mobile)
• Collapsible left and right sidebars with resize on desktop
• Multi-graph selection and two-column graph grid

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Technical notes

Uses a lumped-parameter electro-mechanical-acoustic network model intended for low-frequency enclosure design (sealed and bass reflex).

Not intended for horns, complex geometries, or non-linear behaviour modelling.