Reference · Controls
Controls and fields
Enclosure configuration#
| Field | What it changes | Watch for |
|---|---|---|
| Type | The acoustic arrangement: sealed, vented, passive radiator, bandpass or horn. | Changing the type changes which chamber and port fields are available. Compare the types. |
| Volume | The chamber volume, 0.01–100,000 L. | Net air space, not the outside dimensions of the cabinet. Port volume is handled separately. |
| Tuning | The target resonance of a ported chamber, 15–1,200 Hz. | Typing a tuning holds that frequency and recalculates the port length as geometry changes. |
| Port length | The physical length of the duct. | Typing a length holds that length and recalculates tuning as geometry changes. |
| Shape | Round, slot or a custom cross-sectional area. | Use the actual opening area, especially for a slot. |
| Number of ports | How many identical ports share the air flow. | More total area usually needs longer ports to keep the tuning. |
| End correction | The allowance for moving air beyond the physical ends. | Choose the termination that matches the build. See Ports and end correction. |
| Port model | A lumped resonance or a distributed duct model. | The distributed model includes the duct’s changing response along its length. See Ports and end correction. |
Box volume adjustments contains Driver displacement and Bracing / other. Enter the space occupied inside the cabinet, then check Results for the resulting volumes. A bandpass box has separate chambers; check which chamber a field belongs to.
A sealed box also lets you work from the target system resonance or Q. A passive radiator uses Added mass (tuning), Passive radiator and Number of PRs. Horn geometry lives in the Horn Editor.
Input power#
| Field | Meaning |
|---|---|
| Power › Input power | Sets the drive for this enclosure. For an array in one box it is the total power shared by the drivers. Multiple-entry horns have a power setting per driver entry. |
| Load voltage | The voltage corresponding to the power setting and the effective DC resistance of the wired driver load: V = √(P × R). |
| Series resistance | Resistance between amplifier and driver, such as cable and amplifier output resistance. It changes level and electrical damping. |
| Series capacitor | A physical capacitor in series with the driver load. Its Capacitance and ESR interact with the driver’s impedance. |
| Wiring | The series/parallel arrangement of multiple drivers. Dual voice-coil drivers also have a coil-wiring choice. Check the load before choosing an amplifier. |
Radiation space and distance#
Open Environment to set Radiation space and Listening distance. The space is an idealised boundary condition, not a room simulation.
| Setting | Geometry | Displayed offset from full space |
|---|---|---|
| Full space | No nearby large boundary | 0 dB |
| Half space | One boundary, such as the floor | +6 dB |
| Quarter space | Two boundaries, such as floor and one wall | +12 dB |
| Eighth space | Three boundaries, such as floor and two walls | +18 dB |
Listening distance applies free-field distance attenuation to the sound level. It does not reduce how far the cone moves or how fast the port air moves. A real room adds reflections, cancellations and modes that these controls do not predict.