Horn type
Multiple-entry horn (MEH)
Several independently amplified drivers share one horn: D1 at the throat and the others entering along the path. Each driver has its own power, EQ, polarity and delay, so the horn can cover a wider band than one driver could.
How it connects
D1 drives the throat. Each further driver, D2 onward, joins the path at its own entry position through its own front chamber and, optionally, an entry port.
All the drivers share the horn’s acoustic load and its one mouth. Where their outputs arrive in step they add; where they do not, the top of the band falls away.
When to use it
Good for
- Wide-band horns where one driver cannot cover the whole range.
- Point-source designs that combine drivers in one mouth.
Watch for
- Entries far from the throat pull the top of the band down. Keep the entry positions short compared with the wavelengths you want the drivers to share.
- Drivers, power and EQ are set in the Drivers panel, not in the horn controls.
What you set
Set the enclosure type to Horn, then choose MEH under Horn type, in the enclosure panel or in the Horn Editor’s path bar. These controls then appear in the horn card:
| Control | What it sets |
|---|---|
| Throat chamber | Volume and Cross-section, for D1. |
| Sealed rear chamber | Volume, for D1. |
| D2 entry position | A percentage of the path from the throat, one for each extra driver. |
| D2 front chamber and D2 rear chamber | Each entry’s own chambers. |
| Entry port area (cm²) and Entry port length (cm) | An optional port between an entry’s front chamber and the horn. |
| Driver, power and EQ for D2… | Opens that driver in the Drivers panel. A horn takes up to eight drivers in total. |
D1 is fixed at the throat. D2 and later markers can be dragged, and clicking one selects that driver. How the Horn Editor works.
What the entry position of d2 and d3 does
Only the entry position of the two extra drivers changes. The bass is the same for all three. Moving the entries from near the throat to a quarter of the way along cuts the top of the band steeply.
- 6 % · 7 cm−3 dB 71 Hz
- 13 % · 15 cm−3 dB 70 Hz
- 25 % · 30 cm−3 dB 70 Hz
Diagnostics and stuffing
The one output is the Main mouth. Each entry with a front chamber cross-section or a port gets its own coupling path in the location list, named after the entry. Reading the horn diagnostics.
Spans can be stuffed in the simulation, but the Hornresp export refuses stuffed MEH designs. How stuffing works.
Folding and Hornresp
- Folding
- Not yet. Folding does not handle multiple driver entries yet, so the Fold into cabinet button is disabled for multiple-entry horns.
- Hornresp export · Throat record plus ME1 and ME2
- Two or three drivers in total, with entries at S2 and, for a third, S3. Amplifier delay, an entry port without a front chamber and stuffing are refused with a reason.
- Checked against Hornresp
- 10 native Hornresp cases of this type are re-simulated in the regression tests. 10 of 10 agreement checks meet their tolerances.
Folding a horn into a cabinet · Exporting to Hornresp
Try it
The example opens with this type already set up, so you can change it and watch the graphs follow.
Open the multiple-entry example
Ask your AI
Hand it to your AI
With 00 Simulator connected to Claude, ChatGPT or another MCP client, your assistant runs this same solver on your own workspaces. Copy the prompt and paste it into a chat.
Using 00 Simulator, open my multiple-entry horn and try moving D2 and D3 to 10 %, 20 % and 30 % of the path without saving. Simulate each and show me SPL, then tell me how far out the entries can go before the top of the band falls away.
- Claude
- In a chat, open the + menu, go to Connectors and switch 00 Simulator on.
- ChatGPT
- In a chat, open the + menu, choose Developer mode and select 00 Simulator.
- Claude Code
- Once the server is added, paste it into any session.