Horns · Horn types
Multiple-entry horn (MEH)
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.
In the horn card#
The horn card in the enclosure panel lists each path as a row: click one to open that path in the Horn Editor. The card also sets:
| Control | What it sets |
|---|---|
| Throat chamber | Volume, and its Cross-section under Advanced, for D1. |
| Rear chamber | Volume, for D1. It is sealed. |
| D2, D3 … | A row for each extra driver, with its badge and name. It shows the entry’s two chamber volumes and opens to set them. |
| Front chamber and Rear chamber | Inside a driver’s row: that entry’s own chambers. |
| Entry port area (cm²) and Entry port length (cm) | Under the row’s Advanced, beside the Front cross-section: an optional port between the 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. |
In the Horn Editor#
The path itself is set on the Horn Editor tile. Drag it in the drawing, or switch the tile to Table to type each value:
| Control | What it sets |
|---|---|
| Main horn | The area at the throat, then up to eight spans. |
| D2, D3 … markers | Where each extra driver enters, in cm from the throat. |
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.
Try it#
To keep going, open the example in the simulator. It opens with this type already set up, so you can change it and watch the graphs follow.
Ask your AI#
Ask your AI
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.
Connect your assistant so it can open your designs.