Horns · Horn types
Offset-driver horn
How it connects#
The path starts at a closed end. The front of the cone enters at the driver entry position; the back of the cone loads the rear chamber.
The closed section between the end and the entry puts a notch in the response. Designers use it to cancel an unwanted peak above the working band.
When to use it#
Good for#
- Front-loaded designs whose first upper peak needs taming without stuffing.
- Subwoofer horns that would otherwise have a strong resonance just above the band.
Watch for#
- The further the entry sits from the closed end, the lower the notch. Move it too far and the notch lands inside the working band.
- With the rear chamber at 0 L, the back of the cone radiates directly and shows as a Direct radiator output.
What you set#
Set the enclosure type to Horn, then choose Offset-driver 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. |
| Rear chamber | Loading: Sealed or Port, and Volume. At 0 L the back of the cone radiates directly. |
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 closed end, then up to eight spans, each with a Flare, a Length and the Area where it ends. |
| Driver marker | The driver entry position, in cm from the closed end. Switching to this type from a horn whose entry sits at the closed end moves it a fifth of the way along. |
The driver marker can be dragged along the path. The drawing starts at the closed end. How the Horn Editor works.
What the driver entry position does#
Only the driver entry moves. Near the closed end there is no notch below 500 Hz. Further along, a deep notch appears and moves down as the closed section grows, while the bottom of the band extends a little.
- 10 % · 12 cm−3 dB 100 Hz
- 20 % · 24 cm−3 dB 91 Hz
- 35 % · 42 cm−3 dB 85 Hz
Diagnostics and stuffing#
The one horn output is the Main mouth. The Rear port appears when the rear chamber is ported, and a Direct radiator when it is 0 L. Locations include the closed end and both sides of the entry point. Reading the horn diagnostics.
Any span of the horn can be stuffed, including the closed section behind the entry. How stuffing works.
Folding and Hornresp#
- Folding
- Available. The Fold tile keeps the closed end capped. Its Driver entry chip shows where the driver lands on the folded path, and its Hornresp tab gives OD, OD1 or OD2 values and the rear chamber volume.
- Hornresp export · OD, OD1 or OD2
- The driver must enter at S2, S3 or S4. A ported rear chamber is written as Rear Vented, a mapping that has not yet been checked against a native Hornresp capture.
- Checked against Hornresp
- 16 native Hornresp cases of this type are re-simulated in the regression tests. 13 of 13 agreement checks meet their tolerances, and 3 more track stuffing-model differences without claiming agreement.
Try it#
There is no example for this type yet. Open the simulator, add an enclosure, set its type to Horn and choose Offset-driver under Horn type. It starts from the default horn path.
Ask your AI#
Ask your AI
Using 00 Simulator, add an offset-driver horn to my open workspace for the driver I am using now, with a 15 L sealed rear chamber. Try driver entry positions of 10 %, 20 % and 35 % without saving, simulate each at 50 W and show me where the notch lands.
Connect your assistant so it can open your designs.