Designing a highbass front horn
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Category: General
Forum Name: Newbie Discussion
Forum Description: Newbie Discussion/Questions. Look less stupid here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=109240
Printed Date: 27 March 2026 at 4:05am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Designing a highbass front horn
Posted By: albanyaka51
Subject: Designing a highbass front horn
Date Posted: 26 September 2025 at 8:48am
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Hi there, sorry if I don't post in the correct location. I'd like to design a horn to play in the 90Hz-400Hz band (maybe a bit higher if possible). This speaker would meet a tapped horn TPAM10HTL at 90Hz. This is for home usage so I don't need a lot of power. Of course a vented enclosure would do the job easily but I like challenges ;-) I played with a 8" driver (B&C 8PE21) in hornsrep and got this result :  I tried to keep the compression ratio low (3:1 here). 3dB bandpass is [92,510], not bad. I have a few questions : - Do you see any evident design mistakes ? - the mouth of the horn is 30cmx30cm. I find it rather low when I compare to equivalent horns. Is is because I used a 8" driver ? - I dont know how to interpret the phase response and the group delay. What do you think ? - Is it useful to look at the impulse response ? What should I aim for ? - If the design is ok, I'd like to try to fold it to reduce the size of the box. Do you think it's possible ? Thank you ! Alban |
Replies:
Posted By: snowflake
Date Posted: 26 September 2025 at 9:23am
| unless you can get your speaker right into the corner of a room it is unlikely to have 0.5pi loading. |
Posted By: albanyaka51
Date Posted: 26 September 2025 at 9:34am
| Good point, I didn't pay much attention to that as I thought going from 1*Pi to 0.5*Pi would only offset the power response 3dB up. Actually it lowers the response around 100Hz. |
Posted By: GEB
Date Posted: 26 September 2025 at 9:39am
| I'm no expert but folding will be a bad idea over 200 Hz. From what I've read a straight horn would be needed if going up that high in the frequency range. |