Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

How high a compression ratio possible in A tapped horn??
How high a compression ratio possible in A tapped horn??
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 27th March 2013, 11:15 PM   #1
rafaro is offline rafaro  Guatemala
diyAudio Member
Join Date: Feb 2006
Location: Guatemala
Default How high a compression ratio possible in A tapped horn??

The Usual recommended compression in a TH is 2:1 but SPL level increases with higher compression. For heavy strong cone drivers has anyone tried to go with 4:1 or higher. Have a low QTs, high Xmax, heavy strong cone but inefficient car driver and was thinking of putting in a 16 foot long TH cab with planned response into the teens.

  Reply With Quote
Old 27th March 2013, 11:36 PM   #2
just a guy is offline just a guy  Canada
diyAudio Member
Join Date: May 2006
There's two issues.

1. A high compression ratio can break the cone. (But I'm sure this has as much to do with the size of the horn as the compression ratio - the mass of the slug of air the cone has to push.)
2. A high compression ratio with a high xmax driver can cause extreme velocity (and possibly turbulence and distortion) in the narrowest parts of the horn.

For the former, all you can do is use common sense and guess what's acceptable. For the latter you can use Akabak to check velocity at any node in the enclosure.

Unfortunately there isn't a single number that describes the safe/unsafe borderline since all cases are different.

Last edited by just a guy; 27th March 2013 at 11:38 PM.
  Reply With Quote
Old 28th March 2013, 12:52 AM   #3
OscarS is offline OscarS  United States
diyAudio Member
Join Date: Jan 2011
I believe I had read (here in this forum) that one could add a small compression chamber in front of the driver that then vents into the tapped horn S2 to attempt to alleviate some of the stress on the cone.

Obviously empirical testing is necessary as I haven't done so myself, but it seems a worthwhile aspect to incorporate. I'm planning on making some high-compression tapped horns for my Cerwin-Vega! Stroker subwoofers that I have here----very low Qts, medium-ish Fs, low Vas, very stiff cone and good Xmax....sounds like a winning combo for tapped horns. Which driver are you thinking of using?
  Reply With Quote


How high a compression ratio possible in A tapped horn??Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
High vs. low compression ratio in horns Defo Multi-Way 65 19th February 2017 05:12 AM
Horn throat velocity (looking at compression ratio from a different perspective) just a guy Subwoofers 32 26th January 2017 11:40 PM
Good brand for compression drivers (i.e. high Q/P ratio) ginetto61 PA Systems 16 3rd November 2011 06:58 PM
Compression ratio and diaphragm size in compression drivers inkasound Multi-Way 50 8th January 2009 04:38 PM
horn with low compression ratio patriz Multi-Way 6 17th May 2006 11:45 PM

New To Site? Need Help?

All times are GMT. The time now is 10:03 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio