smaller than optimum box size BLH

pforeman · 15th January 2012, 10:05 PM

I've made open baffle speakers with MJK's H frame woofer crossed over at 250 Hz. No problem with integration at all. I used plate amps for the bass units(with their internal crossovers, and a cap at the input of a single ended triode amp to cut the bass to the full rangers.
I was wondering if you were going to make a Back loaded horn intentionally cutting off the bass at 6dB/ octave at 250 Hz (using stereo bass units), could you make the back loaded horn box smaller, tuning it to help more in the 200-800 Hz region.
Trying to increase the WAF.
Thanks,
Paul

GM · 16th January 2012, 04:31 AM

You could, but it wouldn't sound very good due to all the comb filtering up in a pass-band where we have decent hearing acuity. What you need is a large sealed chamber waveguide.

GM

hm · 17th January 2012, 10:21 AM

Hello,
i made a few satellite horns
crossover most not needed
down to ~100 Hz, 96-102 dB
look measurements, feedback,
plan on my HP
Sat: Horn, Trumpet, Schalmei

15th January 2012, 10:05 PM	#1
pforeman diyAudio Member Join Date: Aug 2008	smaller than optimum box size BLH I've made open baffle speakers with MJK's H frame woofer crossed over at 250 Hz. No problem with integration at all. I used plate amps for the bass units(with their internal crossovers, and a cap at the input of a single ended triode amp to cut the bass to the full rangers. I was wondering if you were going to make a Back loaded horn intentionally cutting off the bass at 6dB/ octave at 250 Hz (using stereo bass units), could you make the back loaded horn box smaller, tuning it to help more in the 200-800 Hz region. Trying to increase the WAF. Thanks, Paul

16th January 2012, 04:31 AM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	You could, but it wouldn't sound very good due to all the comb filtering up in a pass-band where we have decent hearing acuity. What you need is a large sealed chamber waveguide. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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