Hey all,
I'd like to make a pair of frugel horns and hope I can get some guidance on which design to go with. Id like to go with the alpair drivers, I have made some pensils with them and like them quite a bit.
I have read that the bass this design family produces is surprising but also that one needs to be realistic with their expectations. Well, I don't know how to interpret all that to guide my choice, and I've had a hard time finding more quantitative statements. Accepting that actual performance will depend on placement, room, etc. can you guys give a rough, quantitative estimate for usable bass frequencies achieved by from the lite vs mk3 vs xl?
Thanks!!
And a bonus question I've wondered about, would making the whole thing out of constrained mass panels give much improvement over quality birch ply?
I'd like to make a pair of frugel horns and hope I can get some guidance on which design to go with. Id like to go with the alpair drivers, I have made some pensils with them and like them quite a bit.
I have read that the bass this design family produces is surprising but also that one needs to be realistic with their expectations. Well, I don't know how to interpret all that to guide my choice, and I've had a hard time finding more quantitative statements. Accepting that actual performance will depend on placement, room, etc. can you guys give a rough, quantitative estimate for usable bass frequencies achieved by from the lite vs mk3 vs xl?
Thanks!!
And a bonus question I've wondered about, would making the whole thing out of constrained mass panels give much improvement over quality birch ply?
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Greets!
Ideally, the 5.3, 7 have > ~0.403 Qts = expanding waveguide (WG) with 11, 12's < ~0.403 = compression horn, but leave Scott, Dave to elaborate further.
IME, depends on how well braced the BB ply construction, i.e. do you want to push its Fs well below (~an octave IME) the driver's passband or above it and since it's easier, lighter to push it above a (sub) woofer's usual passband, it's a 'no-brainer' for me.
That said, there's some audible gains via mass loading* any vibrating device, so recommend a heavy as you can safely lift 'something' perched on top and/or enough multiples to ideally at least match the speaker's weight.
FWIW/YMMV, etc., I used a square edged coin perched on edge and swept a sine wave of LF from 20-500 Hz and as long as it didn't fall over I was good 'enough', all things considered.
From all of this we see that light/well braced construction is the 'hot ticket'. 👍 😎
* http://www.diyaudio.com/forums/atta...d1425434879-curved-small-thor-redux-felt2.jpg
* http://www.diyaudio.com/forums/atta...d1425434879-curved-small-thor-redux-felt3.jpg
Ideally, the 5.3, 7 have > ~0.403 Qts = expanding waveguide (WG) with 11, 12's < ~0.403 = compression horn, but leave Scott, Dave to elaborate further.
IME, depends on how well braced the BB ply construction, i.e. do you want to push its Fs well below (~an octave IME) the driver's passband or above it and since it's easier, lighter to push it above a (sub) woofer's usual passband, it's a 'no-brainer' for me.
That said, there's some audible gains via mass loading* any vibrating device, so recommend a heavy as you can safely lift 'something' perched on top and/or enough multiples to ideally at least match the speaker's weight.
FWIW/YMMV, etc., I used a square edged coin perched on edge and swept a sine wave of LF from 20-500 Hz and as long as it didn't fall over I was good 'enough', all things considered.
From all of this we see that light/well braced construction is the 'hot ticket'. 👍 😎
* http://www.diyaudio.com/forums/atta...d1425434879-curved-small-thor-redux-felt2.jpg
* http://www.diyaudio.com/forums/atta...d1425434879-curved-small-thor-redux-felt3.jpg
