BMS 4591 midrange
Looking at the 4591 distortion graphs, what would explain the two narrow peaks at 3kHz, both 2nd and 3rd harmonic?
And Scott, are you able to tell or guess the length of the throat conduit? I like the way the throat in modern compression drivers is much shorter than their predecessors: non-existent would be ideal, so the horn builder has full control over the horn flare, starting from the phase plug. With the 4591 being 90mm deep, I am slightly concerned that it has a long throat conduit.
Thanks for introducing this driver to the forum. Grant
Looking at the 4591 distortion graphs, what would explain the two narrow peaks at 3kHz, both 2nd and 3rd harmonic?
And Scott, are you able to tell or guess the length of the throat conduit? I like the way the throat in modern compression drivers is much shorter than their predecessors: non-existent would be ideal, so the horn builder has full control over the horn flare, starting from the phase plug. With the 4591 being 90mm deep, I am slightly concerned that it has a long throat conduit.
Thanks for introducing this driver to the forum. Grant
Community M4
Russian Blue,
I think the Community M4 is an impressive design, but not optimized for home use. Designed for max dB, think NASCAR events or tractor pulls, it was to be heard and remain intelligible at long distances, thereby eliminating numerous lower output arrays. At almost 140dB full power, the thing can almost stop your heart.
I own the Community M200, which is a shallow 2" design with the phase plug very near the exit, mylar diaphragm, fairly flat from 400 to 3500 Hz approx. with more ragged extension to 8K Hz. Nice sounding driver on the Community horn made for it.
Their new VHF 1" driver looks very good. You may want to give them a call for their take on the best home use gear.
Aside from some of the more exotic Japanese designs mentioned, it will be difficult to find a compression driver that is affordable, has bandwidth down to 200 - 300 Hz, and still sounds good there. The 1.4" and 2" drivers I've heard sound pretty bad near resonance. Most horn people would agree that horn loading a 12" woofer is the least expensive way to provide good coverage in the midbass and still manage good integration to a mid/high horn.
In any case, good luck in your quest.
Tim
Russian Blue,
I think the Community M4 is an impressive design, but not optimized for home use. Designed for max dB, think NASCAR events or tractor pulls, it was to be heard and remain intelligible at long distances, thereby eliminating numerous lower output arrays. At almost 140dB full power, the thing can almost stop your heart.
I own the Community M200, which is a shallow 2" design with the phase plug very near the exit, mylar diaphragm, fairly flat from 400 to 3500 Hz approx. with more ragged extension to 8K Hz. Nice sounding driver on the Community horn made for it.
Their new VHF 1" driver looks very good. You may want to give them a call for their take on the best home use gear.
Aside from some of the more exotic Japanese designs mentioned, it will be difficult to find a compression driver that is affordable, has bandwidth down to 200 - 300 Hz, and still sounds good there. The 1.4" and 2" drivers I've heard sound pretty bad near resonance. Most horn people would agree that horn loading a 12" woofer is the least expensive way to provide good coverage in the midbass and still manage good integration to a mid/high horn.
In any case, good luck in your quest.
Tim
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