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Hello,
I am adding an open baffle 15" woofer to augment the lows (xover at 55Hz) of my horns.
I need a recommendation regarding an amp for the woofers.
My main amps are Wright Sound MONO 7 (300B).
Which amp should I try, transistor or tube (push pull)?
Is there a transistor amp that has the same bass sound of a 300B SET?
Yehuda.
Hi Yehuda ... you can use any "good" transistor amp, even as low powered as 50 wpc, for that low a cut-off. I'd urge you to explore putting your low pass filter, then a volume pot, BEFORE the amp, and just use a cap across at the speaker side for impedance matching (this will depend on impedance curve of your woof)
Follow Dan L suggestion with this OB bass experiment with that low of XO. make sure it is a GOOD OB bass driver that will not come apart. If I were to do again it would be a custon AE bass driver for OB lows & JBL high eff stuff for everything else.. ala I could use any amp I want for everything but 80 hz up. Now PakProtector...aka Douglas uses a PP amp for his bi-amp gig, So there is many ways to do it. Jeff M advice is very sound if coherancy is job 1 in a perfectly done speaker system. BUT OB bass is very differant animal...at least the way I like OB bass.
Joe
ps I do niether now & just listen to vinatge JBL & build tube amps..much less stress ...
Yehuda
I use Rythmik Audio Mosfet Plate Amps
for my bass and can't be happier.
Newer models are different than mine
as they seem to be more adjustable now.
I use the 12dB/Octave slope version because
this seems to blend better with the speakers.
DanL
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Hi Yehudah,
Hey, thats a great question!!
Ideally, the amps (and speaker cables) in a multi amped speaker should all match, so as to have the same time constant and sound. Its seldom done properly, but some people do know to do this, Xavier Cortes reported last week he uses six 300B amps, each the same, on his triamped horns.
That is the right way.
Jeff Medwin
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