Using one channel of an amp to run a sub

thor098
thor098 Posts: 38
edited June 2010 in 2 Channel Audio
I recently purchased a Parasound 2100 preamp which has internal sub gain and frequency controls. I also have an adcom 545 amp that I'm not using any longer. Is it a dumb idea to use it as a sub amp?
2 CH
Parasound 2100 preamp
Polk Lsi15s
powered by a
Parasound HCA 1500a
2 Passive JBL 10" Subs
powered by a second
Parasound HCA 1500a

HT
Denon 3311-CI
Polk Lsi15 Fronts
Polk LsiC Center
Polk Lsi7 Surrounds
2 Passive Polk 10" Subs
powered by ADCOM 545
Post edited by thor098 on
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Comments

  • FTGV
    FTGV Posts: 3,649
    edited June 2010
    If as you say your pre has an integral crossover and gain controls thats a very good idea and a good amp.It should serve the purpose nicely.In fact that amp is likely bridgeable so you could turn it into a high powered mono bloc,with the caveat that the impedance of the woofer be kept reasonably high >6 ohms.What do you have planned for the sub?
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  • Polkie2009
    Polkie2009 Posts: 3,834
    edited June 2010
    I've got one of those old 545 Adcom amps also,but I don't think mine is bridgeable. I once thought about using it to run my center channel.
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  • thor098
    thor098 Posts: 38
    edited June 2010
    I don't believe the 545 is bridgeable. Correct me if I'm wrong. So for now I'm planning on using the speakers and boxes from two JBL PB10's that I have.
    2 CH
    Parasound 2100 preamp
    Polk Lsi15s
    powered by a
    Parasound HCA 1500a
    2 Passive JBL 10" Subs
    powered by a second
    Parasound HCA 1500a

    HT
    Denon 3311-CI
    Polk Lsi15 Fronts
    Polk LsiC Center
    Polk Lsi7 Surrounds
    2 Passive Polk 10" Subs
    powered by ADCOM 545
    · Share on FacebookShare on Twitter