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Good passive subwoofer?

I have an unused Adcom GFA-555 amplifier rated at 600 watts bridged mono into 8 ohms. I am thinking about using it to power a passive sub. Does that sound like a good idea? It would be mostly for use with movies, as I am happy with the full-range bass in my KEF 104.2's for 2 channel music. Any suggestions for a passive sub? The signal path would be from the sub pre-out on my pre/pro or receiver (which I haven't chosen yet). Thanks!
javachip

Showing 2 responses by javachip

javachip OP
56 posts
 
Oh, another question. Is phase control more important with one sub or two subs, or is it equally important with both?
javachip OP
56 posts
 
Thanks to all for the very helpful info. I looked at the VMPS website; it appears not to have been updated since 2002. Their phone number still works, so I left a message.
I will check out the other suggested brands as well.

How important is the phase control? What changes do you hear as you adjust from 0 to 180 (or whatever), and how noticeable are those changes? Can the same changes be achieved by adjusting sub placement?
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