AVS Special Member
Join Date: Dec 2007
Location: Southern California
Mentioned: 1 Post(s)
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If the amp works OK when the sub is not connected, what makes you think the amplifier is bad? Connecting the sub should have no effect whatsoever on the amplifier unless something is shorting out within the sub.
That sounds like the problem is with the sub.
There is a NAD C325BEE advertised in the classifieds, which might be a good choice IF you actually have an amplifier problem. That might be a better-sounding amplifier than what you have.
Another very good amplifier is the Music Hall 15.2, which Music Direct has available for $499, which is an excellent price for a great amplifier.