AVS Forum Special Member
Join Date: Jan 2014
Location: Burpelson Air Force Base
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It depends on the particular amplifier. If you use such an amplifier, read the instructions carefully and make sure you do not violate any of the specified conditions. Before you buy it, you should download the instructions and read them carefully.
I personally would use a separate power amp instead, so that in the event of failure, it would be easy to replace. Professional power amps can often be had for less than those designed for audio enthusiasts.
Normally, one uses the crossover in the receiver for the subwoofer anyway, so usually there is no need for one in the amplifier itself.
God willing, we will prevail in peace and freedom from fear and in true health through the purity and essence of our natural fluids. God bless you all.