So how do you plan on feeding the amp? "Input" house strerio or car radio? You can actually get some inexpensive
House stereo's with built in Amps of 100 Watts up to 1500 watts, and even Pre-amp Subs are not that expensive anymore, you would be amazed at the low base some of the pre-amps can produce. Just a note: my son tried to do
what you are wanting to do and wound up under powering his amp and did in fact burn it up, Only about a 400 dollar
lesson

But I'm sure he did'nt ask anyone how to do before he tried it either :

so I showed him how he could take an Amp out of an old house stereo put it in a Banpass box with a pair of Punch 12" and connect it to a head unit ( stereo )and shake the roof off the house..... In a since I made a preamp sub base
Box - Check it out>>>>>>>>>>
I have this setting behind my recliner and really get the effect of it watching movies in the surround sound ;D
[attachment deleted by admin]