Wow, 50wpc at 1% THD.

I have a 1979 ADS P-100 rated 50wpc into 4 ohms at .005% at 12v Its only 30 years old.

as far as no money, yea I hear that.

but like the others said, save your pennies and buy an amp that is decent for a sub. I'm not crazy about high power levels and I was running 240W x2 in a standard cab pickup with semi decent efficiency subs. It did what I needed for 7 yrs. But when you move the woofers from right behind your seat in the cab, to in the trunk all of that goes out the window.