Re: (OT) Jaycar / ReSponse amps.
Ive got a 4 by 100 as well running my speakers now.
Ive got no complaints, I had it running 2 JBL 230wrms subs for a a year but bought a monoblock and an L7 so put the amp onto my speakers and it does both very well. It was cheap as well.
Twin Cam EA falcon
SWB Ford Maverick