is 40x4 @ 4 ohms okay, i have a like new pioneer gm-4300, very small and puts out awesome power, pretty sure it puts out more with a higher voltage. have a crap load of refs, so legit seller here :
Well i have a audiovox amp-590 2 channel. Never used. Not to sure on the rms has a 15 amp fuse , high and low input and a fixed crossover (high ,low , off). A friend gave it to me for building a trim panel for his amp rack. $35 shipped.