Three alpine amps in order 4/3/2 channel power amplifier MRV - F301 4/3/2 channel power amplifier MRV - F-300 2/1 channel power amplifier MRV - 1005 All three work fine no weird sounds no humming or crackling. Had them for years (7+) They’re all beasts guaranteed to piss the neighbors off, They need to be put to good use as I don’t have a car they were taken out of anymore. Would love to hear them being put to good use. * back covers have some rust from being mounted under the back seat in my suburban. Throw me offers, Trades always welcome cash is always king I will break up the set, or sell individuals if needed. Cheers! Rockford, JL, alpine, Soundstream, Pioneer Kicker, Monoblock, Amp, old school,