Amp for MTX 8510

[thejoe1027]

I need a 500 RMS amp at 2 ohms for an MTX 8510 in a ported box.

I bought a Sony XM-1S but it is basically a piece, it wont ground even though I have tried three other amps on the same ground and it worked perfectly fine with those.

Looking at a Kenwood 8104D but I don't know. Suggestions? Trying to keep it somewhat cheap...

http://www.crutchfield.com/p_158XM1S/Sony-XM-1S.html?tp=115http://www.crutchfield.com/p_113KAC8104/Kenwood-KAC-8104D.html?tp=115

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