Perfect combo for a hard-hitting SQ system: one 1500D class D mono block
with 1200 watts RMS for your subs, and the versatile model 6550 with 4x50 +
2x75, can be run in 6/5/4/3 channel modes. 1500d in like-new condition with
owner's guide; 6550 unused, in original box with guide.

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