Thankx in advance for the help.
I have a deck with front and rear powered outs.
I have an amp with RCA ins and high level ins.
Question is, can I hook up my deck's speaker wires to my
"high level input" on the amp.?

yup the manual for the amp should tell you what wire goes to witch on the supplyed little harness for the amp

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02 GRAND CARAVAN SPORT

SPEAKERS: -6 1/2" component from energy still to come concidering alternatives
-2x Massive audio CW12 in 4.2cf dual chamber square ported at ~35hz

Amps: -DD SS1
-KAC-745

Upgrades: -160 amp alt. maybe
-4 gauge wiring (done)
-0 gauge BIG 3 (done)
-sound deadning the shit out of the van somewhat not done yet
?????????

Thankx you people make life so easy