question on 4ch amps

[diminishedpower 10+ year member]

So i have four coaxial speakers in my car that i replaced factory with new ones and now want a amp for, if i want to keep the fading from left to right and back to front, is it true i need a 4 channel amp, and one set of speaker is 40 rms and other is 50, would the US Acoustics USX-4065 Amp be to powerful?

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[diminishedpower 10+ year member]

could sum1 please answer if they kno, i want to kno wether to buy the amp because i kno a guy who will give me a great deal, but i want to kno if it will blow my speakers or not

 

[Acidburn 5,000+ posts]

that amp is 4x 65 right? if so, i'd think it'd be fine as long as u watch the gains and don't overpower them