Looking for amplification advice

[TunaNoCrust]

Hi all,

I have a non-hk 10-speaker e36 coupe. Currently have:
-Deck: Alpine CDA-9855
-Subs: JL-10w0 x 2 with JL JX250 amp = 250w.
-Rear: Alpine R-Series 6x9 coaxial.

-Front: Currently stock, but I am planning on installing Alpine R-Series 5.25" components (to match rear)

I have an old amp I would like to use. Alpine V12 MRV-f300s: 50w x 4ch, or 75w x 2ch RMS.

MY QUESTION: If I used the V12 amp, would it be better to amp just the fronts at 75w each or all 4 speakers at 50w?

Thanks in advance.

[Mless5]

I would use your 4 channel to amplify each corner.

[MarcoZandrini]

I believe that the factory amp has built in crossovers. So, if you replace that amp with an aftermarket amp you’ll need to install crossovers.