What sub are you thinking of using?
The noise is usually not an issue with sub amps... the darned subs won't play RPM-related noises since they won't move fast enough, the buggers: )
Alpine amps are by far the best of the "head-unit" brands for amplifiers. Their newer models are funny-lloking (to some), hard to adjust due to adjustment location, and kinda big, so not too many I know have a lot of experience with them. The one thing I would say is that all Class D amps generate some FM interference. The JL seems least likely to jam yourFM based on experience on other cars, but the Alpine shouldn't be a problem either.
I don't neccesarily think the JL is one ofthe best-SOUNDING amps out there... but I think it's very well built, reliable, and with its regulated power supply it is a consistent performer (the Alpine will put out more power while you are accelerating due to the slightly higher alternaor output, so your amp sounds worse when you slow down.)
I don' think you'll screw up either way, but make sure that someone knows that the amp you get won'tjam your FM, or make sure you have an exchange path when you buy it.
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