Home > Consumer Reviews > Alpine PDX-4.100 4 Channel Digital Amplifier

Amp is outstanding. High-performance power from under my seat. BUT! Apparently, when you order the product online, despite them telling you there is a warranty, there is NONE! I set the levels a bit too high and hit some safety protection mode, but the amp got stuck in that mode. Watch your levels if you're installing on your own!

I started with the pdx 4.100. After a week I purchased the mono version to power my subs. I would stack them but they're mounted to the backs of my rear passenger seats to conserve trunk space. Clean consistent power all the time. Made numerous changes to my system except for this amp. It's definitely a keeper. I love the small footprint and quiet operation. Just use good cables, wires, and the appropriate adapters where applicable and you'll be fine. I can't see myself using any other amp in my car.

Alpine does not sell on Amazon, nor do they allow their authorized dealers to do so. Thus the product has ZERO WARRANTY and may have altered or removed serial numbers (against the law to possess or sell in most states). To verify if a retailer is authorized go to www.alpine-usa.com ~ don't get ripped off.

This is the best amplifier you can buy, great power and great size, you can put it almost on any space of the car, try to install component speakers with it.