Articles & Videos: 4-channel Amplifiers

Car amplifier buying guide
by Buck Pomerantz

This guide will help you choose the right amplifier - number of channels and how many watts per channel - for your sound system.

Video: car amplifier power
by Zak Billmeier, Ken Nail

We describe the basics of deciding how much power an amplifier should have when you're trying to match it to your speakers or subwoofers.

Make your music sound lively and vital with a Sound Ordnance amplifier. Watch this Crutchfield video for a quick overview of what these amplifiers have to offer.

Video: car amplifier channels
by Zak Billmeier, Ken Nail

One of the first steps in choosing an amplifier for your car audio system is to decide how you intend to use the amplifier, and thus how many channels it should have. This short video gives you a quick overview to help answer that question.

Video: car amplifier build quality
by Zak Billmeier, Ken Nail

If you can get the same amount of power from two different amplifiers, is there any reason to buy the higher-priced amp? What are you getting for that extra money? We'll discuss the differences in build quality and performance between lower-priced amplifiers and more-expensive options.

Video: car amplifier features
by Zak Billmeier, Ken Nail

This short video describes some of the common features you should look for when you're shopping for an amplifier for your car audio system. Not every amplifier will have all of these features, so make sure the amp that you get has the ones you need.

Subwoofer wiring diagrams
by Buck Pomerantz

With the wide variety of subwoofers available, it's easy to get confused about the best way to wire up your system. These wiring diagrams will help you find the configuration that'll get the most out of your subs and your amplifier.

Car amplifiers FAQ
by Buck Pomerantz

Where should I mount my amp? What wiring do I need? Does any of it come with the amp? What size power and ground wires do I need for my amplifier? How much air space do I need around my amplifier? What's the biggest amp I can hook up to my car's electrical system? Plus more.

Car amplifiers glossary
by Crutchfield Writing Team

Learn about the features and technical specifications found in today's amplifiers.

Cable gauge chart
by Buck Pomerantz

Need to know know which size of wire you should use when installing an amplifier? Use our handy cable gauge chart to find out.

Tuning your subs
by Buck Pomerantz

Having a subwoofer in your car is a good thing, but if the subwoofer isn't properly tuned, it won't sound as good as it should. This article describes how to adjust your amplifier so that your subwoofer will sound just the way you want it to.

Harold Jones, winner of  Virginia's IASCA Sound Quality Challenge, was kind enough to drop by Headquarters to show off his impressive ride. The centerpiece of...

This step-by-step guide will help you make sure that your amps and subs are evenly matched and work well together, whether you have the subwoofers and want to find the amplifier to run them, or you've already got the amp and want the right subs for it.

Setting amp gain correctly matches your amp's input level with your receiver's output level, resulting in maximum distortion-free music and minimum background noise. Here's a method for setting amp gain fast and accurately using test tones.

Amps make music fun
by Buck Pomerantz

When you add an amplifier to a system, the sound becomes higher, wider, and more realistic — like the band's playing on top of your dashboard and you're right there among the musicians.

One of our employees shares the excitement of having an amplifier in her car for the first time. We installed the Rockford Fosgate Punch P400-4 amplifier in her car, and she's more excited than ever to listen to her favorite tunes on the way home!

After a little over a year of driving my 2011 Subaru Impreza, I knew it was time to change out the system from factory equipped to an aftermarket setup. It also made sense to upgrade since I write all things speaker and subwoofer related for Crutchfield, and I get to hear amazing car stereo equipment on a regular basis thanks to our labs. The final product sounds amazing, and helps me enjoy riding around town even more.

Crutchfield Advisor Kramer equipped his 2009 Honda Element with a budget-friendly sound system. The system is built around a Kenwood receiver, complemented by Infinity speakers, and two amps and a sub from Alpine.

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