Any basshead will tell you that big power is key to great sound, but sometimes you just don't have much space for a big amp. Kenwood's Excelon X502-1 mono subwoofer amplifier can send up to 500 watts RMS to your subwoofer, and it'll fit almost anywhere in your vehicle. A precise low-pass filter lets you optimize the sound for your sub, while the built-in bass boost lets you dial in just the right amount of thump.

Need power, but lack space? Kenwood's Excelon X302-4 four-channel amplifier delivers 50 watts RMS per channel, yet still fits almost anywhere in your vehicle. Switch this amp over to bridged, 2-channel mode, and you can power a pair of high-performance speakers or subs with 150 watts RMS each. In 3-channel mode, you can use the amp's front channels to drive a pair of speakers with 50 watts each, and bridge the rear channels to send 150 watts to a sub. This versatility pays off as your system evolves over time.

Kenwood makes tough, rugged amplifiers that bring you superior sound quality along with reliable performance. When you power your subwoofer with Kenwood's Performance Series KAC-9106D amplifier, you'll hear all the great tonal color, impact, and detail in your music's bass, from the hard punch of the rhythm section to the soft thump of a quiet kick drum.

Clean power can transform a mediocre sound system into a great one. Kenwood's Excelon Reference Series XR401-4 4-channel amplifier will add clarity and punch to your sound, as it powers each of your front and rear speakers with 75 watts RMS. If you're adding bass first, you can use the amp in 2-channel mode to drive a couple of subwoofers with up to 200 watts RMS each. Then later you can switch the amp over to your main speakers when you get a sub amp. The XR401-4 can fit in many different places in your car because of its incredibly low profile — it's under 1-1/2" tall.

Car amplifiers have come a long way. Kenwood's Excelon Reference Series XR901-5 amp can power your entire audio system while taking up an astonishingly small amount of space — it's smaller than a 2" stack of computer paper. But this compact 5-channel workhorse will send 60 watts RMS to each of your front and rear speakers, along with up to 600 watts RMS to your sub. You could also use the XR901-5 in 3-channel mode to drive a pair of high-performance speakers or components with 150 watts RMS each, while still sending 600 watts RMS to a sub.

Need more power for your entire system, but lack space? Kenwood's Excelon X802-5 five-channel amplifier delivers 50 watts RMS to each of your front and rear speakers, while sending up to 500 watts RMS to a sub, yet it'll still fit almost anywhere in your vehicle. You can also use this amp in 3-channel mode to power a pair of high-performance speakers with 150 watts RMS each, and a sub with 500 watts.

Car amps have come a long way. Kenwood's Excelon XR901-5 car amplifier can power your entire audio system while taking up an astonishingly small amount of space — it's about the size of a piece of computer paper, and it stands only 2" tall. But this compact 5-channel workhorse will send 60 watts RMS to each of your front and rear speakers, along with up to 600 watts RMS to your subs. You could also use the XR901-5 in 3-channel mode to drive a pair of high-performance speakers or components with 150 watts RMS each, while still feeding 600 watts RMS to your sub.

There's power and then there's POWER. The Kenwood Excelon XR1001-1 sub amplifier powers your sub with up to 1,000 watts RMS, and that's a real world rating, not that inflated number you find printed on a lot of amps. Even better, the XR1001-1 can fit into many different places in your car because of its incredibly low profile — it's only 2" tall.

The problem is your premium sound system is just not loud enough, but replacing the puny factory amplifier with a more powerful one will result in losing some of your vehicle's audio functions and all its audible notifications. Kenwood's Excelon XR600-6DSP 6-channel amplifier with digital signal processing makes a great solution paired with an iDatalink AR amp replacement module, adding a huge amount of power and tuning ability to your system while retaining all of the vehicle's audio and communication functions.