Amps: 1200W RMS Monoblock, 320W Max 4 Chan, 600W Max 2 Chan
 

1st Amp:

Kenwood 4 channel Amplifier $40

Excellent quality and clarity for my component speakers.

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Get your motor runnin', get out on the highway. And get a Kenwood KAC-649S 4-channel amp driving all your speakers for outstanding musical reproduction even at high volume levels. High- and low-pass crossovers are built into the front and rear channels for your convenience, while speaker-level inputs let you add this amp to any system.
Details:

* 2-, 3-, or 4-channel output
* Tri-way capable (Tri-Way crossover required)
* 80 watts x 2 in bridged mode
* 40 watts x 4 at 2 ohms
* requires 10-gauge power and ground leads
* 80 Hz selectable low-pass crossover, 12 dB/octave
* 150 Hz selectable high-pass crossover, 12 dB/ octave
* speaker-level inputs
* preamp outputs
* 4-way protection circuitry
* signal-to-noise ratio 100 dB
* 11-1/4"W x 2-1/4"H x 11-5/8"D

2nd Amp:

Lanzar Vibe 228 $40

This was a great entry level amp that could actually overwhelm some of the big box electronic stor3e subwoofers (it has 00 watts RMS in bridged mode):

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2 x 200 Watts RMS at 4 Ohms 2 x 400 Watts Max at 4 Ohms 1 x 800 Watts Max at 4 Ohms Bridged 2 x 300 Watts at 2 Ohms Electronic Crossover Network Bass Boost Circuit Bridgeable at 4 Ohms 2 Ohms Stereo Stable Tri-Mode Capable Gold RCA Inputs Line Outs For Left & Right Channels. Power & Protection LED Indicators Advanced Protection Circuitry Soft Turn On/Off Remote Control Bass Booster Frequency Response: 15 Hz - 35 kHz S/N ratio: 90dB

3rd Amp:

Ultra Linear UL400HC $100 (BEAST!)

This amp obliterated my 12" Alpine Type R. In less than 1 week it blew the subwoofer through the surround. It's 1OHM stable, and produces over 1200watts RMS (real watts) It's dirty and you're getting it cheap. It isn't pretty, but it's not meant to be. This would easily pressure two JL W7's and I would recommend at least 2 awg wire:

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1 x 500W RMS @ 4 Ohm Mono 1 x 800W RMS @ 2 Ohm Mono 1 x 1200W RMS @ 1 Ohm Mono 1 x 1800W MAX @ 1 Ohm Mono Dimensions (W x H x L): 12.5”x 2.6”x 15.67”