Sony Sony XM-GS4 4-channel car amplifier — 70 watts RMS x 4

Sony's XM-GS4 4-channel amplifier will drive your whole system, sending 70 watts RMS to each of your front and rear speakers. Or you can switch the amp into 2-channel mode to power a couple of subs with 160 watts RMS each. This compact amp sports a hefty heatsink that gets rid of the heat that's generated when you're pushing your system hard. 

Product info:

• 4-channel car amplifier
• 70 watts RMS x 4 at 4 ohms (80 watts RMS x 4 at 2 ohms)
• 160 watts RMS x 2 at 4 ohms in bridged mode (4-ohm stable in bridged mode)
• CEA-2006 compliant
• frequency response: 10-100,000 Hz
• separate variable high- and low-pass filters for front and rear channels (50-300 Hz, 12 dB per octave)
• separate variable subsonic filters for front and rear channels (6-70 Hz, 12 dB/octave)
• separate bass boosts for front and rear channels (0-10 dB at 40 Hz)
• preamp and speaker-level inputs
• cooling fan
• fuse rating: 30A x 2
• 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
• 10-3/4"W x 2-1/8"H x 8"D