Pioneer's GM-D1004 4-channel amplifier will power your front and rear speakers with 45 watts RMS each, which is way more power output compared to a factory car radio or aftermarket receiver. Even better, this compact amplifier runs so efficiently that it can often get its power from the same circuit as your receiver, saving you some wiring hassles. And its tiny size means you can install it almost anywhere, even behind the dash in many vehicles. You can bridge a couple of the GM-D1004's channels together and drive a subwoofer with 90 watts while still powering a pair of front speakers. Universal harnesses let you get signal from an aftermarket receiver's RCA outputs or a factory radio's speaker wiring.

General Features:

• RMS Power Output (Watts x Channels): 45 x 4
• Peak Power Output (Watts x Channels): 100 x 4
• Power at 2 Ohms (Watts x Channels): 45 x 4
• Bridged Power (Watts x Channels): 90 x 2
• Minimum Impedance Bridged: 4
• Minimum Impedance Unbridged: 2
• Best Frequency Response: 10-40k Hz
• THD at Rated RMS Power: 1%
• Signal to Noise Ratio: 74 dB
• Input Voltage: 14.4v
• Amplifier Class:FD
• Low-Pass Crossover Frequency: 80 Hz

• Low-Pass Slope (dB/octave): 12 dB/octave
• High-Pass Crossover Frequency: 80 Hz
• High-Pass Slope (dB/octave): 12 dB/octave
• Fan Cooled: No
• Fuse Rating: 15
• Speaker Level Inputs: Harness
• Preamp Outputs: No
• Width (inches): 8-1/8
• Height (inches): 1-9/16
• Depth (inches): 2-9/16