Alpine KTP-445U Power Pack 45 watts RMS X 4

Want a simple way to crank up the power of your receiver? Alpine's "Power Pack" amplifier increases your receiver's power output to 45 watts RMS by 4 channels. That's a big jump up from the 7-20 watts per channel typically put out by a car radio, and plenty of power to drive high-performance speakers or keep up with a big subwoofer amplifier. Best of all, this compact amplifier is so efficient you can often run it off the same circuit that powers your receiver. A universal plug lets you feed a signal via RCA outputs or speaker-level wiring.

•compact Class D amplifier for factory and aftermarket receivers
•universal plug lets you send signal from RCA outputs or speaker-level wiring
•runs off same power circuit as receiver (must be 15-amp or more)
•4-channel amplifier
•45 watts RMS x 4 at 4 ohms (CEA-2006 compliant)
•built-in high-pass crossover (selectable 60, 80, 120 Hz at 12 dB/octave)
•selectable gain switch (high/low) and switchable 2- or 4-channel operation
•fuse: 15A
•dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D