Alpine KTP-445U 4-channel Power Pack Amplifier
Brand: ALPINE
Universal Class D 4-Channel Head Unit Power Pack for Use with all Aftermarket & Factory Receivers
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.
45 watts RMS x 4 at 4 ohms (CEA-2006 compliant)
Dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D