This part is a kind of semiconductor called PAL007A.

Function of this product has Power AMP.

Manufacturers : Pioneer

Image and pinout :

Some of the text within the PDF file :

IC INFORMATION Function Power AMP Type B.C.D MOS PAL007A J 1/1 E Model DEH-313/XM/JP sw_vcc +- -+ +- -+ TAB P-GND2 OUT2STBY OUT2+ VCC OUT1P-GND1 OUT1+ SVR IN1 IN2 S-GND IN4 IN3 AC-GND OUT3+ P-GND3 OUT3VCC OUT4+ MUTE OUT4- P-GND4 SWITCH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Protector; Over voltage Stand-by Circuit amp_vcc Reference Offset Detection Protector; Thermal Offset Detection amp_vcc +- -+ +- -+ Protector; Short circuit Offset Detection Offset Detection Protector; Over current limit Mute circuit sw_vcc stby 2001.10 [ ... ]

PAL007A PDF Datasheet Download