Power and speaker connections
1. Left front speaker output
2. Right front speaker output
3. Left speaker output
4. Right speaker output
5. Remote turn-on input
6. Ground input
APX1301E power and speaker connections
APX2121E power and speaker connections
APX4241E power and speaker connections
7. Battery +12V input
8. Fuse
9. Left rear speaker output
10. Right rear speaker output
11. Mono speaker output
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