Functional reference
Rear panel
1. Input Volume
2. Frequency Crossover
3. Phase
4. Auto On/Always on
5. EQ 1
6. EQ 2
7. High Pass/Subsonic
8. XLR/Balanced Input
9. RCA/Low level Input
10. Standby/On indicator
11. High Level input
12. Fuse
13. Power select
14. Power connector