1. Audio Input RCA connector;
2. Audio Output RCA connector;
3. Variable high pass filter control (5Hz ~80Hz);
4. Variable low pass filter control (80Hz ~20KHz);
5. Variable signal gain control;
6. Variable bass boost control (0dB - +12dB);
7. Variable bass reinforcement frequency control (35Hz ~ 55Hz);
8. Negative audio output connector (-);
9. Positive audio output connector (+);
10. Positive power supply connector (+12v)
11. Remote power supply connector (REM);
12. Negative power supply connector (GND);
13. “Protection” Led indicator;
14. “Clip” led indicator;
15. “Power on” Led indicator.