1 &2 – Combo Symmetrical Input (Big Jack & XLR)
3 – XLR Symmetrical Output
4, 5 – Input Circuit with Symmetrical, Differential Amplifier
6 – Input Sensitivity Switch
7 – Bass Controller Switch
8 – Bass Controller
9 – Bass Controller Level Switch
10 – Active Crossover Network – High Frequency Circuit
11 – Active Crossover Network – Bass/Mid-Frequency Circuit
12 – Equalizer – Bass/Mid-Frequency Circuit
13 – Tweeter Loudspeaker Level Switch
14 – Tweeter Protection System – Limiter
15 – Bass/Mid-Range Protection System - Limiter
16 – Tweeter Power Amplifier with Protection Circuits controlled by Power Amplifier Controller
17 – Bass/Mid-Range Power Amplifier controlled and protected by Power Amplifier Controller
18 – Power Amplifier Controller
19 – Two-Color LED Indicator – Power Amplifiers Clipping Indicator
20 – Loudspeaker System
21 – Power Cable Socket
22 – Power Fuse
23 – Power Switch
24 – GROUND LIFT Switch
25 – Power Supply Unit