| Contact assignment of the 38-pin plug connection for amplifier |
| 3 - | Midrange speaker front right - |
| 4 - | Bass speaker front right - |
| 5 - | Bass speaker front left + |
| 6 - | Midrange speaker front left - |
| 7 - | Treble speaker front right - |
| 8 - | Treble speaker front left + |
| 9 - | Bass speaker rear left + |
| 10 - | Bass speaker rear right - |
| 11 - | Treble speaker and midrange speaker rear right - |
| 12 - | Treble speaker and midrange speaker rear right + |
| 13 - | Treble speaker and midrange speaker rear left + |
| 14 - | Treble speaker and midrange speaker rear left - |
| 15 - | Midrange speaker front right + |
| 16 - | Bass speaker front right + |
| 17 - | Bass speaker front left - |
| 18 - | Midrange speaker front left + |
| 19 - | Treble speaker front right + |
| 20 - | Treble speaker front left + |
| 21 - | Bass speaker rear left - |
| 22 - | Bass speaker rear right + |
| 27 - | Mono 1 left, input - |
| 28 - | Mono 2 right, input - |
| 29 - | Left stereo, input - |
| 30 - | Right stereo, input - |
| 35 - | Mono 1 left, input + |
| 36 - | Mono 2 left, input + |
| 37 - | Left stereo, input + |
| 38 - | Right stereo, input + |
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