M441M · RTO-144 Connections
PREAMP · series S400 · line in 600 Ω, out 600 Ω
Rear connector
Inputs and outputs
Audio connections · RTO-144 A / B
| Port | Signal | Dir | Pin + | Pin − | Pad + | Pad − |
|---|---|---|---|---|---|---|
| A1 | MIC-IN | in | 1 | A | 1.A.1.P | A.A.1.N |
| A2 | LINE-IN | in | 5 | E | 5.A.2.P | E.A.2.N |
| A3 | FoldBack OUT | out | 10 | L | 10.A.3.P | L.A.3.N |
| A4 | SWITCHED CH ON OUT | out | 16 | T | 16.A.4.P | T.A.4.N |
| B1 | PREAMP-OUT | out | 4 | D | 4.B.1.P | D.B.1.N |
| B2 | BOOSTER AMP IN | in | 8 | J | 8.B.2.P | J.B.2.N |
Bus connections
| Bus | Dir | Signal | Pin + | Pin − |
|---|---|---|---|---|
| SUB1-RS1 | out | BUS-SUB1-RS1-OUT | 11 | M |
| SUB2-RS2 | out | BUS-SUB2-RS2-OUT | 12 | N |
| SUB3-RS3 | out | BUS-SUB3-RS3-OUT | 13 | P |
| SUB4-RS4 | out | BUS-RS4-OUT | 14 | R |
| AUX1-FB1 | out | BUS-FB1-OUT | 10 | L |
| SOLO-CUE | out | BUS-SOLO-CUE-OUT | 9 | K |
Power · bench PSU
| Rail | Style | Volts | Max A | Supply | Ground | Link |
|---|---|---|---|---|---|---|
| VCC-AUDIO | OLD | 48 | 0.1 | 22 | V | — |
| VCC-LOGIC | OLD | 24 | 0.1 | 20 | Y | — |
Source: Ward-Beck Systems - Module RTO-144 Jumper calculator.xlsx (Database tab). Pin direction is inferred from the signal name. Verify against the module schematic before wiring.
WBS Ward-Beck Systems Ltd.
Title
M441M RTO-144 connections
Drn.
make_rto144.py
Date
Oct 17 2026