M464 · RTO-144 Connections

FILTER · series L-EFFECT · line in 600 Ω, out 600 Ω

Rear connector

REAR VIEW · CARD EDGE · 22 CONTACTS1FILTER-IN-LEFT +2FILTER-IN-LEFT −3456789101112131415Filter-OUT-RIGHT +16Filter-OUT-RIGHT −171819VEE-AUDIO -25V20GND21VCC-AUDIO +25V22CHASSISInputOutputPowerGround / chassis

Inputs and outputs

M464FILTERFILTER-IN-LEFTA1 1 / 2FILTER-IN-LEFTA3 1 / 2Filter-OUT-RIGHTA2 15 / 16Filter-OUT-RIGHTA4 15 / 16INPUTSOUTPUTSVEE-AUDIO-25 V 19 / GND 20VCC-AUDIO25 V 21 / GND 20CHASSIS22

Audio connections · RTO-144 A / B

PortSignalDirPin +Pin −Pad +Pad −
A1FILTER-IN-LEFTin121.A.1.P2.A.1.N
A2Filter-OUT-RIGHTout151615.A.2.P16.A.2.N
A3FILTER-IN-LEFTin121.A.3.P2.A.3.N
A4Filter-OUT-RIGHTout151615.A.4.P16.A.4.N

Power · bench PSU

RailStyleVoltsMax ASupplyGroundLink
VEE-AUDIONEW-250.219202
VCC-AUDIONEW250.221201

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
M464 RTO-144 connections
Drn.
make_rto144.py
Date
Oct 17 2026