User Guide
Table Of Contents
Model 780-01/790 User Guide Issue 4, December 2020
Studio Technologies, Inc. Page 47
for Surround
Appendix A—Connection Pin-Out
Charts
Signal Pin Direction
Data Shield 1 Shield
Remote Mute All 5 Input
Remote Dim 6 Input
Remote Spare 1 8 Input
Remote Spare 2 9 Input
Remote Input Common 4 Common
Note: Connector type on Model 780-01 is 9-pin female
D-subminiature (DE-9F). Connector uses 4-40
threaded inserts for locking with mating plug.
Connections for Remote Control Inputs
Signal Pin Direction
Data + (RS-485) 1 To/From Models 790/71
Data – (RS-485) 6 To/From Models 790/71
Data Shield 2 To/From Models 790/71
DC + (12 V) 4 To Models 790/71
DC – (12 V Return) 9 To Models 790/71
DC Power Shield 5 To/From Models 790/71
Note: Connector type on Model 780-01 is 9-pin female
D-subminiature (DE-9F). Connector uses 4-40
threaded inserts for locking with mating plug.
Connections between Model 780-01 and
Model 790 and Model 71
Signal Signal
Connections Channel High (+) Low (–) Shield
Surround Input A
L/R 1 24 12 25
Surround Input A
C/LFE 2 10 23 11
Surround Input A
SL/SR 3 21 9 22
Surround Input A BL/BR 4 7 20 8
Surround Input B L/R 5 18 6 19
Surround Input B C/LFE 6 4 17 5
Surround Input B SL/SR 7 15 3 16
Surround Input B BL/BR 8 1 14 2
Notes: 1) All signals transformer-coupled digital audio;
balanced AES3 (110 ohm
s, 5 Vpp) compatible.
2) Connector type on Model 780-01 is 25-pin female
D-subminiature (DB-25F). Installer must provide male
(DB-25M). Connector uses 4-40 threaded inserts for
locking with mating plug.
3) Wiring scheme follows AES59-2012 convention.
Standard TASCAM-type wiring harnesses are directly
compatible, with the possible exception of 4-40 screw
threads being required.
Connections for Surround A and Surround B
Digital Inputs
Signal Signal
Connections Channel High (+) Low (–) Shield
Pre-Fader L/R 1 24 12 25
Pre-Fader C/SUB 2 10 23 11
Pre-Fader SL/SR 3 21 9 22
Pre-Fader BL/BR 4 7 20 8
Post-Fader L/R 5 18 6 19
Post-Fader C/SUB 6 4 17 5
Post-Fader SL/SR 7 15 3 16
Post-Fader BL/BR 8 1 14 2
Notes: 1) All signals transformer-coupled digital audio;
balanced AES3 (110 ohms, 5 Vpp) compatible.
2) Connector type on Model 780-01 is 25-pin female
D-subminiature (DB-25F). Installer must provide male
(DB-25M). Connector uses 4-40 threaded inserts for
locking with mating plug.
3) Wiring scheme follows AES59-2012 convention.
Standard TASCAM-type wiring harnesses are directly
compatible, with the possible exception of 4-40 screw
threads being required.
Connections for Digital Monitor Outputs










