User Guide

Issue฀3,฀November฀2016฀ Model฀74/75฀User฀Guide฀
Page฀10฀ Studio฀Technologies,฀Inc.฀
for Surround
that฀arrives฀via฀the฀surround฀inputs.฀(It฀
would฀be฀confusing,฀and฀technically฀incor-
rect,฀to฀refer฀to฀LFE฀loudspeakers.)
Installation
In฀this฀section฀you฀will฀be฀installing฀the฀
Model฀74฀Central฀Controller฀in฀an฀equip-
ment฀rack.฀Audio฀input,฀monitor฀output,฀and฀
headphone฀cue฀system฀connections฀will฀be฀
made.฀One฀or฀more฀Model฀35฀Talent฀Ampli-
fiers฀will฀be฀connected.฀A฀location฀will฀be฀
selected฀for฀the฀Model฀75฀Control฀Console฀
and฀it฀will฀be฀connected฀to฀the฀Model฀74.฀
If฀required,฀external฀equipment฀will฀be฀
interfaced฀to฀the฀remote฀control฀inputs.฀
AC฀mains฀power฀will฀be฀connected฀to฀the฀
Model฀74.
System฀Components
The฀shipping฀carton฀contains฀one฀each฀of฀
the฀following:฀Model฀74฀Central฀Controller,฀
Model฀75฀Control฀Console,฀9-pin฀D-sub฀
interconnecting฀cable,฀and฀user฀guide.฀
Units฀destined฀for฀North฀America฀also฀
include฀an฀AC฀mains฀cord.฀Your฀dealer฀or฀
distributor฀will฀provide฀an฀AC฀mains฀cord฀
for฀non-North฀American฀destination.฀Model฀
35฀Talent฀Amplifiers฀will฀be฀contained฀in฀
separate฀cartons.
Mounting฀the฀Model฀74
The฀Model฀74฀Central฀Controller฀requires฀
one฀space฀(1U)฀in฀a฀standard฀19-inch฀
equipment฀rack.฀Select฀a฀location฀that฀is฀
convenient฀to฀both฀the฀analog฀audio฀sig-
nals฀and฀the฀Model฀75฀Control฀Console.฀A฀
cable฀is฀provided฀to฀connect฀the฀Model฀75฀
with฀the฀Model฀74.฀Secure฀the฀Model฀74฀
into฀the฀equipment฀rack฀using฀two฀mount-
ing฀screws฀per฀side.
Audio฀Connections
Line-level฀audio฀signal฀connections฀are฀
made฀by฀way฀of฀four฀25-pin฀female฀D-sub฀
connectors,฀located฀on฀the฀Model฀74’s฀back฀
panel.฀To฀implement฀all฀the฀available฀fea-
tures฀four฀cable฀harnesses,฀each฀with฀a฀25-
pin฀D-sub฀plug฀(male)฀on฀one฀end฀and฀the฀
desired฀connectors฀on฀the฀other฀end,฀are฀
necessary.฀These฀cable฀harnesses฀are฀not฀
supplied฀by฀Studio฀Technologies.฀Note฀that฀
our฀friends฀in฀some฀locations฀may฀use฀the฀
term฀“loom”฀instead฀of฀harness.
The฀wiring฀scheme฀used฀by฀the฀D-sub฀con-
nectors฀comply฀with฀that฀made฀familiar฀by฀
TASCAM®.฀Wiring฀harnesses฀prepared฀for฀
connecting฀to฀the฀Model฀74’s฀surround฀and฀
stereo฀inputs฀are฀identical฀to฀DA-88-style฀
input฀harnesses.฀A฀wiring฀harness฀prepared฀
for฀the฀monitor฀output฀A฀and฀line-level฀cue฀
outputs฀is฀identical฀to฀that฀of฀a฀DA-88-style฀
output฀harness.฀A฀wiring฀harness฀prepared฀
for฀the฀fourth฀D-sub฀is฀slightly฀different.฀It฀is฀
used฀for฀connecting฀with฀the฀six฀channels฀
of฀monitor฀output฀B฀as฀well฀as฀the฀line-
level฀talkback฀input.฀As฀such,฀it฀will฀require฀
careful฀attention฀when฀selecting฀the฀right฀
terminations,฀e.g.,฀six฀male฀plugs฀and฀one฀
female฀connector.฀Please฀refer฀to฀Figures฀6฀
through฀11฀for฀the฀exact฀connection฀details.฀
Be฀certain฀to฀note฀that฀the฀Model฀74’s฀D-sub฀
connectors฀use฀4-40฀threads.
Unless฀there’s฀a฀special฀need,฀it฀may฀be฀
cost฀and฀time฀effective฀for฀you฀to฀purchase฀
commercially฀made฀cable฀harnesses.฀Let฀
the฀large฀market฀for฀DA-88-style฀cabling฀
help฀you฀painlessly฀install฀your฀system!฀
There฀is฀one฀caveat฀to฀using฀pre-made฀
harnesses.฀The฀sex฀of฀the฀connector฀associ-
ated฀with฀the฀line-level฀talkback฀input฀may฀
need฀to฀be฀changed.฀Even฀so,฀using฀pre-
made฀cables฀harnesses฀may฀still฀provide฀
helpful.