User Guide

Model฀74/75฀User฀Guide฀ Issue฀3,฀November฀2016฀
Studio฀Technologies,฀Inc.฀ Page฀39
for Surround
ture฀and฀isn’t฀a฀design฀deficiency.฀The฀overall฀
level฀for฀a฀pair฀of฀headphones฀connected฀to฀
a฀Model฀35฀Talent฀Amplifier฀is฀adjusted฀using฀
the฀Model฀35’s฀level฀control.฀A฀headphone฀
cue฀system฀connected฀to฀the฀Model฀74’s฀
line-level฀cue฀output฀must฀have฀its฀own฀level฀
controls.
Remote฀Controls
Four฀hard-wired฀remote฀control฀signals฀฀
can฀be฀connected฀to฀the฀system฀and฀config-
ured฀for฀the฀desired฀operating฀characteris-
tics:฀mute฀all,฀dim,฀talkback,฀and฀input฀select.฀
In฀addition,฀an฀infrared฀(IR)฀receiver฀can฀be฀
connected฀to฀allow฀wireless฀activation฀of฀the฀
talkback฀function.฀
When฀remote฀mute฀all฀is฀activated฀the฀LED฀
on฀the฀Model฀75฀associated฀with฀mute฀all฀฀
will฀flash.฀If฀mute฀all฀was฀already฀active฀฀
when฀the฀remote฀mute฀all฀function฀is฀activat-
ed,฀the฀LED฀will฀change฀from฀being฀steadily฀
lit฀to฀flashing.
When฀remote฀dim฀is฀activated฀the฀LED฀on฀
the฀Model฀75฀associated฀with฀the฀dim฀func-
tion฀will฀flash.฀If฀dim฀was฀already฀active฀when฀
remote฀dim฀is฀activated,฀the฀LED฀will฀change฀
from฀being฀steadily฀lit฀to฀flashing.
When฀remote฀talkback฀is฀activated,฀either฀
via฀a฀hard-wired฀connection฀or฀an฀infrared฀
(IR)฀signal,฀the฀LED฀on฀the฀Model฀75฀associ-
ated฀with฀the฀talkback฀function฀will฀flash.฀฀
If฀dim฀was฀already฀active฀when฀remote฀talk-
back฀is฀activated,฀the฀LED฀will฀change฀from฀
being฀steadily฀lit฀to฀flashing.
When฀remote฀input฀select฀is฀activated,฀the฀
LED฀on฀the฀Model฀75฀associated฀with฀the฀
selected฀input฀will฀flash.฀If฀the฀function฀is฀set฀
for฀exclusive,฀no฀other฀LEDs฀will฀be฀lit.฀If฀the฀
function฀is฀set฀for฀non-exclusive,฀the฀LED฀฀
associated฀with฀remote฀input฀select฀will฀
flash,฀while฀the฀LEDs฀associated฀with฀any฀
other฀active฀inputs฀will฀remain฀steadily฀lit.
Model฀35฀Talent฀Amplifier
Up฀to฀four฀Model฀35฀Talent฀Amplifiers฀can฀
be฀connected฀to฀a฀Model฀74.฀The฀power฀
present฀LED฀on฀each฀Model฀35฀should฀be฀
lit฀whenever฀it’s฀connected฀to฀a฀powered-
up฀Model฀74.฀The฀user฀is฀provided฀with฀a฀
rotary฀level฀control,฀stereo/mono฀button,฀
and฀two฀¼-inch฀3-conductor฀(stereo)฀head-
phone฀jacks.฀One฀or฀two฀pairs฀of฀head-
phones฀with฀a฀total฀impedance฀of฀75฀ohms฀
or฀greater฀can฀be฀connected.฀Adjust฀the฀
control฀to฀achieve฀the฀desired฀output฀level.฀
To฀highlight,฀the฀headphone฀output฀level฀is฀
only฀adjusted฀using฀the฀Model฀35’s฀rotary฀
control;฀there฀are฀no฀headphone฀level฀ad-
justments฀available฀on฀the฀Model฀75.฀Using฀
the฀button฀the฀output฀can฀be฀selected฀for฀
stereo฀or฀mono.฀When฀selected฀for฀mono,฀
the฀left฀and฀right฀channels฀are฀combined฀
(summed)฀and฀routed฀to฀both฀the฀left฀and฀
right฀outputs.
Warning:฀Protect฀your฀ears!฀The฀฀
Model฀35฀Talent฀Amplifier฀is฀capable฀
of฀driving฀headphones฀to฀extremely฀
high฀sound฀pressure฀levels.฀Hearing฀
experts฀advise฀against฀continuous฀ex-
tended฀play,฀especially฀at฀high฀levels.
Technical Notes
Downmix
The฀downmix฀functions฀are฀implemented฀in฀
the฀Model฀74฀Central฀Controller’s฀hardware฀
using฀analog฀circuitry.฀From฀the฀factory฀
5.1฀to฀stereo฀downmix฀is฀defined฀as:฀cen-
ter฀dropped฀in฀level฀by฀6฀dB฀and฀routed฀
to฀left฀and฀right;฀left฀surround฀dropped฀in฀
level฀by฀3฀dB฀and฀routed฀to฀left;฀right฀sur-
round฀dropped฀in฀level฀by฀3฀dB฀and฀routed฀
to฀right;฀LFE฀muted.฀By฀making฀simple฀