Issue 3, May 1997 Model 750 User Guide
Page 34 Studio Technologies, Inc.
Model 750
With the monitor stereo/mono button
set to stereo, and neither the speaker
nor the headphone outputs being
interrupted by the AUX interrupt func-
tion, the left channel of the selected
monitor source is connected to the left
meter; the right channel is connected to
the right meter.
Whenever the speaker output, the
headphone output, or both the speaker
and headphone output are interrupted
using the AUX interrupt function, the
signals on the AUX audio bus are auto-
matically connected to the meters; left
channel to the left meter, right channel
to the right meter.
When the stereo/mono button is in the
mono (in) position, the left and right
monitor signals, being either the normal
source or AUX interrupt, are added
(summed), attenuated by 6dB, and sent
to both the left and right meters.
Speaker Output
As part of the Model 750s monitor sec-
tion, a stereo speaker output is pro-
vided, along with an associated level
control and status LED indicator. The
speaker output is actually line-level, not
speaker level. Its designed to be con-
nected to an audio power amplifier and
associated loudspeakers, or amplified
speakers that contain internal power
amplifiers.
The signal source for the speaker output
is either the selected monitor source or,
when interrupted by the AUX interrupt
function, the AUX audio bus. If configura-
tion DIP switch 6 is set to the up (on)
position, any signal assigned to the AUX
audio bus will automatically replace the
normal monitor source. The LED labeled
AUX INT will light, indicating that the nor-
mal monitor source is being interrupted by
the AUX signal.
The speaker output is muted whenever a
voice message is being recorded, or one
of the talk back functions is active. The
speaker mute limits the amount of sound
that can get into the microphone, and can
prevent the occurrence of acoustic feed-
back.
Headphone Output
A separate stereo headphone output is
provided, along with an associated level
control and status LED indicator. The
phones output is designed to work well
with virtually any of the contemporary
medium and high-impedance headphones.
Sony MDR-7056s were used during the
design of the Model 750; their high sensi-
tivity made them go way loud! While a bit
bright in the high-end for our taste, their
comfort and fine design make them a good
choice for use with the Model 750.
If configuration DIP switch 7 is set to the up
(on) position, any signal assigned to the
AUX audio bus will automatically replace
the normal monitor source. The LED la-
beled AUX INT will light, indicating that the
normal monitor source is being interrupted
by the AUX signal. Unlike the speaker
output, the phones output is never muted.
Warning: Protect your ears! The
Model 750 is capable of driving head-
phones to extremely high sound pres-
sure levels. Hearing experts advise
against continuous extended play,
especially at high levels. Polka music
has been found to be especially dan-
gerous, so please be careful.
