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SR109 Professional Mixer
SPECIFICATIONS
Equipment Type
. .
.
. . . .
All silicon transistor mixer/pre-
amplifier
Number of
lnput Channels
. . .
. .
.
8
Power Output
. . . . . .
.
. .
+19 dBm (program line level)
Voltage Gain
*
Program
.
. . . .
.
.87 -13 dB MIC input to LlNE
-
LEVEL out
37 -+3 dB LlNE input to LlNE
LEVEL out
37 -13 dB MIC input to MIC
LEVEL out
Headphones
.
. .
.69 -13 dB MIC input to PHONES
out
Link
. .
.
.
.. .
. . .
.54.5 k 3 dB MIC input to LlNK
OUTPUT (with 600-ohm termi-
nation)
27 k 2 dB LlNK INPUT to LlNE
LEVEL output
Accessory
.
. .
. .
.59 t 3 dB MIC input to ACCES-
SORY output (via pins 1-8/IN-
PUTS)
54.5 k 3 dB MIC input to AC-
CESSORY
output
(via
pin
9/PROGRAM) (terminated with
600 ohms)
Frequency Response .
. .
k 3 dB, 20 Hz-20 kHz (150-ohm
source; 600-ohm load)
lnput Sensitivity
. .
. .
. .
.0.1 mV max. for +4 dBm program
output
Distortion
. .
.
. . . . . . .
.
.THD less than 1% at +12 dBm,
30 Hz-20 kHz; IM distortion less
than 1% at +12 dBm
Noise
(300 Hz-20 kHz) . .
. .
.
-
128 dBV (equivalent input noise
at full gain)
-72.8
dBm output noise (MAS-
TER Volume Control down)
-38.8 dBm output noise (MAS-
TER and one channel Volume
Control up)
Hum and Noise
(20 Hz-20 kHz) . . .
. . . -
125 dBV (equivalent input hum
and noise at full gain)
-61.8 dBm output noise (MAS-
TER Volume Control down)
-34.8 dBm output noise (MAS-
TER and one channel Volume
Control up)
Signal to Noise
(20 Hz-20 kHz)
.
. . . .
.Typically 83 dB at maximum out-
put with one channel Volume
Control and MASTER Volume
Control set at 8 (approximate-
ly 58 dB gain)
lnput Attenuation
. . . . .
.
0, 15 dB (switch-selected)
lnput Clipping Level
at 1 kHz:
MIC lnput
. . . . . . .
.
100 mV (ATTENUATOR out; Ch.
Volume at 2)
4.5 mV (ATTENUATOR out; Ch.
Volume at 12)
0.56V (ATTENUATOR in; Ch.
Volume at 2)
25 mV (ATTENUATOR in; Ch. Vol-
ume at 12)
LlNE lnput
. . . .
. .
.
.33V (ATTENUATOR out; Ch. Vol-
ume at 2)
1.35V (ATTENUATOR out; Ch.
Volume at 12)
90V (ATTENUATOR in; Ch. Vol-
ume at 2)
8.OV (ATTENUATOR in; Ch. Vol-
ume at 12)
lnput Common
Mode Rejection
.
. . .
. I 0 0 dB at 100 Hz
Low-Frequency
Equalization
. . . . . . .
. 2 1 3 dB at 100 Hz with respect to
0 (flat) setting
High-Frequency
Equalization
. . .
.
. . . .
2 1 2 dB at 10 kHz with respect
to 0 (flat) setting
Tone Oscillator
. . .
. .
. . .
1 kHz; less than 1% distortion;
variable level
lnput Impedance at
1 kHz:
Microphone
. . .
.2.1 kilohms balanced (for use with
25- to 600-ohm microphones)
Line (channels 7
and 8)
.
. . . .
. . . .
66 kilohms balanced bridging
Link lnput
.
.
.
. .
.35 kilohms unbalanced
Output Impedance:
Program
. .
. . . . .
Balanced line level: 120 ohms ac-
tual (for use with 25- to 600-
ohm inputs)
Microphone level: 0.5 ohms ac-
tual (for use with 25- to 600-
ohm inputs)
'Measurement conditions: MIC input through 150 ohms, LINE input through 33
kilohms LINK INPUT through 600 ohms PROGRAM LlNE LEVEL
terminated in
600
oh&,
PROGRAM MIC LEVEL terrhinated
in
150
ohms,
PHONES termi-
nated in 8 ohms: MASTER Volume, Channel Volume and PHONES Controls
full up; all other controls and switches 0
or
out.
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