ARCHITECT’S & ENGINEER’S
SPECIFICATION
The mixer amplifier shall incorporate a 300 watts mono-
phonic amplifier, a 10-band graphic equalizer and a mono-
phonic mixer with 8 microphone/line- input channels.
Microphone inputs shall be on XLR-type connectors and line
inputs shall be on balanced 1/4
″
Tip-Ring-Sleeve phone con-
nectors. An independent line-level CD/tape input (routed to
channel 8) shall be on phono connectors. Each channel shall
have a trim control, an effects send, a monitor send, 4-band
equalization, a peak-level indicator (5 dB before clipping) and
a level control.
The mixer shall provide main, monitor and effects outputs
on 1/4
″
phone connectors, as well as a preamp out and power
amp in for submix applications on 1/4
″
phone connectors.
Four effects returns shall be provided on 1/4
″
phone connec-
tors, and each shall have an independent level control.
Phantom power of +48 volts shall be provided for operation of
condenser microphones. The amplifier shall be passively
cooled. Amplifier output shall be provided on two 1/4
″
phone
connectors. Indicators shall be provided for output-signal level,
power, +48 volts and amplifier protection. The unit shall be of
a rack-mount type.
The amplifier shall deliver maximum power equal to or
greater than 300 watts into 4 ohm, signal-to-noise equal to or
greater than 105 dB, THD less than 0.0045% and frequency
response of ±1 dB from 10 Hz to 28 kHz. The mixer shall have
residual noise of -110 dB, signal-to-noise equal to or greater
than 78 dB and THD less than 0.045%. Total power consumed at
full audio power shall be 544 W (115 Vac) and 594 watts
(230/240 VAC). Dimensions shall be 17.75
″
(451 mm) wide,
4.92
″
(125 mm) deep and 11.02
″
(280 mm; 4 rack spaces)
high. Weight shall be 31 lb. (14.1 kg). The mixer amplifier
shall carry a three-year warranty.
The mixer amplifier shall be a SAMSON S83.
+
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
LOW
2.5K HIGH
3
2
3
2
30Hz
125Hz
500Hz
2K
5K
64Hz
250Hz
1K
3K
10K
AMP 1W
POWER AMP
SPEAKER OUT
MINIMUM 2 Ohm
POWER SW
POWER AMP
PHANTOM SW
POWER LED
PHANTOM LED
7818
7919
1
500Hz
1
LOW
2.5K HIGH
500Hz
COAP
1
3
2
1
3
2
PEAK
EFF 1/ MON
EFF 2 / REV
LEVEL
EFF 1/ MON
EFF 2 / REV
LEVEL
LINE
BALANCED
-40 +0 +4dB
TRIM
MIC
LINE
MA
MIC
TAPE
-10dB 10K Ohm
RETURN 1-2
RETURN 1
RETURN 2
+4 dB 47 Kdm
SUM
SUM
SUM
LA
PHONE
PHONE
REVERB
REVERB UNIT
EFF SEND 2
+ 4dB 600 Ohm
+ 4dB 600 Ohm
+ 4dB 600 Ohm
+ 4dB 600 Ohm
PREAMP OUT
LEVEL
EFF SEND 1
MON OUT
MON
RES
RETURN 3-4
RETURN 3
RETURN 4
700F LED BAR GRAPH
DRIVER
L
R
MA
TRIM
PEAK
4 BAND EQ
CH 1-7
CH 8
M
A
I
N
E
F
F
1
/
M
O
N
E
F
F
2
/
R
E
V
P
H
A
N
T
O
M
10 BAND GRAPHIC EQ
4 BAND EQ
Specifications subject to change without notice. © 1998 SAMSON
S83 SPECIFICATIONS
MIXER/PREAMP SECTION
THD (with 30 kHz LPF, trim center):
< 0.045%
Signal-to-noise ratio (with 30 kHz LPF, trim center):
78 dB
Maximum voltage gain
Mic in to preamp out: effects send 1, 2, mon out:
62 dB
Line in to preamp out: effects send 1, 2, mon out:
52 dB
Tape in to preamp out: effects send
10 dB
Tape return to preamp out:
5 dB
Residual noise (with 30 kHz LPF, VR min)
Preamp out:
-110 dB
Mon out:
-100 dB
Trim gain:
40 dB
Tone controls
High (10 kHz):
± 15 dB
2.5 kHz:
± 12 dB
500 Hz
± 12 dB
Low (80 Hz):
± 15 dB
Graphic equalizer (30, 64, 125, 250, 500 Hz, 1, 2, 3, 5, 10 kHz):
± 15 dB
Peak LED:
5 dB before clipping
Tape input sensitivity (-10 dB):
300 mV
Headphone:
20 mW (8
Ω
)
POWER AMP SECTION
Rated output power (1 kHz):
300 W into 4
Ω
220 W into 8
Ω
THD (with 30 kHz LPF):
< 0.0045%
Signal-to-noise ratio (with 30 kHz LPF):
105 dB
Frequency response (±1 dB):
10 Hz to 28 kHz
Input sensitivity/impedance:
1.2 V/10 k
Ω
Residual noise (VR min):
74 dB typical
Idle current (across the 0.47
Ω
emitter resistor):
< 7 mA
DC offset voltage:
0 ± 50 mV
GENERAL
Dimensions:
451 mm (w) x 125 mm (d) x 280 mm (h)
19
″
(w) x 4.92
″
(d) x 11.02
″
(h)
Weight:
31 lb. • 14.1 kg
Power requirements:
115 VAC • 50/60 Hz
544 W (115 VAC)
Power consumption (at full power):
395 W (230/240 VAC)
