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.
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 kΩ
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)
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