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1692B Mixer Amplifier

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1692B Mixer Amplifier

SPECIFICATIONS
Type: Mixer/amplifier with 6 input channels
Gain: 81 dB (may be reduced approximately 14 or 28 dB with gain switches)
Output: +18 dBm (6.15 volts) with 600 ohm line
Frequency Response: ±1 dB, 20-20,000 Hz
Total Harmonic Less than 0.25% from 35 Hz
Distortion (THD): to 100 Hz; less than 0.05% from 100 Hz to 20 kHz at +10 dBm (2.45V) into a 600 ohm load with channel and master volume controls at nominal levels.
Input Impedance: 150/250 ohms nominal source impedance (transformer isolated balanced input)
Load Impedance: 600 ohms (transformer
Link Load
isolated output)
Impedance: 200 ohms
Link Output Voltage: Approximately +4 dBm (1.23V) at rated output
Aux In/Out Load (no load)
Impedance: 4500 ohms
Aux In/Out Voltage: Approximately +4 dBm (1.23V) at rated output (no load)
Hum and Noise: -128 dBm EIN (150 ohm termination) Channel In to Line Out (from 20 Hz to 20,000 Hz)
Controls: 1 POWER on-off ac line switch 6 INPUT MIX controls, continuously variable potentiometers
Gain reduction switches for 54 dB, 40 dB or 26 dB of preamp gain selection 2 MASTER controls, continuously variable potentiometers, ±12 dB
1 tone control disable
per output
2 BASS controls, continuously variable potentiometers, ±12 dB 2 TREBLE controls, continuously variable potentiometers, t12 dB 6 OUTPUT ASSIGNMENT switches, 3-position 6 PHANTOM POWER switches, +15 Vdc available 2 LINE/MIC switches (channels 5 and 6) 1 high pass filter (250 Hz) per channel, 6 dB/octave (internal)
1 low pass filter (5 kHz) per output, 6 dB/octave (internal) 1 Tone control defeat switch per channel (internal) 1 ground lift switch per " output
Indicators: 2 LED VU meters, -21 to +6 VU with peak detection
Connections- at +14 VU (+18 dBm)
Inputs 1-6: 6 XLR type receptacles (F)
Link: 2 phono jacks per channel
Aux. In/Out: 1 phono jack per channel
Balanced Output: 1 XLR type receptacle (M)
per channel
Battery Power: 3-terminal, barrier type
terminal block
AC Power: Power cord, with NEMA
5-15 plug
Power 100/120/200/220/240V ac,
Requirements: 50/60 Hz, 10 watts Operating
Temperature Range: Up to 55°C (131°F) ambient Dimensions: 5',i4 " H x 19" W x 8" D
(13.34 cm H x 48.26 cm W x
20.32 cm D)
Weight: 13 pounds (5.91 kg)
Enclosure: Rack mount chassis with
heavy duty front handles Color: Black
Accessory: 1692/99 RVC (Remote
Volume Control Kit)


ARCHITECT'S AND ENGINEER'S SPECIFICATIONS

The mixer/amplifier shall have six independent microphone input channels. Six MIX gain potentiometers shall be provided for these channels. Each channel shall he provided with selectable gain positions of 54 dB, 40 dB or 26 dB to prevent distortion when using high output microphones. Input channels 5 and 6 shall be switchable for microphone or high level input devices. Outputs shall incorporate two MASTER volume controls, two BASS equalization controls and two TREBLE equalization controls. Each channel shall be provided with a low pass filter (5 kHz) at 6 dB/octave. A tone control defeat switch, ground lift switch and high pass filter (250 Hz), shall also be provided for each output channel. The mixer/amplifier shall contain a power supply capable of operating from a 100/120/200/220/240V, 50/60 Hz line or from a 24/28V dc battery. The power supply shall automatically transfer the power to dc operation if ac power fails. Normal operating controls shall be on the front panel. Connections shall be on the rear panel.
The mixer/amplifier shall meet the following performance criteria. Gain: 81 dB. Output: +18 dBm with 600 ohm line. THD: Less than 0.25% from 35 Hz to 100 Hz; less than 0.05% from 100 Hz to 20 kHz at +10 dBm into a 600 ohm load with channel and master volume controls at nominal levels. Frequency response: ±1 dB from 20 Hz to 20 kHz. Input impedance: 150/250 ohms nominal with balanced input. Load impedance: 600 ohms. Hum and noise: -128 dBm FIN with 150-ohm termination. The mixer/amplifier shall be 5ya" H x 19" W x 8" D and shall weigh 13 pounds.
The mixer/amplifier shall be the ALTEC LANSING Model 1692B.

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