1674C and 1678C Automatic Microphone Mixers

Frequency Response: ± 1 dB from 35 Hz to 15 kHz

Total Harmonic
Distortion: Less than 0.2% (0.8% in automatic) and from 35 Hz to 15 kHz at +14 dBm (3.88V into a 600 ohm load) Chan In to Main out channel fader and master fader at nominal levels.
Hum and Noise (IHF "A"
weighted ASA Z24.3
1944): -128 dBm EIN (150 Q termination) Channel In to Line Out

Inputs: 4/8 x Channel Inputs (Transformer Balanced)
_ 1 x Link Input
1 x Mute/Priority
control

Mixing Buses: 1 x Mix
1 x Premix

Control Buses: 1 x Reference 1 x Priority

Outputs: 4/8 x Line Outputs
4/8 x Logic Outputs
1 x Link Output
1 x Main Output
(Transformer Balanced)

Attenuators: 4/8 X Automatic VCA's 0 to 20 dB attenuation Channel Level
Indicators: 4/8 x LED's indicate VCA and logic output states

Controls and Switches: 4/8 x Channel volume
1 x Master volume
1 x Auto/manual
1 x Master/extension 4/8 x Preamp Gain 4/8 x Phantom Power 4/8 x Hi-Pass Filter 4/8 x Auto/direct 1/2 x Mic/line
Line Voltage: 100, 120, 200, 220, 240 VAC selectable nominal voltages ±15%, 50 or 60 Hz

Power Consumption: 25 watts maximum

Finish: Black

Dimensions: 3'/z" (8.9 cm) H x 19" (48.3 cm) W x 121/2" (33.7 cm )D

Weight: Model 1674C, 16 lbs. (7.3 kg) Model 1678C, 18 lbs. (8.2 kg)

Warranty: Limited, one-year parts and labor
t In these specifications, when dB represents a specific voltage, 0

dB is referenced to 0.775 volts rms. 0 dBm is a power level
referenced to 1 mW (0.775 volts driving a 6000 termination). For example, when 6.16 volts drives a high impedance, the level
is designated "+18 dB (6.16V)". When 6.16 volts drives a 6000 termination, the level is designated "+18 dBm".
`Signal at LINK OUT connector, pin 1.
"Signal at LINK IN connector, pin 1.
"'Signal at LINK OUT connector, pin 3. ""Signal at LINK IN connector, pin 3.