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1689A Mixer Preamplifier

 

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1689A Mixer Preamplifier

DESCRIPTION
Engineered for commercial, entertainment and cinema applications, the ALTEC LANSING Model 1689A brings the highest performance standards to a basic 2-input mixer/mixer extender preamplifier. Replacing the popular 1589B, the 1689A continues the tradition of dependable ALTEC LANSING quality in this latest 2-channel design.
The ALTEC LANSING 1689A is a compact twoinput mixer preamplifier with low distortion and excellent signal-to-noise characteristics. Each input channel is equipped with the option of microphone phantom power, gain reduction, 250 Hz high pass, balanced mic or line inputs.
The front panel contains the channel MIX controls, BASS control, TREBLE control, MASTER volume control, an ac POWER switch, and pilotlight. Link connectors are provided to connect the 1689A to the ALTEC LANSING 1692A or 1699A Mixer Preamplifiers.
The 1689A has a balanced and transformerisolated monaural output for 600-ohm loads. Additionally, an unbalanced line-level output is provided for each channel.
Power for the 1689A may be obtained from any 100/120/200/220/240V ac, 50/60 Hz line. Auxiliary 24/28V dc battery power may be connected to the battery terminal block on the rear of the chassis.
The 1689A is assembled on a 19-inch chassis that occupies 1'/, " of vertical rack space in a standard 19" equipment rack.


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