1. Fader Controls – The faders are marked CHANNEL 1 and CHANNEL 2 which correspond to the mic XLR inputs also marked CHANNEL 1 and CHANNEL 2. These channel faders control the post preamp gain.
2. Phone Jack – The jack marked PHONES is HP stereo output (3.5mm).
3. VU Meters (LED) – The VU meters are LED VU displays where the 0db LED position is 0db VU and the numbers correspond to decibel units. The left display is located above channel 1 fader and the right display is located above channel 2 fader. When the limiting function is enabled, limiting occurs between 0db and +6db VU.
4. Low Cut Filters – The switches marked 140 20 100 insert a 12db per octave hi pass filter in each channel as follows: the 20 position is a flat response to 20HZ, and the 100 and 140 positions roll off at 100HZ and 140HZ.
5. Pan Switches – The switches marked L PAN R allow assignment of the individual channels to the left and right mixing busses. The center position assigns each channel to the right and left busses.
6. Reference Tone – The TONE button when pushed IN (push on/push off switch) enables a 400HZ reference tone oscillator which provides a 0db VU reference tone to the right and left line outputs. The push button OUT position disables the tone.
7. Slate Mic – The push button switch marked SLATE when pushed in, enables the slate function to be outputted to the left and right line outputs.
8. Power Monitor – The LED marked PWR MON slowly cycles on and off under normal power voltage conditions and turns to a continuous ON when external power or battery voltages are dangerously low. Typically when the LED changes to a continuous ON condition, the time remaining for battery use is ½ to 1 hour.
9. Battery Test – The push button switch marked BATT TEST allows a battery voltage test which is indicated on the right LED VU display. A set of new batteries will indicate up to and including the 0db position on the display. When the batteries are dangerously low, the –9db LED will be the only LED on.
10. Power Switch – The three position POWER switch marked INT OFF EXT allows the mixer to be powered from the internal (batteries) or an external power source. The center switch position is OFF (no power source is connected).
11. Tape-Mix – This switch allows the monitor output (headphones) to receive audio from an external source (tape) or internal (mixer).
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