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Allen&Heath 21 Series User Manual

Page 7

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4

Monitor Output:

stereo 1/4" jack socket

tip = left
ring = right
outer = earth

Normal Operating Level = +4dBv

Maximum Gain = +10dB

Headphones Output:

stereo 1/4" jack socket

capable of driving stereo phones of 4ohms

to 600ohms impedance

Tie Buss Svstem:

Stereo Input -

stereo 1/4" jack socket

tip = left
ring = right
outer = earth

Gain to Stereo Output = 0dB

Stereo Output - stereo 1/4" jack socket

Normal Operating Level = +4dBv

Mono Input - mono 1/4" jack socket

Gain to Mono Output = 0dB

Auxilliary Input - stereo 1/4" jack socket

tip = cue
ring = echo
outer = earth

Gain to Output = 0dB

Auxilliary Output - stereo 1/4" jack socket

Normal Operating Level = +4dBv

PFL Input - stereo 1/4" jack socket

Gain to PFL Output = 0dB

tip = audio

ring = DC
o u t e r = 0 V

DC connect to 0V = PFL activated

floating = PFL not activated

PFL Output - stereo 1/4" jack socket

Normal Operating Level = 4dBv

DC PFL activated = 0V

PFL not activated = -8VDC into 1MEGohm load

Metering:

illuminated VU meters 0VU = +4dBv

PFL Busy Indicator:

turns on when PFL is activated