Output Signal Lights
The two lights near the output jacks indicate the
signal level present on the main output jacks. The left
light turns a brighter blue as the left channel output
gets louder. The right light turns a brighter green as
the right channel output gets louder.
Stereo TRS/Balanced Switch
This switch selects the type of output on the main 1/4” jacks.
When the switch is flipped down to
Balanced
, the jacks will output a balanced signal suitable
for a TRS cable. The left and right jacks will output the left and right channels of the mix,
respectively. On the TRS cable, the signals are as follows:
Tip = + Signal, Ring = – Signal, Shield = Ground.
If a mono cable is used instead of a TRS cable, the circuitry will automatically convert to
unbalanced mode and the amplitude will be compensated so the overall volume remains the
same. If possible, use balanced signals and TRS cables, as they reduce noise substantially.
When the switch is flipped up to
Stereo TRS
, the left jack changes functionality in such a way
that both the left and right channels of the mix will be output on the left jack. On a TRS cable
in the left jack, the signals are as follows:
Tip = Left channel, Ring = Right channel, Shield = Ground.
If a mono cable is patched into the left jack while the switch is flipped to
Stereo TRS
, the
right channel will be grounded and muted. This means the right jack will no longer output
properly. Therefore, flip the switch to
Balanced
if you are using mono cables.
Besides this potential grounding of the right signal via a mono cable in the left jack, no
change to the right jack happens when the switch is flipped to either position: the right jack
always outputs a balanced signal.
Headphones Output
Headphones Jack
The headphones jack is a stereo 1/8” jack (3.5mm) designed for outputting to headphones.
Any headphones can be used, though 8 to 32 ohms is recommended. The jack can also be
used as an additional output to connect to an external device that requires a TRS stereo
signal. However, use the main outputs if possible because the frequency response and noise
specifications of the headphones output are not as good as the main output jacks, and this
output does not have the anti-pop circuitry.
Headphones Level Knob
This knob sets the headphones volume. It’s independent of the
Main Level
knob.
Page of
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7
Type of 1/4” Cable
Switch Setting
Jacks to Use
Balanced (TRS)
Both jacks
Mono
Both jacks
Stereo L/R (TRS)
Left jack only
(L/R stereo signal)
!
Balanced
!
Stereo TRS
!
Balanced
Balanced
Stereo
TRS
Note:
The signal lights only indicate
relative dynamics. Pulsing
lights often indicate beats or
throbbing sounds. It’s normal
that the blue lights are
brighter than the green lights
at softer volumes.
