170.879UK User Manual
Operation
Check the output of any channel by starting with its VOL (10) turned fully down.
HIGH & LOW EQ controls and PAN or BAL controls
should all be set in the mid position (12 o’clock).
Turn up the MAIN OUT or PHONES (31, 30) up and listen whilst playing the signal (or speaking into the
microphone) and increasing its VOL control gradually. Stop when the desired output level is reached.
Avoid aiming the microphone or instrument pickup towards the loudspeaker(s), which can cause feedback,
which is a loud whistling or howling sound caused when a mic or pickup hears its own output.
To adjust the tone characteristics of a Mic, Line or Instrument input signal, the high and low frequency
content can be individually cut or boosted using the HIGH and LOW EQ controls (4, 5)
Turning the HIGH control
clockwise from 12 o’cl
ock boosts the high frequencies (treble) for a
‘
brighter
’
sound and turning it anticlockwise cuts them for a
‘
duller
’
sound.
Turning the LOW control
clockwise from 12 o’cl
ock boosts the low frequencies (bass) for a
‘
thicker
’
sound
and turning it anticlockwise cuts them for a
‘
thinner
’
sound.
Boosting these too much can increase the chance of feedback, whereas cutting can sometimes help to
reduce feedback, so experimentation is often necessary.
Adjust the PAN/BAL control towards left or right as desired (9). It is sometimes beneficial to bias individual
channels to different sides of the stereo field to give separation and allow more detail in the mix.
Channels 1, 2 and 3/4 each have a volume control (10) to adjust the balance of each input in the mix.
When using the U-PAD as a main mixer for a digital recording setup via USB, the U-PAD is recognized as a
generic plug & play USB Audio Device. Check in the computer audio settings to ensure that the U-PAD is
selected for input and/or output within the recording software.
The mix of channels 1-4 is routed to the host computer via USB. The FROM button selects whether this is
from the PHONES output or MAIN outputs, offering a choice of level controls and monitoring options.
Turn down the MAIN OUT volume control before powering down to avoid loud noises through connected
equipment.
Audio played back from the host computer is routed to the U-PAD via USB and can be selected for output
to the PHONES or MAIN OUT by pressing one or both of the TO MAIN OUT or TO PHONES buttons.
Any audio from and to the USB interface is also mirrored on the 2TK IN and 2TK OUT RCA connections.
PHONES output (19) and MAIN OUT L+R (20) are also governed by their own volume controls (18, 23)
The overall level to the PHONES output can be displayed on the VU Meter LEDs by pressing in the METER
select button (22). When this button is not pressed in, The MAIN OUT L+R output will be displayed.
Turn down volume controls on connected equipment before disconnecting USB power from the U-PAD to
avoid loud noises which may cause damage.
