Gastro-Mixer GMX-2500
®
Operation Manual
Josef Becker Pro Audio Technik · Technologiezentrum Herzbachtal · Zum Wartturm 15 · D-63571 Gelnhausen
Fon: +49-6051-9140-0 Fax: +49-9140-59
·
[email protected] · www.proaudio-technik.de
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GMX-2500 setup and operation
When opening the box, you should find:
• The mixer GMX-2500
• The 19" rack mount brackets (pre-installed)
• Equalizer protective cover plate (pre-installed)
• Two adapters: phone/RCA for the front line inputs
• Powercord
Unit dimensions:
435 mm x 280 mm x 88 mm (without rack mount brackets)
Weight:
4.4 kg net, 5.9 kg shipping
After unpacking the mixer please plug in the delivered
power cord into the power input jack of the unit. Before
connecting the mixer to the wall outlet, make sure that the
"POWER" switch on the right of the front side is in "OFF"
position. Also the main volume control (MASTER) should
be set fully counterclockwise ("0" position).
Attention:
Due to safety reasons the case never should
be opened by the user. Beside, this also may void any
warranty claims!
Now you may connect the mixer to a wall mains outlet.
Please make sure you first switch on the GMX-2500 and
then the power amplifier. This way you avoid annoying
audible transient noise.
On the left hand side you will find the 3 pin XLR female con-
nectors (
1
), the microphone inputs for connecting balanced
microphones. Close by on the right is a recessed push
button (
2
) for activation of phantom power when using
condenser microphones. When dynamic microphones
are hooked up, the switch remains in the "OFF" position.
Please note, that the microphone inputs on the front and
on the rear side are used in parallel. This means that you
may
either
use the front- or the rear inputs, not both of the
XLR input pairs
simultaneously
.
Beneath the XLR inputs you will find two 1/4" phone jack
inputs (
3
). These are line level inputs, for example to con-
nect a stereo keyboard or a device for playback music. The
left phone jack is a stereo type (TRS)
e.g. tip = left channel, ring = right
channel input. When using mono
phone plugs connect left and right
plugs as printed on the housing. In
case you want to use a cable with
RCA connectors, we have enclosed
two suitable adapters in the packag-
ing for your convenience.
controls on the front side
