Q2 Audio Compex F760X-RS User Manual - page 2
AUDIO & DESIGN (READING) LTD.
with Q2 Audio, LLC
Communication Bulletin No. 103
14th January, ‘13
(original: 9th June, ‘74)
Further information available @ www.q2audio.com
Initial Unpacking and Set-up
After carefully removing your Compex from it’s shipping box, save the packaging for a few days to be sure you do not
need to return the unit for any reason. If necessary please return it using the original box and packing materials. Before
applying mains power check that the power transformer is properly configured for your mains voltage by checking the
small window visible on the fuse drawer of the IEC mains connector. When the drawer is removed (use a straight bladed
screw driver) a small PCB can be seen which will slide out and it can be flipped over to select the proper mains voltage
for your area. There are two settings, one marked “110V” which is for operation at 110V to 120V and one marked “240V”
which is for operation at 220V to 240V. Fuse ratings for specific mains voltages are screened on the back of the Compex.
If there are any questions, please contact Q2 Audio directly via the contact info at: www.q2audio.com. There are no user
serviceable parts inside the Compex, please contact your dealer or Q2 Audio for servicing. Unauthorized third party ser
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vicing will void the warranty.
Audio XLR I/O wiring:
The audio is connected via standard 3-pin XLR. Inputs and outputs are unbalanced unless ordered with the transformer
option. The pinout is as follows:
Pin 1: Chassis
Pin 2: Audio +
Pin 3: 0V (Audio -)
If problems such as hum, etc., are encountered there are a couple of possible routes to eliminating this: 1) lift shield at
Pin 1 of input audio wiring. This is easiest to accomplish in the XLR connector on the end of your wiring. If that does not
fix the problem, lifting pin 3 at the input may be the next choice. This same sequence can be followed on the output XLR.
Interfacing unbalanced equipment can be a challenge in certain instances.
Side Chain Insert TRS wiring:
Both the compression and expander/gate side chains can be accessed via the TRS on the rear panel (factory default is
compression). The TRS jack is of the switching type so it can be permanently wired to a patchbay although it is possible
that this could lead to noise pickup in electrically noisy environments.
The pinout of the TRS jack is as follows:
Tip: Return
Ring: Send
Sleeve: 0V (shield)
If you wish to use switch the side chain access TRS jack to allow access to the expander/gate for ducking or similar ef
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fects, REMOVE/ISOLATE FROM MAINS POWER FIRST! Once mains power is removed,removing the top cover and
move the insert wire from the main PCB to the front panel PCB. On the front panel PCB you will find a three pin header
with a shorting jumper on it. The jumper needs to be removed and the insert wiring needs to be moved from the main PCB
and installed on the three pin header on the front panel PCB. The jumper that was removed from the front PCB needs to
be installed on the main PCB in place of the insert wiring that was removed – install between “go” and “return” so those
two points are shorted together (without the jumper the compression will not work).
by
Compex F760X-RS