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PAGE 10
reAr PANeL CONTrOLS: (Continued)
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EFFECTS LOOP: (Continued)
NOTE: Always use good quality shielded cable of the shortest possible length when patching
your effects. One foot lengths are preferable - with lengths of more than 3 feet (each cable) starting to roll off top end and reduce
midrange punch and clarity.
The LOOP is fitted with a “Hard Bypass” switch that allows you to completely remove all associated LOOP circuitry from the signal
path when you are in the studio or when the LOOP is not to be used. While many won’t be able to hear any discernible difference
with the LOOP bypassed, for you purists, it will give you peace of mind that your signal is as direct as possible.
To use the EFFECTS LOOP:
1) Connect the SEND jack to your processor’s Input
2) Connect the RETURN jack to your processor’s Output
3) Switch the EFFECTS LOOP BYPASS switch to the ON position.
4) Adjust the processor’s Input/Output Level attenuator to achieve unity gain by toggling the LOOP switch in and out of BYPASS
while making fine adjustments at the processor until you hear no level difference. Keep in mind you might have to adjust the M6
CARBINE OUTPUT control also if the processor indicating lights read unity gain (look good and are not clipping).
NOTE: The EFFECTS LOOP IS optimized for professional quality rack mount processors. Most pedal type effects work better in the
“front-end” between your instrument and the INPUT. You will experience some tonal changes because of the additional cable and
the fact that your instrument will no longer be going straight into the grid of the first tube. It’s up to you to decide if the trade off is
acceptable.
GROUND LIFT, DIRECT OUT:
This section captures the entire pre-amp signal including the Effects Loop and allows you to send
a Balanced signal to either a House Main Board or a Recording console. There are two elements to this circuit which are; (1) a male
XLR jack and (2) a GROUND LIFT switch.
GROUND LIFT: This switch removes the circuit-to-chassis ground connection from the XLR jack. Leave it in the ground-
ed position (switch down) normally unless you experience a hum when connecting to a console. If you do experience a
hum when connecting the XLR Output to a console, try lifting the ground (switch up) on the circuit. This will usually (but
not always) remedy most ground loop type noise from the signal path.
Sometimes it may also be necessary to lift the A.C. Cable Ground also by using a 3-2 ground adapter to achieve a quiet signal
path.
NOTE: Ground loops can occur in many places in a complex signal path. The DIRECT OUTPUT GROUND LIFT switch is not a cure-
all and therefore should not be expected to remedy every type of ground related problem.
Now that we have the Rear Panel sussed-out, you are ready to enjoy the musicality and shear power of the M6 CARBINE. We
hope this instrument brings you many years of inspiration and musical discovery. From all of us here at MESA…Enjoy!