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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 M3 CARBINE. We
hope this instrument brings you many years of inspiration and musical discovery. From all of us here at MESA…Enjoy!
reAr PANeL CONTrOLS: (Continued)
VACUUM T UBE PREAMPLIFIER
MOSFET POWER
HAND BUILT IN PETALUMA, CALIFORNIA
120 V~
60 Hz
5 A
6.25 A
WARNING:
Replace fuse with same type/rating only.
Do not expose to rain or moisture.
CAUTION:
Risk of Electric Shock. Do Not Open.
No user serviceable parts inside.
®
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