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General Notes about
Modifications
We’ve tried to make these mixers as universal
as possible, but you can’t please everyone all
the time. For certain applications, you may
find these signal routing changes beneficial.
They’re easy to make if you have experience
soldering and working on electronic equip-
ment, but if you don’t have the experience,
this is NOT a good place to learn. Take your
mixer and this book to a qualified technician.
Here are the obligatory warnings and dis-
claimers that our lawyers made us include.
We think it’s a good idea to heed them (the
warnings, not the lawyers), too.
Caution! These modification
instructions are for use by qualified personnel
only. To avoid electric shock, do not perform
any servicing other than changing the fuse
unless you are qualified to do so. Refer all ser-
vicing and modifying to qualified personnel.
Mackie Disclaimer
Any modification of any Mackie product
must be performed by a competent electronic
technician. LOUD Technologies accepts no
responsibility for any damages or injuries
caused by any modification, regardless of the
source of the modification instructions or the
qualifications of the technician performing
them. In the case of such damages, LOUD
Technologies may declare warranty privileges
void. BE CAREFUL!
About Jumpers
These modifications involve cutting traces on
the circuit board and installing jumpers
between pads. We recommend solid (non-
stranded) wire, 26-28 gauge. The type of wire
used for wire-wrapping is easy to form, lays
neatly against the circuit board, and has insu-
lation that doesn’t melt easily from the heat
of a soldering iron.
When installing jumpers, do not run their
ends through holes in the circuit board.
Rather, solder them flat against the desired
pad (the flat silver area, possibly with a hole
in the middle). Make sure the ends of these
flat wires do not extend beyond the pad.
Holes
Jumper
Solder
BEFORE
AFTER
