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This external DC input is protected from reverse polarity. If you mis-apply
connect external power of the incorrect polarity, the mixer will not be damaged, it
simply will not power up.
CONSTRUCTION
A. CHASSIS
The new M4mkII Mixer chassis has been designed for increased torsional
rigidity. This increased rigidity provides a stable base for the mixers modern
electronics. The complete chassis is formed from 0.040” aircraft aluminum. All
punching is done on a computer controlled “Strippet” rotary turret punch press for
extreme accuracy. In addition, through careful design, we have managed to
lower the overall weight of the M4mkII Mixer to 3 lbs. (1.36Kg) total. A full half-
pound lighter than its predecessor and lighter than any other professional four-
channel mixer in its category.
The mixers sheet metal is hand-formed using various press brake setups before
the all stainless steel threaded insert are pressed permanently into place. The
housing parts are then Chem Film TM plated for superior corrosion resistance
before being electro-statically coated with an epoxy powder coating. This
powder coat paint is then baked on in an oven. Powder coating chosen for its
durability and environmental friendly characteristics.
All silk-screening is printed sub-surface (below) a hardface lexan tm overlay.
This process provides a silk-screened label that is virtually wear proof. The
lettering will not wear off as on other mixers.
B.
ELECTRONIC TOPOLOGY
The new M4mkII audio mixer was designed from a clean sheet of paper. It
utilizes completely new circuitry designs based upon the latest advances in semi
conductor technology. In addition, it features surface mount technology for
reduced size and weight.
The M4mkII Mixer uses high quality transformers on its inputs and outputs.
Transformer topology was chosen for its inherent ability to reject RF, thus making
this new mixer perfect for use with multiple RF systems.
This new design uses modern semi-conductors from Maxim, Linear Technology
National Semiconductor, Burr-Brown and Analog Devices to name but a few.
These operational amplifiers, voltage regulators and precision voltage references
feature low power consumption, low noise and low distortion. The also feature
ability to swing from rail to rail resulting in an energy efficient design.