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More complete descriptions of the M-S and X-Y stereo recording techniques can
be found in the literature of the major microphone manufacturers such as
Neuman, Sennheiser, and Scheops.
POWERING:
A. INTERNAL POWER, ALKALINE BATTERIES
Six "AA" alkaline batteries can used to power the M3 Mixer. These batteries are
housed in a convenient battery compartment located on the right side of the
mixer. When using alkaline batteries, you can expect 3 to 7 hours of operation
under normal circumstances. Please not that the meter back lamps draw a great
deal of power and will shorten your battery life by as much as 35%.
Note: Never store your M3 Mixer for extended periods of time with alkaline
batteries installed in the mixer. There is a possibility that the batteries may
leak causing corrosion of the mixer. Battery leakage and the resulting
corrosion damage is not covered under the M3 Mixer warranty.
B. EXTERNAL POWER
The PSC M3 Mixer can also be externally powered from any source of DC power
from 7 to 18 Vdc. The mixer consumes approximately 200 mA over this voltage
range.
This current consumption is nearly constant and does not vary
dramatically over operating voltages like other mixers.
The external power
connector is located on the right side of the mixer. Pin outs of this Hirose 4 pin
connector are as follows:
Pin 4 (+) Positive
Pin 1 (-) Negative
Pin 2 and 3 switched contacts used with our NP-1 battery adapter.
This external DC input is protected from reverse polarity. If you in-advetantly
connect external power of the incorrect polarity, the mixer will not be damaged, it
simply will not power up.
CONSTRUCTION
A.
CHASSIS
The new M3 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" and 0.050" 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
keep the overall weight of the M3 Mixer to under 4Lbs. (1.8Kg) total.
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
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