The limiter configuration in the models MF8 and MF12 takes place in the driver board
(DRIVER MF8/12 ALTAIR- 074). Part of this board is showed in the next figure. This badge is
located parallel to the power amplifier bottom plate. The driver board is wide, occupying
almost the whole width of the power amplifier. The limiter configuration switch is close to the
rear panel, in the center a little toward the left (as you face the front panel).
NOTE:
The factory configuration of these controls, is marked in the rear panel of the power
amplifier. If you change this configuration, write it in the white box placed in the power
amplifier's rear panel to avoid confusions.
CHANGING XLR INPUT CONNECTORS POLARITY
The XLR input connectors, could configure with the PIN3 positive or with the PIN 2 posi-
tive (A.E.S. recommendation). With the polarity switch pushed, the XLR input polarity is: PIN 3
positive, PIN 2 negative, PIN 1 ground. If the polarity switch is not pushed, the input XLR
polarity is: PIN 2 positive, PIN 3 negative, PIN 1 ground.
Each channel has their own polarity switch, for what you could configure each channel
independently. This is true whenever the power amplifier works in STEREO mode, since if it is
working in MONO or BRIDGE mode, the XLR input polarity configuration of the channel 2
(CH2) will remain disabled, remaining as valid configuration the channel 1 (CH1) one.
NOTE:
In the models MF8 and MF12 that have Jack 1/ 4" as input connector besides the XLR-
3-31, the polarity configuration of the XLR connector doesn't affect the polarity configuration of
the Jack 1/ 4," always being this: TIP-> positive, RING-> negative, SLEEVE-> ground:
The factory setting of the XLR input polarity is: PIN 3 positive, PIN 2 negative and PIN 1
ground. This configuration is same as the other ALTAIR power amplifiers to maintain the
compatibility.
ALTAiR
PROFESSIONAL POWER AMPLIFIERS MF SERIES
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