ALTAiR
PROFESSIONAL POWER AMPLIFIERS MF SERIES
3
1. INTRODUCTION
Congratulations on your purchase of the ALTAIR power amplifier MF series. Our dilated
experience in the design and manufacture of great power amplifiers culminate with the pre-
sentation of this new generation of amplifiers MF series.
There is a lot the characteristics that make of the ALTAIR power amplifiers MF series,
one of the most highlighted of the audio professional market, here enumerated some:
Flexibility in the input connections
They had a input system that is configured by means of a panel that integrates two XLR
connectors male-female per channel (a female XLR + Jack in the models MF8 MF12 over the
own chassis) and a switch of work mode. By means of this system, one could change the
polarity and the sensibility of the power amplifier in order to allow its integration in any sound
system. This segregation of the elements corresponding to the input signal opens the possibil-
ity of incorporating remote control circuits easily, crossovers, as well as simplify the mainte-
nance works .
Multiple protection
As global protection, incorporates turn on switches with thermal breaker (models MF16
MF24). These switches, located at the front panel substitute to the old fuses with the rising
advantages: its holds their own curve indefinitely, it that is unchanged with the temperature,
show the shooting by means of the lever state and avoids locating and substitute the typical
blended fuse.
Has improved the circuits of DC output protection with the incorporation of CROW-BAR
circuits or solid state relays. The conventional relays incorporate contacts associated with
electromechanical elements that with the time are subject to failures. This is no longer with the
solid state device. Guiding directly the power transistors output to the loudspeakers binding
post has improved several qualities of the signal quality, the damping factor and the global
reliability.
Equally, the conventional thermal switches (based on contacts) has been substituted of
the power modules by solid state sensors whose information completes the double condition
of speed fan control and discharge the thermal protection.
The power supply transformer is protected also in front of excessive heating, discon-
necting both inputs until their normal temperature of operation is reached.
All the protection situations are displayed in the power amplifier front panel.
Clipping circuit limiter
Since most of the damage caused to loudspeakers, and even in the power amplifiers,
is normally the result of the permanence of the power unit during long periods of time in
clipping, it is necessary to be able to have limiter mechanisms that assure their reliable opera-
tion.
