Rane MA3 3 channel PA speaker amp amplifier

Description

Tested and works perfect.
Listed is a Rane
MA 3
that has been professional used and isno longer needed due to the project being cancelled.
The Rane
MA 3
is athree-channel amplifier designed to operate in commercial environments, such aspaging, foreground music and background music distribution. Up to threeoptional 40 watt, 70.7 volt or 100 volt constant-voltage audio transformers maybe installed inside the amplifier, eliminating the need for external wiring ortransformer mounting.
The
MA 3
uses aconventional linear power supply with toroidal transformer. This configurationminimizes the emissions associated with switching supplies and noisiertransformer designs. The power supply features independent secondary suppliesfor each channel, minimizing load regulation interaction and crosstalk.
Thermal management is accomplished in the
MA 3
with a sealed heat-tunnel design incorporating lowvelocity forced air and large aperture openings. This design minimizes thenoise usually associated with forced air-cooling and eliminates the need for anair filter. Forced air-cooling allows the amplifier to operate reliably inharsh environments and avoid the buildup of heat in unventilated racksassociated with passive convection cooling.
Dynamic protection circuitry completely safeguards each channelagainst over-voltage, under-voltage, overloads, transients from inductiveloads, thermal runaway and instantaneous temperature peaks. Biasing is notallowed to occur when an under-voltage condition exists, reducing turn on andturn off transients. Fast-response limiters allow the
MA 3
to tolerate up to 20dB of overdrive into 8 and 4 ohm loadswhile holding THD below 1 percent. This means no loss of speech intelligibilityor harsh clipping, and greatly increases the dynamic range of the system withoutthe use of external limiters.
The peak-responding, load-adaptive meters of the
MA 3
accurately indicate the remaining headroom. The meters arehelpful in setting system levels and indicating signal compression. Internallyselectable 80Hz high-pass filters offer protection against over excursion ofsmall bookshelf speakers and saturation of distribution transformers at lowfrequencies.
Three independent amplifiers in a single enclosure
Load sensitive dynamic limiters and headroom meters
High capacity linear power supply
Separate input level controls on the back panel allow convenientlevel balancing of all channels
Sealed heat-tunnel forced air cooling
80Hz high-pass filter selection
SPiKe Protection Circuitry
Safeguards each channel against over-voltage, under-voltage,overloads, transients from inductive loads, thermal runaway and instantaneoustemperature peaks