Rane MA 4 Datasheet
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Rane MA 4 Datasheet

Rane MA 4 Datasheet

Multichannel amplifier
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General Description

The 100 watt per channel, four-channel MA 4 amplifier achieves
unparalleled power density, reliability and features in a space
saving 1U, 19 inch rack mount chassis weighing only eight
pounds (3.6 kg). A universal-voltage switching power supply
provides near perfect Power-Factor, reducing peak currents to
⅓ compared to non power-factor-corrected supplies. A long list
of unique features ranging from constant load power to built in
automatic redundancy switching to advanced dynamics control,
qualify the MA 4 for the most demanding fixed installation
applications. The MA 4 excels in music & paging systems, small
conference rooms and speech reinforcement applications requir-
ing multiple amplifiers. Advanced dynamics control algorithms
adapt to changes in temperature, load impedance and sensitivity
setting. The result is a truly plug-and-play amplifier that ensures
excellent signal integrity at all times.
Accessories
MT 4
MADE IN U.S.A.
RANE CORP.
MT 4 Multichannel Transformer provides 100V or 70.7V constant-voltage distribution.
DATA SHEET
4
3
IN
OUT
IN
OUT
+
– 100V 70V COM
+
– 100V 70V COM
+
– 100V 70V COM
+
– 100V 70V COM
IN
OUT
IN
OUT
Features
• Universal voltage, power-factor-corrected power supply
• Very low inrush current
• 100 watts x 4 channels in 1U chassis
• Built-in load monitoring
• Remote fault reporting and redundancy switching
• Optional 4 channel 70/100 volt transformers in 1U chassis
• Adjustable high-pass filters and remote level controllable
• Advanced dynamics control adjusts for sensitivity setting, load Z
and temperature
2
1
IN
OUT
IN
OUT
+
– 100V 70V COM
+
– 100V 70V COM
+
– 100V 70V COM
+
– 100V 70V COM
IN
OUT
IN
OUT
MULTICHANNEL AMPLIFIER
MT 4
MULTICHANNEL
TRANSFORMER
VR 2 Volume Remotes
can control the level from
within each zone.
MA 4
LEVEL
4
6
2
8
0
10
Data Sheet-1

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Summary of Contents for Rane MA 4

  • Page 1: General Description

    • Optional 4 channel 70/100 volt transformers in 1U chassis qualify the MA 4 for the most demanding fixed installation applications. The MA 4 excels in music & paging systems, small • Adjustable high-pass filters and remote level controllable conference rooms and speech reinforcement applications requir- •...

  • Page 2: Specifications

    MA 4 MULTICHANNEL AMPLIFIER Specifications Parameter Specification Conditions/Comments Input impedance 10 kΩ Each leg, differential, 1 kHz Maximum input +22 dBu Sensitivity range/resolution +22 to +4 dBu 256 steps Remote level control range/resolution Attenuate only; 0 dB to –80 dB...
  • Page 3 SENSITIVITY SENSITIVITY 80Hz LOAD LOAD LOAD LOAD Active Low Use Rane VR 2 or 20 k pot MASTER COMP + – + – + – + – + – + – + – + – SLAVE + – + –...

  • Page 4: Block Diagram

    MA 4 MULTICHANNEL AMPLIFIER Block Diagram POWER-FACTOR- SWITCH-MODE CORRECTION POWER SUPPLY COMBINATION CONTROLLER Data Sheet-4...

  • Page 5: Low Voltage

    MA 4 MULTICHANNEL AMPLIFIER LOW VOLTAGE FLYBACK DETECT OUTPUT LEVEL DETECT OUTPUT LEVEL DETECT OUTPUT LEVEL DETECT OUTPUT LEVEL ± ( COMP ON/OFF EXP ON/OFF Data Sheet-5...

  • Page 6: Architectural Specifications

    -order Butterworth filters. Load sensitive be provided. limiter circuits shall prevent clipping and the associated loss of The unit shall be a Rane Corporation Model MA 4. speech intelligibility. A front panel LED shall indicate limiter activity within each channel.

  • Page 7: Basic Application

    MA 4 MULTICHANNEL AMPLIFIER Basic Application Don't let those extra connections and switches intimidate you. The MA 4 is a high-quality general-purpose amplifier and connects like any other. MA 4 OUTPUTS MODE INPUTS MADE IN U.S.A. COMMERCIAL AUDIO Class 2 Wiring HIGH-PASS RANE CORP.
  • Page 8 (+5 volts) during normal operation and goes low (passive pull down) when a fault occurs. For information about Fault Flag operation (applications and reported faults) see the Manual, page 3. Remote Level Control inputs are provided for each channel. The Rane VR 2 or any 10k to 100 kΩ potentiometer may be con- nected to these inputs.

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