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MDA-450

4 x 50W HIGH EFFICIENCY DIGITAL AMPLIFIER

INTRODUCTION

The Absolute Acoustics® MDA-450 is a 4-channel digital amplifier that delivers 50W of continuous power @ 8Ohms or even more when used at lower impedance ratios or bridge mode. Its heart is powered by high quality digital amplification modules, valuing sound quality and unmatched robustness.

 

 

For ease of installation, the audio source for each channel can be selected either from a global input or direct channel input. The unit can be controlled directly through the main power switch on its front panel, through a trigger input located on the rear panel or automatically, sensing the audio signal.

 

KEY FEATURES

50 REAL

WATTS


Each channel provides 50W RMS of continuous power into 8 ohms, or 70W RMS into 4 Ohms, more than enough to feed high quality whole-house audio systems.

DIGITAL
AMPLIFIER

 

The MDA-450 uses Class-D amplification modules, operating coolly and with an efficiency of superior to 90%. They are also compact and lightweight.

UNMATCHED
SOUND QUALITY


Ultra-low distortion amplifying circuits provide clean and precise audio, even at high listening volumes.

MORE
POWER

 

In Bridge mode, the output from adjacent channels can be combined to deliver even more power, up to 120W RMS.

LOOP
OUTPUTS

 

“Loop” outputs allows the transmission of the input signal to the next amplifier, making easier the integration between multiple units.

COMPACT

SIZE

 

All this technology is embedded in a compact 1U chassis, which makes the installation easier in furniture or professional racks.

DESCRIPTION

1. Main power switch

2. Power status indicator

3. Channel protection indicators

4. Gain adjustment knobs

5.12V DC trigger output

6. 3-24V DC trigger input

7. Power on mode selector switch

8. Channel audio in/out connectors

9. Bridge mode selector switch

10. Channel speaker outputs

11. AC power inlet

TECH SPECS

  • NUMBER OF CHANNELS: 4 independent channels
  • POWER OUTPUT (8 OHMS): 50W RMS per channel
  • POWER OUTPUT (4 OHMS): 70W RMS per channel
  • POWER OUTPUT (BRIDGE MODE): 140W RMS (*)
  • output impedance: 4 - 8 Ohms
  • Input sensitivity: 1V for 50W @ 1kHz 8 Ohm
  • Input impedance: 12 kOhms
  • FREQUENCY RESPONSE: 20Hz - 43kHz
  • TOTAL HARMONIC DISTORTION: 0.1% 20Hz - 20kHz @ 8 Ohms
  • SIGNAL-TO-NOISE RATIO: 98dB
  • OPERATING TEMPERATURE:  32° - 104° F (0° - 40°C)
  • POWER SUPPLY: 115/230V AC with internal switch
  • FUSE rating: T6.3AL/250V (115V) / T3.15AL/250V (230V)
  • CONSUMPTION: 450W
  • DIMENSIONS: 17.13” (L) x 1.75” (H) x 13.19” (W) (435mm x 45mm x335mm)
  • WEIGHT: 9.92lb (4.5kg)
  • WARRANTY: 2 years limited warranty
  • CERTIFICATIONS: UL, FCC, CE

*  Bridge mode is only available at 8 Ohms impedance.

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