DN-474A

2x2-Channel Dual-Impedance Amplifier
(Discontinued Product)


The DN-474A 2x2-Channel Dual-Impedance Amplifier is designed for contractor/install market applications which specify installed speaker systems requiring 70V/100V inputs, and has the added flexibility of handling lo-impedance loads (4Ω/8Ω).  The amplifier is split so that two channels handle the lo-impedance speakers, while two channels take care of the 70V/100V speaker runs. This very versatile, one rack space amplifier has built-in short circuit protection - and LED indicators for signal present, clipping status and thermal interruption on the front panel.  Engineered for the distribution of multiple 70V/100V speaker systems over long cable runs - such as in-ceiling speakers, surface-mount speakers and paging horns, and also for shorter runs to lo-impedance speakers.

  • 4-Channel Class-D amplifier
  • 2 X 120 Watts with 70V/100V outputs
  • 2 X 150/90 Watts with 4/8-ohm loads
  • Euroblock inputs and outputs
  • Separate gain controls for each channel
  • Signal, clipping and thermal interruption indicators
  • Short-circuit and open-circuit protection
  • Total Harmonic Distortion:
    • < 0.1%

  • Frequency Response:
    • 100 Hz - 15 kHz (0 +/-1 dBv)

  • Signal to Noise Ratio:
    • > 95 dB

  • Channel Separation:
    • > 70 dB

  • Input Sensitivity:
    • 0.9 - 1.1 V (0 +/-1 dBv)

  • Input Impedance:
    • 20 kΩ balanced or 10 kΩ unbalanced

  • Connectors
    • (8) Euroblock channel outputs - (2) per channel (70V, 100V, 4Ω, 8Ω)
    • (4) Euroblock channel inputs (ground, -, +)
    • (1) IEC AC power inlet

  • Power
    • Connection:
      • IEC

    • Input Voltage:
      • 100 - 240 VAC, 50/60 Hz


  • Dimensions:
    • 19.0"w x 11.1"d x 1.7"h (483 x 281 x 44mm)

  • Weight:
    • 10.4 lbs (4.7 kg)