The 7700ADA-AUD Dual Analog Audio Distribution Amplifier is a general purpose amplifier for distributing analog audio signals. It can be operated as two independent 4-output amplifiers for stereo signals, or as a single amplifier with eight outputs where higher fanout is required.

The 7700ADA-AUD can be operated with either differential or single ended inputs and offers a wide range of gain adjustment to handle a wide variety of input signals.


  • Differential and single ended input (automatic single ended to differential conversion)
  • Configurable for stereo (2-1x4) or mono (1x8)
  • High impedance input
  • Low impedance outputs
  • Wide gain adjustment range
  • High common mode range and common mode rejection ratio (CMRR)
  • Very high SNR
  • Very low THD+N
  • Card Edge LEDs
  • Module status/Local fault

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Analog Audio Input
StandardsAny analog audio signal
Number of Inputs2 (Balanced or Single ended)
Connectors3-pin removable terminal strips
Input Step Gain0dB or +6.5dB (configurable with jumpers)
Fine Gain Control-6.5dB to +9.5dB (card edge pot adjustable)
Max Input Level
0dB Input Gain+34dBu
+6.5dB Input Gain+28dBu
Noise Floor-87dBu (0dB input gain), -91dBu (+6.5dB input gain jumper setup)
Common Mode Rejection> 115dB @ 60Hz, 90dB @ 20kHz (tested with +28dBu CM input)
Common Mode Range
0dB Input Gain> ±22V
+6.5dB Input Gain> ±7V
Input impedance0dB gain 33kΩ
+6.5dB gain 18kΩ
Analog Audio Outputs
Number of Outputs
Stereo Mode4 outputs each on left and right channels
Mono Mode8 outputs
Connectors3-pin removable terminal strips
Output Step Gain0, 3.5 or 9.5dB (configurable with jumpers)
Max Output Level+28dBu across hi-impedance load
+24dBm into 600Ω load
Output Impedance66Ω
Frequency Response±0.02dB 20Hz to 20kHz
Stereo Phase Mismatch < 1°@ 20kHz
0dB Input Gain115dB
+6.5dB Input Gain119dB
THD+ Noise0.001% 20Hz to 20kHz @ 28dBu, unweighted RMS, Hi-Z load
0.01% with 600Ω up to 24dBm
Intermodulation Distortion0.001% - SMPTE @ 18dBu
Stereo Crosstalk> 115dB @ 1kHz, > 93dB @ 20kHz
Output Isolation> 110dB @ 1kHz, 100dB @ 20kHz
Voltage+12V DC
Power12 watts
EMI/RFIComplies with FCC Part 15, Class A, EU EMC Directive
Number of Slots1

Ordering Information

7700ADA-AUDBalanced Analog Audio Distribution Amplifier (Configurable 1x8 or 2-1x4)
Ordering Options
NotesRear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+SAStandalone Enclosure Rear Plate
+3RU3RU rear plate for use with 350FR, 7700FR-C, 7800FR or 7801FR Multiframes
350FRPortable Multiframe which holds 7 single slot modules
7700FR-C3RU Multiframe which holds 15 single slot modules
7800FR3RU Multiframe which holds 15 single slot modules
7801FR1RU Multiframe which holds 4 single slot modules
S7701FR7700 Series Standalone Enclosure