DA-4X4B Distribution Amplifier

List: $595.00


SKU: RAD-DA4X4B Categories: , Tag:


DA-4X4B Distribution Amplifier


Radio Systems’ DA-4x4b may be the best DA ever made. We’ve lowered the noise to a whisper at 102 dB below +4 dBm out with an internal toroidal transformer that dramatically reduces internal electrical interference fields. Distortion in the DA-4x4b is so low that it is hard to measure as a result of low noise op-amps and a careful design of the output amplifiers.



  • Versatile configurations- quad, stereo or mono
  • Front panel individual output level sets
  • Internal torroidal transformer
  • Super-low noise and distortion specifications
  • Individual rear panel removable I/O barrier strip connectors
  • 110/220 volt - CE certified
  • Front panel audio presence and overload LED indicators
  • Also available: DA-2x4b with stereo and mono configurations



4 inputs x 4 outputs (DA-4x4b)
Front Panel Indicators
Power, audio level illuminates at -24 dBm
(one per input channel), peak level illuminates at
+ 24 dBm (one per input channel)
Input Impedance:
40K ohms, balanced and bridging
Input Gain
0 to +36 dB (16 dB, 26 dB, 36 dB – jumper selectable)
Output Impedance
60 ohms, balanced
Maximum Output Level
+25 dBm (into 600 ohm load)
Frequency Response:
+0/-.1 dB 20 Hz to 20 kHz
(thd + n): .002% 20 Hz to 20 kHz
(any output level into 600 ohm load)
(SMPTE imd): .003% (any output level into 600 ohm load)
(dim) .002% (into 600 ohm load)
102 dB below +4 dBm (full bandwidth into 600 ohm load)
Output Channel Isolation (crosstalk)
-105 dB (full bandwidth)
Dynamic Range
123 dB
21 dB above +4 dBm output (into 600 ohm load)
Common Mode Rejection
-50 dB (full bandwidth)
19 inch (EIA rack mount) wide x 1.75 inches (1ru) high x 7.75 inches deep (with connectors)
Shipping Weight
8 pounds