AAA-3131:   5 Stereo (10 mono) Analogue Audio Distribution Amplifier.

FEATURES:

      Selectable stereo or mono mode.
      Balanced inputs and outputs.
      Front panel monitoring Bantam jacks.
      LED audio activity indicators.
      Front panel gain adjustments.
      Selectable gain ranges: +6 dB, +12 dB & +18 dB.
      Maximum output level +24 dBu.

Brochure  

User Manual  

GENERAL:

The IRT AAA-3131 is a high performance audio distribution amplifier that can be used for either mono or stereo signals.

Inputs and outputs are balanced connector types, which can be wired for unbalanced operation, if needed, for duplicating applications.

Front panel access is provided for the gain adjustment of Left and Right channels from zero output to the maximum of the selected gain range.

LED's on the front panel indicate the presence of audio on each channel and balanced output bantam jacks are provided for front panel monitoring.

The AAA-3131 is fabricated in IRT's standard Eurocard format and may be housed in a variety of IRT Eurocard frames alongside other standard modules.


TECHNICAL SPECIFICATIONS:

Inputs: Left/Mono and Right
Type
Tranformerless, balanced, bridging.
Impedance
 > 10 kΩ.
Maximimum Input Level
+24 dBu (6dB gain mode).
Input CMR
> 55dB, 20 Hz to 20kHz.

Outputs:
Main: (Located on rear assembly)
Type
Transformerless, balanced.
Number
10 (10 mono or 5 L and 5 R).
Impedance
< 40 Ω.
Maximum output level
+24 dBu into 600 Ω.
Maximum output loading
10 x 600 Ω or up to 26 High Z.
DC on output
< ±20 mV.

Monitoring: (Located on front panel)
Type
Transformerless, balanced.
Number
2 (L and R) Bantam Jack.
Impedance
< 70 Ω.
Maximum output level
+24 dBu into 600 Ω.
Minimum output load
1 kΩ.
DC on output
< ±20 mV.

Indicators:
Audio activity
2 front panel LED's set for +4 dBu @ 1 kHz (user adjustable).

Performance:
Gain
Internally linked to a maximum gain of +6, +12 or +18 dB.
Frequency response
+0/-0.3 dB for 20 Hz to 20 kHz.
Harmonic distortion
< 0.005%, 20 Hz to 20 kHz at +20 dBm.
Noise
-110 dB, Ref. +24 dBm, 20 Hz to 20 kHz.
Crosstalk         Left/Right
-75 dB, 20 Hz to 20 kHz.
                       Amplifier/Amplifier
-80 dB, 20 Hz to 20 kHz.

Power Requirements:
Voltage
28 Vac CT (14-0-14) or ±16 Vdc.
Power consumption
< 5 VA.

Connectors:
Phoenix pluggable screw block.

Other:
Temperature range
0 - 50°C ambient.
Mechanical
Suitable for mounting in IRT 19" rack chassis with all connections at the rear.
Finish:             Front panel
Grey background, black lettering & red IRT logo.
                       Rear assembly
Detachable silk-screened PCB with direct mount connectors to Eurocard and external signals.
Dimensions
6 HP x 3 U x 220 mm IRT Eurocard.
Supplied accessories
Rear connector assembly with Phoenix pluggable compression screw terminals. Matching connectors for audio inputs & outputs supplied.



           
Due to our policy of continuing development, these specifications are subject to change without notice.