RA53 Stereo Headphone Amplifier Connection Schematic

This stereo headphone amplifier device may provide up to ten channels of headphone monitoring if a 1/4” Link Input/Output jack is provided for connecting two RA53 units together. The schematic below illustrates a possible operation for this RA53 stereo headphone amplifier.
As you can see, the headphones are connected to the outputs on the front panel side, when the others to the rear panel. Another connection possibility can be:

1. The Left and Right Inputs to the RA53 are connected to the mixer’s sub outputs, but could be connected to auxiliary sends or even main outputs.
2. The RCA Auxiliary Inputs are connected to a playback deck.
3. For individual monitoring, a stereo TRS connector could be plugged into a stereo
auxiliary send from the mixer to an Insert jack on the RA53. This way, different
material may be monitored on Channels 1 and/or 2 than that of the main inputs.

RA53 Stereo Headphone Amplifier Schematic Diagram

This isthe schematic diagram ofRollsRA53 Stereo Headphone Amplifier Circuit, the five-channel headphone amplifierwith a variety of input options.
The herein are specifications ofRollsRA53 Stereo Headphone Amplifier:
Input Impedance:                10 KW
Max Input Level:                  18 dBV
Max Gain:                             26 dB per channel
Maximum Output Power:     300 mW per channel
Output Impedance:              10 W
S/N Ratio:                             >90 dB
THD:                            <.08%
IMD (SMPTE):               <.08%
Power:                         12 VAC
Size:                             8.4” x 1.7” x 5” (21.3 x 4.3 x 13 cm)
Weight:                        2.5 lbs (1.14 kg)
The RA53 Stereo Headphone Amplifier Circuit has lot of gain to be operated in noisy environment and works with any headphone impedance.
Source: http://www.hqew.net/circuit-diagram/RA53-Stereo-Headphone-Amplifier-Schematic-Diagram_5823.html