This is the schematic diagram of Rolls RA53 Stereo Headphone Amplifier Circuit, the five-channel headphone amplifier
with a variety of input options.
The herein are specifications of Rolls RA53 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
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.