Balanced / Single-ended connectivity
For its connectivity, the A50 is both simple and very efficient. It integrates a single stereo RCA input but has 3 headphone outputs, one of which is balanced on a 2.5mm jack connector. A stereo RCA line output is also available on the back of the unit.
The components of the A50 Topping are hidden under a beautiful and robust CNC machined Aluminium housing. It is also designed to effectively dissipate the heat released by the power supply and PDOs.
The A50 scans the position of the volume knob and transmits the data to the JRC1195 controller for a precise adjustment of the volume level. This chip also provides a perfect volume balance between the left and right channels.
The amplifier includes a pair of LME49720 PDOs mounted on a DIP8 bracket. It is therefore possible to easily replace these PDOs to adapt the sound reproduction to your listening experience.
Regulated power supply
The power supply circuit of the A50 is stabilized by low noise TI TPS7A33/47 linear regulators. These high-performance chips provide clean and stable power to all A50 circuits.
A50 Headphone amplifier + P50 Power supply + D50s DAC Association
The Topping A50 completes the range also composed of the P50 and D50s. The combination of these products is ideal and allows you to benefit from a complete and efficient system. The D50s DAC allows efficient digital-to-analog conversion, supports high-resolution files and allows Bluetooth transmission. The ultra-low noise regulated linear power supply P50 will provide the A50 and D50s with an extremely clean power supply, allowing them to reach their full potential.
|Product type||Headphone amplifier|
|Input||1x Stereo RCA|
|Outputs||1x Stereo RCA
1x Single-ended Jack 3.5mm headphone output
1x Single-ended Jack 6.35mm headphone output
1x Balanced Jack 2.5mm headphone output
|THD+N : Single-ended output (@ A-Weighting)||< 0.0006% @ 1kHz, 100mW 32Ω
< 0.0015% @ 20Hz – 20kHz, 100mW 32Ω
< 0.0006% @ 1kHz, 12mW 300Ω
< 0.0006% @ 20Hz – 20kHz, 12mW 300Ω
|THD+N : Balanced output (@ A-Weighting)||< 0.0016 @ 1kHz, 100mW 32Ω
< 0.0022% @ 20Hz – 20kHz, 100mW 32Ω
< 0.0004% @ 1kHz, 50mW 300Ω
< 0.0004% @ 20Hz – 20kHz, 50mW 300Ω
|SNR (@ A-Weighting)||123dB @ 1kHz|
|Dynamic range (@ A-Weighting)||123dB @ 1kHz|
|Frequency response||Gain 0dB : 20Hz – 20kHz ±0.6dB
Gain 9dB : 20Hz – 40kHz ±0.6dB
|Output level||Single-ended, Gain 0dB : 10.6Vpp
Single-ended, Gain 9dB : 20Vpp
Balanced, Gain 0dB : 21.4Vpp
Balanced, Gain 9dB : 40Vpp
|Noise (@ A-Weighting)||Single-ended, Gain 0dB : < 3µVrms
Single-ended, Gain 9dB : < 5µVrms
Balanced, Gain 0dB : < 5µVrms
Balanced, Gain 9dB : < 10µVrms
|Output impedance||Single-ended : < 4.7Ω
Balanced : < 9.4Ω
|Output power||Single-ended, Gain 0dB : 2x 1110mW @ 32Ω, THD+N < 1%
Single-ended, Gain 9dB : 2x 160mW @ 300Ω, THD+N < 1%
Balanced, Gain 0dB : 2x 2200mW @ 64Ω, THD+N < 1%
Balanced, Gain 9dB : 2x 640mW @ 300Ω, THD+N < 1%
|Compatible headphone impedance||Single-ended : 16-300Ω
Balanced : 16-600Ω
|Dimensions||11 x 12.3 x 2.6cm|
|Package||1x Topping A50
1x Power supply