Topping A50 Headphone Amplifier

The TOPPING A50 Headphone Amplifier produces an output power of 2200 mW and has an optional gain settings of 0dB/9dB that can power a wide variety of headphones. It also comes with an ultra-wide frequency response of 20Hz-200kHz that exceeds both CDs and the Hi-Res certification to provide you with a detailed music performance.

The A50 is built out of CNC Aluminum with a thermal conductive column to dissipate heat from the power supply and OP-Amp through the entire outer casing. On the front, it is equipped with single-end and balanced headphone outputs - 6.35mm single end, 3.5mm single end, and 2.5mm balanced headphone jacks. On the rear, it has an RCA input and an RCA output.

Two OP-Amps LME49720 are included with sockets in the A50 for DIYers to switch them up to produce a different kind of sound and the power of A50 is stabilized by TI TPS7A33/47 low-noise linear regulator. To fix the problem of unbalanced small volume and reliability after long-time use, the A50 digitizes the volume knob position and transmits the data to the JRC1195 for precision volume controlling. Finally, the A50 amplifier can be combined with the TOPPING D50s DAC and the P50 Linear Power Supply to create a comprehensive audio setup with top sound reproduction.

Specs:

• THD+N @ A-wt
• 3.5mm/6.35mm Single Ended Headphone Jack
• <0.0006% @ 1kHz, Output= 100mW (32 ohms)
• <0.0015% @ 20Hz-20kHz, Output= 100mW (32 ohms)
• <0.0006% @ 1kHz, Output= 12mW (300 ohms)
• <0.0006% @ 20Hz-20kHz, Output= 12mW (300 ohms)
• 2.5mm Balanced Headphone Jack
• <0.0016% @ 1kHz, Output= 100mW (32 ohms)
• <0.0022% @ 20Hz-20kHz, Output= 100mW (32 ohms)
• <0.0004% @ 1kHz, Output= 50mW (300 ohms)
• <0.0004% @ 20Hz-20kHz, Output= 50mW (300 ohms)
• SNR @ A-wt
• 3.5mm/6.35mm Single Ended Headphone Jack
• 123dB @ 1kHz
• 2.5mm Balanced Headphone Jack
• 123dB @ 1kHz
• Dynamic Range @ A-wt
• 3.5mm/6.35mm Single Ended Headphone Jack
• 123dB @ 1kHz
• 2.5mm Balanced Headphone Jack
• 123dB @ 1kHz
• Frequency Response
• 3.5mm/6.35mm Single Ended Headphone Jack
• 20Hz - 20kHz (+/- 0.6dB)
• 20Hz - 40kHz (+/- 0.6dB)
• 2.5mm Balanced Headphone Jack
• 20Hz - 20kHz (+/- 0.6dB)
• 20Hz - 40kHz (+/- 0.6dB)
• Output Level
• 3.5mm/6.35mm Single Ended Headphone Jack
• 10.6 Vpp @ G=L
• 20.0 Vpp @ G=H
• 2.5mm Balanced Headphone Jack
• 21.4 Vpp @ G=L
• 40.0 Vpp @ G=H
• Noise @ A-wt
• 3.5mm/6.35mm Single Ended Headphone Jack
• <3.0 uVrms @ G=L
• <5.0 uVrms @ G=H
• 2.5mm Balanced Headphone Jack
• <5.0 uVrms @ G=L
• <10.0 uVrms @ G=H
• Output Impedance
• 3.5mm/6.35mm Single Ended Headphone Jack
• <4.7 ohms
• 2.5mm Balanced Headphone Jack
• <9.4 ohms
• Output Power
• 3.5mm/6.35mm Single Ended Headphone Jack
• 1110 mW x 2 @ 32 ohms, THD+N <1%
• 160 mW x 2 @ 300 ohms, THD+N <1%
• 2.5mm Balanced Headphone Jack
• 2200 mW x 2 @ 64 ohms, THD+N <1%
• 640 mW x 2 @ 300 ohms, THD+N <1%
• Impedance Matching
• 3.5mm/6.35mm Single Ended Headphone Jack
• 16 - 300 ohms
• 2.5mm Balanced Headphone Jack
• 16 - 600 ohms
• Size: 11 x 12.3 x 2.6 cm (l x w x h)

Included:

• TOPPING A50 Headphone Amplifier x 1
• 15V1A Adapter x 1
• User Manual x 1
• Warranty Card x 1