Topping A900 – Headphone Amplifier with Record-Breaking Performance
19.07.2025 07:00 | ~1 minute read
Topping has released a truly powerful headphone amplifier – the Topping A900 model develops 2 x 22 W of power into a 16 Ohm load and achieves revolutionary performance – a dynamic range of 151 dB, a signal-to-noise ratio of 151 dB, and a THD+N distortion level across the entire frequency band (90 kHz BW) of 0.00003%!
The Topping A900 features a six-channel fully differential balanced T’ang-ku-la architecture based on a three-stage feedback topology. Thanks to a fully balanced volume control system on electromagnetic relays, the amplifier allows you to precisely control the volume level, keeping distortion at a minimum. The headphone amplifier is capable of providing a powerful output signal even when working with headphones with an impedance of 300 – 600 Ohms.
The Topping A900 is equipped with a built-in fully balanced relay volume control. It effectively reduces crosstalk to -153 dB, providing accurate volume control in 0.5 dB steps. The Topping A900 has a preamplifier functionality, which allows it to be used as part of a full-size stereo system. Headphones can be connected via a 6.35 mm jack, a balanced Pentaconn 4.4 mm, two 4-pin XLR connectors and two 3-pin XLR connectors. The Topping A900 balanced headphone amplifier is available for sale at a suggested retail price of $ 1,199.
Specifications
This product is in the Hi-Fi and High End Electronics and Acoustics database
Headphones amplifiers — TOPPING A900
Model name
A900
Maximum Power, 32 Ohms (mW RMS per channel)
N/A
Maximum Power, 50 Ohms (mW RMS per channel)
N/A
Maximum Power, 300 Ohms (mW RMS per channel)
N/A
Maximum Power, 600 Ohms (mW RMS per channel)
N/A
Frequency response low +/- 3dB (Hz)
N/A
Frequency response high +/- 3dB (Hz)
N/A
Gain (dBu)
N/A
THD (% at 1V RMS, 300 ohms)
0.00003
Signal to Noise Ratio (dB)
151
IMD (%, CCIR, 300 Ohms)
N/A
Crosstalk (dB, 20Hz-20KHz, 300 Ohms)
N/A
Output Impedance (Ohms)
N/A
Dimensions (mm)
200 x 330 x 57
Weight (g)
N/A
Official link
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