TOPPING A900 Headphone Amp
Ultra-flagship power, precision, and balance

Product highlights
Six-channel T'ang-ku-la circuit with patented three-stage feedback
Fully balanced differential architecture
22,000mW x2 @16Ω output power
THD+N
SNR/DNR up to 151dB
Balanced relay-based volume control with 0.5dB steps
Six headphone outputs: 6.35mm, 4.4mm, 4-pin XLR, dual 3-pin XLR
Supports independent or simultaneous output configurations
Preamp mode with balanced XLR outputs
Full-color display with customizable modes and colors
Premium Neutrik and Pentaconn connectors
Isolated power supply for analog/digital circuits
Precision-machined aluminum remote control

Specs

A900 Headphone Amplifier Specifications

BAL IN/SE OUT
THD+N @1kHz A-wt:

THD+N @20-20kHz 90kBW:

SNR @MAX OUT 1kHz A-wt: 143dB
Dynamic Range @1kHz A-wt: 143dB
Frequency Response:
20Hz-40kHz (±0.05dB)
10Hz-200kHz (±0.1dB)
Output Level:
30 Vpp @G=L
30 Vpp @G=M
30 Vpp @G=H
AP measured noise level @A-wt:

Actual noise level @A-wt:

Channel Crosstalk @A-wt: -105dB
Input sensitivity:
22.0Vrms @G=L
7.0Vrms @G=M
2.1Vrms @G=H
Gain:
-6.1dB @G=L
+4.3dB @G=M
+13.8dB @G=H
Output Impedance:
Output Power:
6000mW x 2 @16Ω THD+N
3000mW x 2 @32Ω THD+N
1550mW x 2 @64Ω THD+N
660mW x 2 @150Ω THD+N
330mW x 2 @300Ω THD+N
165mW x 2 @600Ω THD+N
Adapter Impedance: >8Ω

BAL IN/BAL OUT
THD+N @1kHz A-wt:

THD+N @20-20kHz 90kBW:

SNR @MAX OUT 1kHz A-wt: 151dB
Dynamic Range @1kHz A-wt: 151dB
Frequency Response:
20Hz-40kHz (±0.05dB)
10Hz-200kHz (±0.1dB)
Output Level:
60 Vpp @G=L
60 Vpp @G=M
60 Vpp @G=H
AP measured noise level @A-wt:

Actual noise level @A-wt:

Channel Crosstalk @A-wt: -153dB
Input sensitivity:
22.0Vrms @G=L
7.0Vrms @G=M
2.1Vrms @G=H
Gain:
-0.1dB @G=L
+10.3dB @G=M
+19.8dB @G=H
Output Impedance:
Output Power:
22000mW x 2 @16Ω THD+N
14000mW x 2 @32Ω THD+N
7000mW x 2 @64Ω THD+N
3000mW x 2 @150Ω THD+N
1500mW x 2 @300Ω THD+N
750mW x 2 @600Ω THD+N