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TOPPING A900 Headphone Amplifier Preamplifier

The Topping A900 is a high-end headphone amplifier and preamplifier, combining power, performance and design. It benefits from T'ang-ku-la's proprietary balanced amplification architecture, enabling it to develop significant power, making it capable of accompanying the vast majority of audio headphones. What's more, in addition to its exceptional measurements, the A900 boasts a particularly comprehensive connectivity package to meet a wide range of needs.

Average votes for this product
5.0 / 5
  Based on 2 customers reviews.

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Reference : 20962
New product

1 199,00 €tax incl.

999,17 € tax excl.
Including 0,05 € for green tax

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Shipping date: 25-12-2025.

Orders placed before 12h (GMT+1) will generally be shipped the same day (working day).

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Facturation France
SAV France

2 Years warranty

Accessories for this product

Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.

 
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Topping A900 Balanced Headphone Amplifier Preamplifier

Topping A900: Front view

The Topping A900 is a high-end headphone amplifier and preamplifier, combining power, performance and design. It benefits from T'ang-ku-la's proprietary balanced amplification architecture, enabling it to develop significant power, making it capable of accompanying the vast majority of audio headphones. What's more, in addition to its exceptional measurements, the A900 boasts a particularly comprehensive connectivity package to meet a wide range of needs.
Topping A900: Key features

Topping A900: Optimized T'ang-ku-la amplification architecture

T'ang-ku-la's proprietary amplification architecture adopts a new three-stage feedback circuit (patented technology), effectively reducing circuit noise and high-frequency distortion, further improving dynamic range to an incredible 151dB, and full-band THD (90kBw) to 0.00003%. What's more, this new technology effectively reduces the creation of circuit heat, improving reliability and extending the device's durability.

The three T'ang-ku-la modules form a balanced six-channel architecture, maintaining a balanced signal from source to output. The headphone amplifier is capable of delivering up to 2x 22000mW of power at 16Ω.

Topping A900: T'ang-ku-la amplifier modules

Topping A900: Modern design

The Topping A900 is clad in a superb aluminum chassis, both robust and modern, a combination of angles and lines recalling the technical rigor of this device.

Topping A900: Robust, modern chassis

Topping A900: Numerous inputs

The rear panel of the Topping A900 incorporates high-quality Neutrik connectors, offering three groups of balanced stereo combo inputs (XLR + 6.35mm jack). This design ensures broad compatibility with a wide range of professional audio equipment, adapting to both audiophile and studio use.

Topping A900: Inputs

Topping A900: Outputs for every use

The A900 is equipped with numerous front-panel headphone outputs, providing six physical connectors: two XLR (balanced) / Jack 6.35mm (unbalanced) combo outputs, two balanced XLR 4-pin outputs and two balanced Jack 4.4mm outputs. These outputs use high-quality Neutrik and Pentaconn connectors. The outputs can be configured as independent or simultaneous.

Topping A900: Headphone outputs
Topping A900 : Combinaison avec D900

Topping A900: Preamplifier outputs

The Topping A900 also features a preamplifier output and offers a dedicated pure preamplifier mode. As a preamplifier, the A900 benefits from similar measurements to the headphone amplifier section, with a THD+N of less than 0.000055%, making it an ideal companion for a power amplifier, to enjoy incredibly faithful sound reproduction.

Topping A900: Intuitive control

A two-inch color display shows playback information in real time. On the right, three capacitive buttons work seamlessly with the volume knob for intuitive control. The latter not only offers precise volume control, but also benefits from a function that can be customized to suit your preferences.

Topping A900: Display and controls

Topping A900: Many display modes

The A900 allows you to easily select from several display modes, such as playback information, FFT spectrum or vumeter. The device also offers six background colors, so you can adapt the interface to your aesthetic preferences.

Topping A900: Many display modes

Topping A900: Premium remote control

The Topping A900 comes with a remote control designed in a single block of aluminum alloy using high-precision CNC (numerical control) and finely sandblasted. As a result, this remote control is both robust and stylish.

Topping A900: Remote control

Topping A900: Balanced relay volume control

The A900 features a balanced relay volume control system, reducing crosstalk to -153dB. This provides exceptional sonic purity and channel separation for a breathtaking musical experience. Volume control is in 0.5dB steps for smooth sound level changes.

Topping A900: Relay volume control

Topping A900: Isolated power supply

The power supply for the digital processing circuit is physically isolated from the two analog amplifier circuits, delivering a more stable voltage and effectively reducing interference.

Topping A900: Isolated power supply

Topping A900: An incredible combination with the D900

The Topping A900 forms a perfect duo with the Topping D900 DAC. This ensemble offers both exceptional performance and extensive connectivity.

The Topping D900 is sold separately.

Topping A900: Combination with D900

Topping A900 overview

Topping A900: Diagram
1Balanced XLR 4 pins headphone output
2Screen
3Menu
4Volume knob and customizable function
5XLR (balanced) / Jack 6.35mm (single-ended) combo headphone output
6Balanced Jack 4.4mm headphone output
7Input selection button
8Home page button
9Remote control receiver
1012V trigger
113x XLR / Jack 6.35mm combo inputs
12Firmware update port

Technical characteristics

Specifications
Product typeHeadphone amplifier
Preamplifier
Inputs3x combo XLR (balanced) / Jack 6.35mm (single-ended)
Outputs2x Combo XLR (balanced) / Jack 6.35mm (single-ended) combo headphone output
2x Balanced XLR 4 pins headphone output
2x Balanced Jack 4.4mm headphone output
1x Balanced XLR pre-out
Headphone amplifier measurements
Balanced input / Single-ended outputBalanced input / Balanced output
THD+N @ 1kHz, A-wt< 0.00006% @ 500mW, 32Ω
< 0.000055% @ 80mW, 300Ω		< 0.00006% @ 500mW, 32Ω
< 0.000055% @ 80mW, 300Ω
THD+N @ 20-20kHz, 90kBW< 0.00006% @ 500mW, 32Ω
< 0.00005% @ 80mW, 300Ω		< 0.00004% @ 500mW, 32Ω
< 0.00003% @ 80mW, 300Ω
SNR @ Max out, 1kHz, A-wt143dB151dB
Dynamic range @ 1kHz, A-wt143dB151dB
Frequency response20Hz-40kHz (±0.05dB)
10Hz-200kHz (±0.1dB)		20Hz-40kHz (±0.05dB)
10Hz-200kHz (±0.1dB)
Output level30Vpp @ G=L
30Vpp @ G=M
30Vpp @ G=H		60Vpp @ G=L
60Vpp @ G=M
60Vpp @ G=H
Audio Precision noise level @ A-wt< 0.7µVrms @ G=L
< 0.9µVrms @ G=M
< 1.5µVrms @ G=H		< 0.7µVrms @ G=L
< 1.2µVrms @ G=M
< 2.5µVrms @ G=H
Effective noise level @ A-wt< 0.3µVrms @ G=L
< 0.7µVrms @ G=M
< 1.4µVrms @ G=H		< 0.3µVrms @ G=L
< 1.0µVrms @ G=M
< 2.3µVrms @ G=H
Crosstalk @ A-wt-105dB-153dB
Input sensitivity22.0Vrms @ G=L
7.0Vrms @ G=M
2.1Vrms @ G=H		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		-0.1dB @ G=L
+10.3dB @ G=M
+19.8dB @ G=H
Output impedance< 0.1Ω< 0.1Ω
Output power2x 6000mW @ 16Ω, THD+N <0.1%
2x 3000mW @ 32Ω, THD+N <0.1%
2x 1550mW @ 64Ω, THD+N <0.1%
2x 660mW @ 150Ω, THD+N <0.1%
2x 330mW @ 300Ω, THD+N <0.1%
2x 165mW @ 600Ω, THD+N <0.1%		2x 22000mW @ 16Ω, THD+N <0.1%
2x 14000mW @ 32Ω, THD+N <0.1%
2x 7000mW @ 64Ω, THD+N <0.1%
2x 3000mW @ 150Ω, THD+N <0.1%
2x 1500mW @ 300Ω, THD+N <0.1%
2x 750mW @ 600Ω, THD+N <0.1%
Adapter impedance> 8Ω
Preamplifier measurements
THD+N @ 1kHz, A-wt< 0.000055%
THD+N @ 1kHz, A-wt< 0.00003%
SNR @ Max out, 1kHz, A-wt151dB
Dynamic range @ 1kHz, A-wt151dB
Frequency response20Hz-40kHz (±0.05dB)
20Hz-200kHz (±0.1dB)
Output level60Vpp @ G=L
60Vpp @ G=M
60Vpp @ G=H
Audio Precision noise level @ A-wt< 0.7µVrms @ G=L
< 1.2µVrms @ G=M
< 2.5µVrms @ G=H
Effective noise level @ A-wt< 0.3µVrms @ G=L
< 1.0µVrms @ G=M
< 2.3µVrms @ G=H
Crosstalk-153dB
Input sensitivity22.0Vrms @ G=L
7.0Vrms @ G=M
2.1Vrms @ G=H
Gain-0.1dB @ G=L
+10.3dB @ G=M
+19.8dB @ G=H
Output impedance100Ω
General
ColorSilver
Dimensions (W x D x H)33 x 20 x 5.7cm
Package1x Topping A900
1x Remote control
1x Power cable
Topping A900: THD+N and SNR measurements Topping A900: DNR and THD+N measurements Topping A900 : THD and frequency response measurements Topping A900: THD+N and SNR measurements Topping A900: THD, frequency response and FFT measurements
 
Data sheet
InputXLR
InputJack 6.35mm
OutputJack 6.35mm
OutputXLR
OutputJack 4.4mm
ColorSilver
ClassN/A
Remote ControlYes
 
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Average votes
5.0 / 5
2 reviews
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 5/5
Date :
Vraiment excellent !
Ce TOPPING A900 est vraiment excellent !
Faites le fonctionner une quarantaine d'heures avant de le juger vraiment et vous constaterez que le son devient plus précis et avec beaucoup de détails supplémentaires.
Donner lui surtout de bon enregistrement à transmettre car les mauvais se remarquent de suite ..
Je lui ai commandé toujours chez AUDIOPHONICS un câble "Symétrique pour Casque Jack 4.4mm vers 2x Jack 3.5mm Cuivre OCC Plaqué Argent 3m" Référence : 19410 et le son est remarquable de détails et de précision, câble bien supérieur à ceux en ma possession.
Voila mon avis et bonne écoute à tous les audiophiles.
 (0)
 (0)
This review has been posted for TOPPING A900 Balanced Headphone Amplifier Preamplifier
Note :
 5/5
Date :
Vraiment excellent !
Ce TOPPING A900 est vraiment excellent !
Faites le fonctionner une quarantaine d'heures avant de le juger vraiment et vous constaterez que le son devient plus précis et avec beaucoup de détails supplémentaires.
Donner lui surtout de bon enregistrement à transmettre car les mauvais se remarquent de suite ..
Je lui ai commandé toujours chez AUDIOPHONICS un câble "Symétrique pour Casque Jack 4.4mm vers 2x Jack 3.5mm Cuivre OCC Plaqué Argent 3m" Référence : 19410 et le son est remarquable de détails et de précision, câble bien supérieur à ceux en ma possession.
Voila mon avis et bonne écoute à tous les audiophiles.
 (0)
 (0)
This review has been posted for TOPPING A900 Balanced Headphone Amplifier Preamplifier
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TOPPING A900 Balanced Headphone Amplifier Preamplifier
TOPPING A900 Balanced Headphone Amplifier Preamplifier
The Topping A900 is a high-end headphone amplifier and preamplifier, combining power, performance and design. It benefits from...

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