Topping A900 Ultra-Flagship Headphone Amplifier
Experience reference-level sound with uncompromising power and precision.
Elevate your listening to an elite tier with the Topping A900, a truly ultra-flagship headphone amplifier engineered for audiophiles and professionals who demand clean, robust performance. Featuring a patented six-channel T’ang-ku-la fully differential circuit with three-stage feedback, the A900 delivers exceptional clarity, minimal distortion, and elite technical performance—all within a sleek, user-friendly design.
Thunderous Output Power
With 22,000 mW per channel at 16 Ω, the A900 drives even the most demanding headphones with ease. Immense headroom and ultra-low distortion are assured, with THD+N below 0.00003% and SNR/DNR up to 151 dB.
Advanced T’ang-ku-la Architecture
The three-stage feedback T’ang-ku-la circuit leverages six fully differential amplification channels, sustaining balance from input to output. This drastically reduces circuit noise, crosstalk, and thermal distortion while extending component longevity.
All Your Outputs, All the Time
Enjoy six high-quality headphone outputs: 6.35 mm single-ended, 4.4 mm balanced, 4-pin XLR balanced, and dual 3-pin XLR balanced. Premium Neutrik and Pentaconn connectors ensure secure, reliable connections. Outputs can be used independently or simultaneously for maximum flexibility.
Versatile Preamp Mode
Switch to preamp mode and the A900 supplies up to 60 Vpp via balanced XLR outputs, maintaining THD+N below 0.000055%. Perfect for integrating with power amps, active speakers, or professional studio monitors.
Precision Relay-Based Volume Control
The fully balanced relay volume control offers ultra-fine adjustments in 0.5 dB increments and achieves extraordinarily low channel crosstalk (down to −153 dB). This delivers smooth, accurate level control without signal degradation.
Smart, Customizable Display
A sharp 2-inch full-colour display shows playback info, FFT spectrum, or a VU meter, with nine selectable background themes. Navigation is effortless via a tactile knob and three touch buttons.
Crafted Build & Premium Remote
The included remote is CNC-machined from a single block of sandblasted aluminum, offering a premium feel that perfectly matches the amplifier’s sleek chassis.
Clean, Stable Power Architecture
Analog and digital power supplies are physically isolated, significantly reducing interference and preserving signal integrity.
Technical Highlights
- THD+N: <0.00003 % (90 kHz bandwidth)
- SNR/DNR: up to 151 dB
- Frequency Response: 20 Hz–40 kHz (±0.05 dB) / 10 Hz–200 kHz (±0.1 dB)
- Noise Floor: below 1 μVrms
- Output Impedance: <0.1 Ω
- Power (THD+N <0.1%): 6000 mW × 2 @ 16 Ω, 3000 mW × 2 @ 32 Ω, up to 750 mW × 2 @ 600 Ω
- Dimensions: approx. 33 × 20 × 5.7 cm
Why the Topping A900 Stands Out
Designed for audiophiles and professionals alike, the A900 blends immense power with unmatched clarity. It excels at driving high-impedance headphones, integrates seamlessly into home or studio setups, and combines technical mastery with elegant design.
Technical Specifications
| General | |
|---|---|
| Model | Topping A900 |
| Type | Ultra-Flagship Desktop Headphone Amplifier |
| Dimensions | 330 × 200 × 57 mm |
| Weight | Approx. 4.5 kg |
| Performance | |
| THD+N | <0.00003 % (90 kHz bandwidth) |
| SNR/DNR | Up to 151 dB |
| Noise Floor | <1 μVrms |
| Frequency Response | 20 Hz–40 kHz (±0.05 dB) / 10 Hz–200 kHz (±0.1 dB) |
| Output Impedance | <0.1 Ω |
| Output Power (THD+N <0.1%) | |
| 16 Ω | 6000 mW × 2 |
| 32 Ω | 3000 mW × 2 |
| 64 Ω | 1500 mW × 2 |
| 600 Ω | 750 mW × 2 |
| Inputs | |
| Balanced | XLR |
| Single-Ended | RCA |
| Headphone Outputs | |
| Single-Ended | 6.35 mm |
| Balanced | 4.4 mm |
| Balanced | 4-pin XLR |
| Balanced | Dual 3-pin XLR |
| Preamp Outputs | |
| Balanced | XLR (up to 60 Vpp) |
| Single-Ended | RCA |
| Features | |
| Fully differential six-channel T’ang-ku-la circuit with three-stage feedback | |
| Balanced relay-based volume control (0.5 dB steps, ultra-low crosstalk) | |
| 2-inch full-colour display with FFT spectrum and VU meter modes | |
| Nine selectable background themes | |
| CNC-machined aluminum chassis and remote | |
| Isolated analog and digital power supplies | |
TBC
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Delivery & Returns Information
Item Ships from our UK Warehouse - Typical delivery is 3 - 5 business days for mainland UK. OTIC can be contacted for updates.
Free shipping on all baskets over £250.
We offer a refund on any unused items, subject to our returns policy.
Click here to view all delivery & returns info - including shipping, tax, and duty information for International Customers.
Frequently Asked Questions
The A900 uses a patented six-channel fully differential T’ang-ku-la circuit with three-stage feedback. This design ensures ultra-low distortion, exceptional clarity, and immense power output, making it one of the most advanced headphone amplifiers available.
Yes. With up to 22,000 mW per channel at 16 Ω and 750 mW per channel at 600 Ω, the A900 has more than enough headroom to power demanding high-impedance and planar magnetic headphones.
Absolutely. In preamp mode, the A900 outputs up to 60 Vpp through balanced XLR outputs, maintaining excellent linearity and ultra-low distortion. This makes it ideal for powering active speakers or connecting to power amplifiers.
The A900 provides multiple output options, including 6.35 mm single-ended, 4.4 mm balanced, 4-pin XLR balanced, and dual 3-pin XLR balanced. These ensure compatibility with a wide range of headphones and cables.
The A900 uses a balanced relay-based volume control system with ultra-fine 0.5 dB steps. This ensures smooth, accurate volume adjustments and minimizes crosstalk for precise channel balance.
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