Topping
A90D
Best balanced amplifier for audiophiles seeking pristine, high-fidelity headphone performance.
The Topping A90D is a high-performance balanced headphone amplifier and pre-amplifier. It utilizes a fully discrete NFCA module design with 39 transistors per module to achieve unparalleled distortion and noise performance. With a robust relay volume control, ground loop noise elimination, and support for both balanced and single-ended connections, it serves as a versatile centerpiece for any audiophile system.
$521.13
Owner Satisfaction
4.7
/ 5
Category Rank
53
/ 733
#53 in Headphone Amplifiers
Price vs Category Average
-63%
Below average
Weight
1.5
/ kg
Who it's for
- Audiophiles seeking absolute sonic transparency and clarity
- Desktop users needing a versatile preamp and amplifier hub
- Owners of power-hungry planar or high-impedance headphones
Who should skip it
- Listeners preferring a warmer, more colored musical presentation
- Budget-conscious buyers looking for entry-level pricing
- Users wanting an all-in-one unit with remote convenience
Performance breakdown
Signal Clarity
Near-zero distortion levels provide an incredibly transparent and pristine listening experience.
Power Output
Effortlessly drives even the most demanding high-impedance headphones with massive headroom.
Volume Precision
Relay-based control ensures perfect channel balance at every single volume step.
Build Quality
Solid desktop construction feels premium and built to last for years.
System Versatility
Comprehensive input and output options make it a flexible system centerpiece.
Noise Floor
Ground loop elimination keeps the background silent for absolute sonic purity.
Key Specs
Weight
1.5 kg
Dimensions
22.2 x 16.0 x 4.5 cm
Power Output
9800mW @ 16Ω
Signal-to-Noise Ratio
145dB
Total Harmonic Distortion
0.000055%
Frequency Response
20Hz - 40kHz
Impedance Range
16Ω - 600Ω
Number of Headphone Outputs
3
Features
- Fully discrete NFCA modules for exceptional performance
- R2R relay volume control for precise adjustment
- Ground loop noise terminator switch
- 12V trigger interface for system integration
- Redesigned UI with volume memorization
- Supports balanced and single-ended inputs
- Drives high-impedance headphones
- High-quality pre-amplifier functionality
- Remote control included
What customers say
Customers overwhelmingly praise the Topping A90D for its exceptional transparency and neutrality, delivering remarkably clean and accurate sound that lets source material shine. A key highlight is its immense power output, effortlessly driving demanding headphones with precise control and ample headroom. Reviewers consistently note the virtually inaudible noise floor, even with sensitive gear, underscoring meticulous engineering. The robust build quality conveys premium craftsmanship. Many users consider the A90D an outstanding value, as its objective performance rivals much costlier amplifiers. While some prefer a warmer sound, the majority celebrate its technical fidelity and versatile preamplifier functionality, making it a cornerstone for discerning desktop audio setups.
Know before you buy
Yes, the A90D is designed to handle a wide range of headphones from 16Ω to 600Ω. With a power output of 9800mW at 16Ω, it provides more than enough headroom for even the most demanding high-impedance models.
Yes, it comes with a dedicated remote control. This allows you to adjust the volume and navigate settings from your listening position without needing to reach for the unit.
The ground loop noise terminator is a physical switch on the back of the unit designed to eliminate audible hum or buzz caused by ground loops in your audio chain. It is particularly useful if you notice background noise when connecting multiple devices to the amplifier.
Absolutely. The A90D functions as a high-quality pre-amplifier, allowing you to connect it to powered monitors or a separate power amplifier. You can easily toggle between headphone and pre-amp modes using the interface.
The R2R relay volume control uses physical relays to switch resistors, ensuring perfect channel balance even at very low volume levels. Unlike traditional potentiometers, it will not develop channel imbalance or scratchy noise over time.
Yes, the redesigned UI includes a volume memorization feature. The device will recall your last used volume level when you power it back on, so you don't have to manually reset it each time.
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