TOPPING A90 Discrete / A90 Headphone Amp (Apos Certified)

$449 $599

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This is an Apos Certified product. That means it's refurbished, like new, eligible for our 45-day return policy, carries an Apos Certified One-Year Warranty, and ships from our US facility. Currently, Apos Certified products are only available to customers with a US shipping address. We appreciate your understanding as we aspire to expand our offerings to a broader audience in the future.

Our best-selling amplifier 

“Mr. Clean.” “The Giant Killer.” “The Best Amp Ever.” These are a few of nicknames the TOPPING A90, our best-selling amplifier, has gained since its release. At its most basic level, it’s a balanced amp and pre-amp with tremendously clean and powerful output. At its broadest level, it’s become the benchmark by which all other solid state amplifiers below $1,000 are judged. 

Calling all cans

Planar magnetic, electrostatic, dynamic drivers, IEMs–pick your poison, the A90 can handle it. Thanks to its NFCA modules, three-step gain switch, and excellent AC and DC performance, the A90 can push loads of power into high-impedance full-sized headphones or pare that power back in order to drive sensitive IEMs. And with an ultra-low noise rating and high dynamic range, the A90 does it all without producing any audible noise. 

Pre-amp mode

With the A90 in pre-amp mode, connect a power amplifier to drive bookshelf, desktop, or floor speakers. You can also connect the A90 to the D90SE DAC in pre-amp mode to create a complete high-end sound system. 

Product highlights 

  • Headphone amp and pre-amp
  • 4-pin XLR, 4.4 balanced, and 6.35mm outputs
  • 3-step gain switch 
  • Can drive full-sized headphones and sensitive IEMs
  • NFCA modules
  • THD+N: <0.00006%
  • DNR: 145dB
  • Noise: <0.2uVrms
  • Output impedance: <0.1Ω
  • Maximum output power: 7600mW x2


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Featured Reviews

"This is the perfect amp for anyone wanting to get a completely dead-neutral reference sort of amplification." -DMS

"This is the best test bench amplifier that I've run across so far." -Joshua Valour

"How good's the TOPPING A90? F*****g good. F*****g real good." -Z Reviews

Professional Product Review of TOPPING A90 Discrete / A90 Headphone Amp (Apos Certified)

Apos Certified

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