• Topping A50 III headphone amplifier in black, front three-quarter view
  • Topping A50 III in black, front panel and rear panel with RCA and TRS inputs
  • Topping A50 III front and rear panels with labeled jacks, controls and inputs
  • Topping A50 III feature graphic: NFCA modules, three gain steps, 3500mW x 2
  • Topping A50 III dimensions and box contents with 15V DC adapter
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Topping

Topping A50 III Headphone Amp — NFCA, 4.4mm Balanced, 3500mW x 2

Topping A50 III Headphone Amp — NFCA, 4.4mm Balanced, 3500mW x 2
  • Genuine & Brand-New
  • Free Shipping · Ships from China
  • 1-Year Warranty
  • 45-Day Returns
$231.99 USD
$231.99 USD
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The Topping A50 III is a desktop headphone amplifier built on NFCA modules, with a 6.35mm output and a 4.4mm balanced output, RCA and balanced TRS inputs, and up to 3500mW x 2 into 16Ω from the balanced jack. It suits listeners who already own a DAC and want one amp for sensitive IEMs and demanding full-size headphones.

Who the Topping A50 III is for

  • Demanding headphones: The 4.4mm balanced output delivers 2700mW x 2 into 32Ω, 760mW x 2 into 300Ω and 395mW x 2 into 600Ω.
  • Sensitive IEMs: Three gain steps start at -12dB on the 6.35mm jack, and Topping rates noise as low as 0.3µVrms at low gain.
  • Single-ended or balanced DACs: A rear switch selects between RCA and balanced 6.35mm TRS inputs, so it connects to either kind of DAC output.
  • Stacked desktop systems: A 12V trigger input lets a source with a trigger output, such as the Topping D50 III DAC it is designed to pair with, switch it on and off.
  • Skip it if: You need a DAC, USB or Bluetooth input or a preamp output: the A50 III is an analog headphone amp only, and it runs from an external 15V adapter.

Topping A50 III key specs

  • Amplifier: NFCA (Nested Feedback Composite Amplifier) modules
  • Balanced output (4.4mm): 3500mW x 2 @16Ω, 2700mW x 2 @32Ω, 760mW x 2 @300Ω, 395mW x 2 @600Ω (THD+N <0.1%)
  • Single-ended output (6.35mm): 2150mW x 2 @16Ω, 1400mW x 2 @32Ω, 190mW x 2 @300Ω, 100mW x 2 @600Ω
  • Distortion and noise: THD+N <0.00006% at 1kHz; SNR and dynamic range up to 144dB; output impedance <0.1Ω
  • Gain: Low / Medium / High: -12dB, 0dB, +11.9dB (6.35mm); -6dB, +6dB, +17.9dB (4.4mm)
  • Inputs: RCA and balanced 6.35mm TRS (rear selector switch); 12V trigger in (3.5mm)
  • Power: DC 15V/1A through a 5.5 × 2.1mm jack; 15V adapter included
  • Size and weight: 12.5 × 14.0 × 2.6cm; 495g
  • In the box: A50 III, 15V DC adapter, 6.35mm-to-3.5mm adapter, product information card
  • Colors: Black, Silver

Genuine Topping stock. Free shipping on every order, 45-day returns.

Topping A50 III vs similar options

  • vs SMSL RAW-HA1: Adds a USB input (XMOS XU316, up to 32-bit/768kHz and DSD256) and Bluetooth 5.1 with LDAC; pick the A50 III if your DAC is already in place and you want an analog amp rated 3500mW x 2 into 16Ω balanced.
  • vs Fosi Audio GR70: Adds four tubes, bass and treble controls and an RCA preamp output; pick the A50 III for 2700mW x 2 into 32Ω balanced against the GR70's 300mW max, plus a 4.4mm balanced jack.
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Good to know

Buying from TonePier

Is this unit genuine?

Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.

Where does my order ship from, and how long does it take?

Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.

What if it isn't for me?

You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.