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Silver desktop headphone amplifier with colour display and multiple output sockets

Topping Inc.

Topping A70 Pro 17000mW*2 Headphone Amp Preamp Silver

SKU CH-64W0-K7SB4

A desktop headphone amplifier and preamp delivering 17000 mW per channel with 147 dB dynamic range, balanced 4.4 mm and 6.35 mm outputs, XLR and RCA inputs, a 12 V trigger.

  • 147 dB dynamic range from new three-stage feedback circuit
  • 17000 mW per channel drives demanding headphones
  • 20 kΩ input impedance improves source compatibility
  • Full colour screen with FFT and VU display modes
  • GND/LIFT switch removes ground-loop noise

What the Topping A70 Pro Is

The Topping A70 Pro is a desktop headphone amplifier and preamplifier built around the Tang-ku-la module. It delivers up to 17000mW per channel into suitable loads and offers a 147dB dynamic range for transparent playback. Two gain settings let it drive both low-sensitivity over-ear headphones and high-sensitivity IEMs without audible background noise. A GND/LIFT switch removes ground-loop hum when multiple devices share a signal chain.

Thermals Noise and Power Draw

The unit runs from a 12V trigger supply and uses relay-based volume control for channel matching and silent adjustment. Ultra-low noise input stages and 20kΩ input impedance keep self-noise below audibility even with sensitive in-ear monitors. Balanced and single-ended inputs accept RCA, XLR, TRS and EXT sources without adding measurable distortion. The full-colour display and touch buttons draw minimal power and produce no fan noise.

The Deciding Specification

The 147dB dynamic range sets the noise floor low enough for critical listening with any headphone type. Four headphone outputs — 4.4mm balanced, 6.35mm single-ended, 4-pin XLR balanced and EXT — cover every common termination without adapters. Preamp outputs on XLR and RCA feed powered speakers or a second amplifier. Buyers who need integrated DAC conversion or wireless streaming must add a separate source component.

Highlights

  • 147 dB dynamic range from new three-stage feedback circuit
  • 17000 mW per channel drives demanding headphones
  • 20 kΩ input impedance improves source compatibility
  • Full colour screen with FFT and VU display modes
  • GND/LIFT switch removes ground-loop noise

Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the 12 V trigger and avoid ground-loop hum with the GND/LIFT switch?

Plug the 12 V trigger cable into the rear 12 trigger jack so the amp powers on with your source; if hum appears when chaining gear, flip the rear GND/LIFT switch to LIFT to break the ground loop.

What upkeep does the relay volume control and colour display need over time?

The relay attenuator is solid-state with no potentiometer wear; keep vents clear and wipe the full-colour screen gently with a microfibre cloth if dust builds up.

At what output level does the 147 dB dynamic range stop protecting IEMs from audible noise?

With the low-gain setting engaged, the 147 dB dynamic range keeps the noise floor inaudible even for ultra-sensitive IEMs at normal listening volumes.

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