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Black desktop DAC headphone amplifier with front panel volume knob, 6.35mm and 4.4mm headphone jacks, and RGB indicator lights

FiiO

FiiO K7 Balanced DAC Headphone Amplifier Black

SKU CH-5CZQ-JK7W6

Desktop balanced DAC and headphone amplifier with dual AK4493S DACs, dual THX AAA 788+ amps, USB, optical, coaxial and AUX inputs, 4.4 mm balanced and 6.35 mm single-ended outputs.

  • Product typeAccessories
  • Product colorBlack
  • Dual AK4493SEQ DACs deliver high-resolution PCM 384kHz and DSD256 playback
  • Dual THX AAA 788+ amplifiers provide 2000mW balanced power to drive demanding headphones
  • Six-stage audio architecture mirrors FiiO flagship designs for transparent signal path
  • Versatile I/O includes USB, optical, coaxial, AUX inputs and 4.4mm, 6.35mm, 3.5mm outputs
  • Adjustable gain, output mode and RGB status indicators tailor performance to any headphone

Balanced DAC and headphone amplifier

The FiiO K7 is a desktop DAC and headphone amplifier with fully balanced architecture. It uses dual AK4493SEQ DAC chips and dual THX AAA 788+ amplifier modules. The unit is designed for listeners who want high-resolution playback from a single compact device.

Installation and common issues

Connect the K7 to a computer via USB-B, or use optical and coaxial digital inputs for other sources. An analogue AUX input is also available. For mobile use, an OTG cable is required and USB debugging must be enabled on the phone. The device has no battery and relies on its built-in linear power supply.

Output power and headroom

Balanced 4.4 mm output delivers up to 2000 mW at 1 percent THD+N, driving most full-size headphones comfortably. Single-ended 6.35 mm and 3.5 mm outputs are also provided. Three output modes and two gain levels let you match sensitivity, while RGB indicators show the active sampling rate up to PCM 384 kHz and DSD256.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $246.99
Pricier than about 90% of the 7,078 comparable items (median $25.99).

Specifications

Product
Product typeAccessories
Product colorBlack

Questions about this item

How can I verify the AK4493S DACs and THX AAA 788+ amps are operating correctly after connecting the K7?

The front-panel RGB indicator shows the current input, gain and sampling-rate mode, so you can confirm the dual AK4493S DACs and dual THX AAA 788+ amps are active and locked to the expected rate.

Which cables or adapters must I buy separately to use the USB, optical, coaxial, 6.35 mm and 4.4 mm connections?

The K7 ships with a power supply and a USB-B cable; you must source an optical Toslink cable, a coaxial RCA cable, a 6.35 mm headphone plug or a 4.4 mm balanced plug if your headphones use those terminations.

Should I choose the 4.4 mm balanced output or the 6.35 mm single-ended output for 2000 mW into demanding full-size headphones?

The 4.4 mm balanced output delivers the rated 2000 mW at 1 % THD+N, while the 6.35 mm single-ended output provides less power; use the 4.4 mm jack for maximum drive capability.

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