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.

A new baseline for balanced sound

The K7 has a six-stage audio circuit with truly balanced analog and digital sections, which helps to reduce crosstalk and reproduce music faithfully and noiselessly.

Balanced amplification couldn’t sound better

Using the same THX AAA 788+ amplifiers as the K9 Pro, the K7 is capable of outputting 560mW into a 300Ω load at 1% distortion, and 200mW into a 32Ω load at 1% distortion. This ensures both low and high impedance headphones are fully powered with optimal musicality.

Dual AK4493SEQ D/A chips

The left and right channels are each equipped with an efficient high-performance AK4493SEQ D/A chip. These 32-bit D/A chips support 768kHz PCM and DSD512, ideal for high-resolution audio source playback.

RGB indicator lights

The RGB indicator lights are capable of displaying single colors as well as mixed colors, with a unique light flow effect during power on/off or input switching. 

Worry-free listening

Overheating, overload, and DC protection systems ensure that the K7 always operates at its best, so you can always enjoy a worry-free listening experience.

Multiple independent power stages

The K7 features a power design consisting of multiple independent stages, with the voltage of each stage regulated by low-noise LDOs. Feeding this power design is an external 12V switching power supply. All in all, the K7’s power design supplies plentiful, clean power for an extraordinary listening experience.

Smooth operator

The K7 features an all-aluminum alloy construction, carefully finished with CNC and other processes. Its elegant black color is perfectly complemented by the gold accents of the THX and Hi-Res Audio badges and the splashes of color from the RGB lights.

Precisely-tuned volume

Thanks to its ADC curve reconstruction, the volume potentiometer features 112 smooth steps of adjustable volume free of channel imbalances and noise.

Space-conscious design 

The K7 features a space-conscious design that only measures 2.1 inches thick and with a footprint smaller than ⅓ of an A4 sized sheet of paper–allowing it to fit snugly on even small desks.

Product highlights

• THX AAA &88+ x2 amplifiers
• Dual AK4493SEW D/A chips
• Truly balanced DAC/Amp
• Multiple intelligence protection systems
• RGB status indicators
• 2 gain levels
• 3 output modes
• Variety of inputs and outputs
• All-aluminum alloy body
• Classic knobs
• Lightweight, all-in-one device

Specs

• DAC: AK4493SEQ x2
• Decoder: XMOS XUF 208
• Amplifier: Dual THX AAA 788+
• Outputs: 6.35mm/4.4mm
• Inputs: USB, optical, coaxial, RCA
• Output power 1: >2W (32Ω, balanced/THD+N <1%)
• Output power 2: >7W (32Ω, single-ended/THD+N <1%)
• SNR: >128.1dB
• Noise floor: PO<4.1uV
• Output impedance: <1Ω
• Weight: 1.3lbs
• Dimensions: 4.7” x 6.6” x 2.1”

What’s included

• FiiO K7 
• Power cable x1
• Power adapter x1
• USB cable x1
• Quick start guide x1
• Warranty card x1