FiiO K7 BT Desktop DAC and Headphone Amplifier Bluetooth Version USB Optical In

The FiiO K7 BT is a fully balanced desktop DAC and headphone amplifier with Bluetooth, featuring dual AK4493SEQ DACs, dual THX AAA 788+ amplifiers and a QCC5124 Bluetooth chip. It delivers up to 2000mW into 32 ohms and accepts USB, optical, coaxial and RCA inputs. It is part of FiiO's desktop DAC range.

This is the Bluetooth version with app control via the QCC5124 chip. If you only need wired inputs, see the standard K7. If you are looking for a more powerful option, FiiO also offer the FiiO K15 Desktop DAC and Headphone Amplifier.

Key specifications

• DAC: 2 x AK4493SEQ (one per channel)
• Amplifier: Dual THX AAA 788+
• Output power: 2000mW at 32 ohms, 560mW at 300 ohms (1% THD)
• Outputs: 6.35mm single-ended and 4.4mm balanced
• Inputs: USB, optical, coaxial and RCA
• USB decoder: XMOS XUF208
• Bluetooth: QCC5124 chip with app control
• SNR: Over 128.1dB
• Dimensions and weight: 120 x 160 x 55mm, approximately 610g

Desktop DAC and headphone amplifier

The K7 BT is a truly balanced headphone amplifier with THX AAA 788+ amplifier technology, dual AK4493SEQ DACs and a full set of inputs and outputs for desktop use.

Truly balanced decoding

The K7 BT uses a six-stage audio circuit with fully balanced analogue and digital sections, reducing crosstalk and keeping the signal clean from input to output.

High-power balanced amplification

Using the same THX AAA 788+ amplifiers as the K9 Pro, the K7 BT outputs 560mW into 300 ohms and 2000mW into 32 ohms (both at 1% THD). This makes it capable of driving both low and high-impedance headphones with ease.

Dual DAC configuration

Each channel has a dedicated AK4493SEQ DAC, providing a rich and detailed sound that is consistent across the stereo field.

Robust decoding

The XMOS XUF208 decoder chip uses dual clock management to handle a wide range of audio formats reliably.

RGB indicator lights

The RGB indicators display single and mixed colours, with a light flow effect during power on/off and input switching.

Protection circuits

Overheating, overload and DC protection systems keep the K7 BT operating safely under normal listening conditions.

Power design

Multiple independent power stages, each regulated by low-noise LDOs, are fed by an external 12V switching power supply for clean, stable power delivery.

One-touch input switching

A single button switches between the four inputs, with a flowing light effect confirming when the input is ready.

Gain control

High and low hardware gain settings let you match the K7 BT to headphones of varying impedance and sensitivity.

Construction

The K7 BT is built from CNC-finished aluminium alloy in black with gold THX and Hi-Res Audio badge accents and RGB lighting.