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FiiO's K7 BT is a high performance desktop DAC and Headphone Amplifier combo, demonstrating an exemplary design for an audio reproduction marked by great transparency, richness and precision. It embeds a Bluetooth QCC5124 chip allowing the support of high definition formats, all with a low latency transmission.
The K7 BT uses the same THX AAA 788+ amplifier as the K9 Pro. It is capable of outputting up to 560mW at 300Ω for only 1% distortion and up to 2000mW at 32Ω for only 1% distortion.
Each channel is equipped with its own DAC chip AK4493SEQ producing a rich and delicate sound with a pleasant timbre.
The XMOS XUF208 chip uses a dual clock management system to handle a multitude of different audio formats.
The K7 BT's massive, beautifully integrated metal knob on the front panel provides comfortable control of the volume level. The circular LED indicator surrounding this volume knob lights up in different colors depending on the sample rate of the file being played, while complementing the sobriety of the case with a touch of color.
The Bluetooth QCC5124 chip supports high definition formats such as LDAC, aptXHD and aptX adaptive. The bluetooth function will make you enjoy an excellent sound experience thanks to its low latency and accessible formats.
In addition, you can via the application FIIO update the software bluetooth to improve your experience.
Your K7 BT is protected from overheating, overloading and also has DC power protection to ensure the best listening experience over the long term.
1 | Source indicator |
2 | Jack 6.35mm Output |
3 | Source selection |
4 | Gain |
5 | Output selection |
6 | Volume/selection button |
7 | Jack 4.4mm Balanced Output |
8 | Bluetooth Antenna |
9 | Stereo RCA input |
10 | Pre-out RCA output |
11 | Coaxial input |
12 | Optical Toslink input |
13 | USB-B input |
14 | DC 12V load |
The adjustment of the gain level is done simply thanks to a switch on the front panel of the K7 BT. For the gain, the device offers 2 settings. This setting allows the K7 BT to be used with a large majority of headphones and earphones on the market for a comfortable volume listening. Concerning the volume, the K7 BT has 112 adjustable steps thanks to the knob on its front panel.
The K7 BT incorporates an ADC, allowing it to take advantage of an RCA line input with adjustable volume level. It reconstructs the analog volume curve to allow for smooth and accurate adjustment while eliminating unwanted noise and potential balance problems. This design also allows many different headphone models with different sensitivities to be used with the K7 BT.
Technical characteristics
SpEcifications | |
---|---|
Product type | DAC Headphone amplifier |
DAC chips | 2x AK4493SEQ |
USB Interface | XMOS XUF208 |
Bluetooth Chips | QCC5124 |
Inputs | 1x USB-B 1x Coaxial SPDIF 1x Optical Toslink 1x Stereo RCA line input Bluetooth |
Outputs | 1x Stereo RCA line output 1x 4.4mm balanced headphone output 1x 6.35mm headphone output |
Bluetooth codecs supported | LDAC, aptX, aptX Adaptative, aptX HD, aptX LL, AAC, SBC |
Supported sampling rates | PCM 32bit 384kHz DSD256 |
Amplification | THX AAA 788+ Amp |
Adjustable gain | |
Recommended headphone impedance | 16-300Ω |
Headphone output power | L+R 2000mW + 2000mW (32Ω, balanced headphone output, THD+N < 1%) L+R 1220mW + 1220mW (32Ω, unbalanced output, THD+N < 1%) |
SNR | PO ≥ 123dB (A-weighted, UAC) Balanced output ≥ 120 db (A-weighted, UAC) |
Background noise | PO < 4.4 uV (A-weighted, UAC) Balanced output < 7.7 uV (A-weighted, UAC) |
Output impedance | < 1 Ohm (32 Ohm load) |
General | |
---|---|
Dimensions | 120 x 168 x 55mm |
Weight | 620g |
Color | Black |
Input | USB |
Input | SPDIF |
Input | Bluetooth |
Input | RCA |
Input | Optical |
Output | Jack 6.35mm |
Output | RCA |
Output | Jack 4.4mm |
DAC / ADC Chip | AK4493S |
Max sampling rate | 384kHz |
Max sampling rate | DSD256 |
Color | Black |
Class | Class D / T |
Networking | No |
Remote Control | No |