FiiO K7 – Desktop DAC and Headphone Amplifier
FiiO K7 – Desktop DAC and Headphone Amplifier
- Dual AK4493SEQ DACs and THX Amplification
- 4.4mm Balanced Headphone Output
- 6.35mm Single-Ended Output
- USB, Optical and Coaxial Inputs
- RCA Line Connections
- Six-Stage Balanced Signal Architecture
- 112-Step Volume Control
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AX STORE KUWAIT / AUDIO
FiiO K7 – Desktop DAC and Headphone Amplifier
The FiiO K7 brings digital playback and dedicated headphone amplification to a listening desk. Connect a computer or a suitable digital source, then choose the output that matches the actual wiring of your headphones.
K7 combines dual AK4493SEQ DAC chips with two THX AAA 788+ amplifier modules, plus an analogue RCA input for a wider range of sources. This listing is the standard K7, not the Bluetooth-equipped K7 BT.
Explore the Features
FEATURE 01
Dual AK4493SEQ DACs and THX Amplification
The K7 uses one AK4493SEQ DAC per channel with two THX AAA 788+ amplifier modules. That architecture is designed around a balanced desktop listening path, while a separate single-ended output remains available.
FEATURE 02
4.4mm Balanced Headphone Output
The balanced output is rated at 2,000mW per channel into 32Ω, with THD+N below 1% under the manufacturer test conditions. Use headphones with a correctly wired balanced cable. A simple adapter from a single-ended cable is not appropriate.
FEATURE 03
6.35mm Single-Ended Output
K7 also supplies a 6.35mm output rated at 1,220mW per channel into 32Ω under the same distortion limit. This is the relevant connection for conventional fixed-cable stereo headphones, using the correct plug-size adapter if needed.
FEATURE 04
USB, Optical and Coaxial Inputs
Use USB-B for computer audio, or connect a compatible optical or coaxial digital source. USB supports up to PCM 32-bit / 384kHz and native DSD256; optical and coaxial have lower limits, so match the source output format.
FEATURE 05
RCA Line Connections
An RCA line input lets K7 amplify an existing analogue source, while the RCA output supports a suitable downstream audio system. Choose the correct input and output mode before adjusting level.
FEATURE 06
Two Gain Levels
Low and high gain let you match volume control to the headphone. Start with the lower setting and increase only if needed; high gain does not inherently improve the recording or headphone.
FEATURE 07
Front-Panel Input and Output Selection
Separate input, gain and output controls keep the listening route visible. The illuminated volume ring also indicates the incoming sample-rate family, making source changes easier to follow.
FEATURE 08
RGB Sample-Rate Indicator
The light around the volume control identifies sample-rate groups, including a separate indication for DSD. It is a status aid, not a quality score for the music you are playing.
FEATURE 09
Dedicated External Power
K7 uses an external DC 12V/2A supply. The USB port carries data; this is not a battery-powered portable amplifier. Plan space for the power lead as well as the audio cables.
FEATURE 10
Standard K7, Without Bluetooth
Choose this model for wired sources. Bluetooth reception belongs to K7 BT, which is a different product. An ordinary USB Bluetooth adapter does not turn a K7 into that model.
FEATURE 11
Six-Stage Balanced Signal Architecture
Separate analogue and digital stages form a balanced signal path inside K7. The layout is designed to limit crosstalk between channels, supporting distinct left/right information in a desktop listening system.
FEATURE 12
112-Step Volume Control
ADC-assisted volume control provides 112 adjustment steps while addressing channel imbalance at lower listening levels. It gives you a practical way to choose a comfortable level rather than jumping between a setting that is too quiet and one that is too loud.
FEATURE 13
Built-In Protection Systems
Overheating, overload and DC protection monitor the amplifier path. They support normal operation while you match headphones and gain settings to the listening task.
FEATURE 14
Regulated Power and Aluminium Construction
Multiple independently regulated power stages work with the external supply, while a CNC-finished aluminium enclosure keeps the desktop unit compact and rigid. Its 55mm height makes it easy to place beside a keyboard or source.
Match the Amplifier to the Headphone
The Sennheiser HD 660S2 includes both balanced and single-ended cables. The DT 990 PRO Black Edition uses a fixed single-ended cable. Select the connection for the headphone wiring rather than simply choosing the socket with the larger power figure.
If you also need microphone recording, compare the Focusrite Scarlett 2i2 instead of expecting a listening DAC to capture an XLR signal.
Frequently Asked Questions
Does this K7 have Bluetooth?
No. This is the standard wired K7. Bluetooth is a feature of the separate K7 BT model.
Can I record a microphone through it?
No. It is a playback DAC and headphone amplifier, not an audio interface with microphone recording inputs.
Which headphone socket should I use?
Use 6.35mm for conventional single-ended headphones and 4.4mm only for a correctly wired balanced headphone cable.
Is it powered by USB?
No. It requires external DC 12V/2A power. The USB connection is for audio data.
Does every input support 384kHz?
No. USB supports up to PCM 384kHz, coaxial up to 192kHz and optical up to 96kHz.
Can it drive passive speakers directly?
No. The RCA line output needs powered speakers or a separate speaker amplifier.
Should I always choose high gain?
Start with the lower gain setting. Increase gain only if the headphone and source level require more usable volume range.
Why Buy from AX Store Kuwait?
Choose the exact model and connection that suit your setup at AX Store Kuwait. The specifications, setup guidance and related accessories on this page help you build a practical system around the product.
Technical Specifications
| Identity | |
|---|---|
| Brand | FiiO |
| Model | K7 |
| DAC | 2 × AK4493SEQ |
| Amplifier | 2 × THX AAA 788+ |
| Listed Finish | Black |
| Connections | |
| USB Input | USB-B data |
| Digital Inputs | USB, optical, coaxial |
| Headphone Outputs | 6.35mm single-ended; 4.4mm balanced |
| RCA Line Input | Yes |
| RCA Line Output | Yes |
| Bluetooth | No |
| Decoding and Output | |
| USB Decoding | Up to PCM 32-bit / 384kHz; native DSD256 |
| Coaxial Decoding | Up to PCM 24-bit / 192kHz |
| Optical Decoding | Up to PCM 24-bit / 96kHz |
| Balanced Power at 32Ω | 2000mW per channel; THD+N <1% |
| Single-Ended Power at 32Ω | 1220mW per channel; THD+N <1% |
| Gain Settings | Low / High |
| Power | |
| Power Supply | External DC 12V/2A |
| Battery | None |
| Weight | Approximately 610g |
| Circuit and Enclosure | |
| Signal Architecture | Six-stage balanced audio circuit |
| USB Decoder | XMOS XUF208 |
| Volume Control | 112 steps with ADC curve reconstruction |
| Protection | Overheating, overload and DC |
| Construction | Aluminium alloy |
| Height | 55mm |
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