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Description
FiiO K9 Overview
- 1Description
- 2At a Glance
- 3High-Performance Dual Cores Shake Souls
- 4Pure Clean Sound
- 5Precisely Designed
- 6Robust Power Supply
- 7Precision Clock Management
- 8Hi-Res Bluetooth
- 9Next-Level Volume Control
- 10Lighting Up the Mood
- 11UAC Compatible
- 12Professional PEQ
- 13Horizontal or Vertical
Aimed at audiophiles and music enthusiasts, the high-fidelity FiiO K9 is a compact desktop USB DAC and headphone amplifier that faithfully reproduces your music when listening to audio from your computer, smartphone, tablet, or other digital music player. The K9 Pro utilizes the legendary AKM AK4499 DAC to deliver rich audio details and a superior performance at up to 32-bit / 768 kHz PCM and DSD512.
The device is equipped with 4.4mm and stereo RCA analog line, and optical, coaxial, and USB-B digital inputs. Selectable LO, PRE, and PO output configurations give you access to a combination of headphone output connectors including 1/4", balanced 4.4mm, and 4-pin XLR, and line outputs: RCA and balanced XLR-3. The K9 Pro acts as a bridge between your computer, mobile phone, speakers, and headphones, allowing them to work together seamlessly. Switchable low-, medium-, and high-gain levels are available, enabling you to use the amplifier with almost any headphones at comfortable volume levels.
At a Glance
- Drive power-hungry headphones (desktop USB audio + headphones)
- Connect to home audio setups (desktop USB audio + active speakers)
- USB-B connector (with included USB-B to USB-C cable) for easy connection to USB-C mobile devices
- RCA + XLR-3 balanced line out (for active speakers, monitors, external amplifiers)
- Connect to mobile devices (players, computers)
- Built-in Bluetooth Low Energy (BLE) technology allows you to use the FiiO Control app to control functions like filter selection, channel balance, and more even when not in Bluetooth mode.
High-Performance Dual Cores Shake Souls
Inside the K9 uses dual cores, ES9068AS*2 DAC | THX AAA 788+ amplifier, renowned in the audio industry for soul-shaking sound, supporting up to 32-bit / 768 kHz and native DSD512 audio.
Pure Clean Sound
The THX AAA 788+ chips (also found in the K9 Pro) provide exemplary details and dynamics no matter if you are using low or high-impedance headphones. Isolated digital and analog section power supply provides a pure background for your sound.
Precisely Designed
From the DAC, to the volume adjustment, to the amplification, every part of the K9 is truly balanced for greatly reduced crosstalk and more authentic sound. The PCB of the K9 features a partitioned layout, fully separating the major sections of the audio circuit, which guarantees the integrity of the audio signal being processed.
Robust Power Supply
- Electricity is the mother of sound, so special attention was paid to optimizing the K9's power supply to ensure excellent sound. The K9's linear power supply, with its four massive 4700uF capacitors, makes sure that the rest of the system gets abundant clean power, continuously.
- The digital portions of the K9 physically receive power separately from the analog portions, for effective shielding against audio interference between the two circuits. This ensures pure and faithful reproduction of your music.
- Besides the special high-performance linear power supply, the power stabilization and filtering within the audio circuit is also a big contributor to the K9's excellent sound. Specifically, in each stage of the audio circuit, ultra-low-noise LDOs are employed for voltage regulation.
Precision Clock Management
A dual-mode clock management design is utilized for the K9. Accurate and stable dual-mode clock management allows the K9 to easily play back high-resolution audio with the greatest fidelity, as if you were there with the performing artists.
Hi-Res Bluetooth
The K9 employs the Qualcomm QCC5124 chip to handle Bluetooth duties, with support for formats such as LDAC, aptX HD, and aptX Adaptive. This chip ensures that Bluetooth connections are both reliable and quick, satisfying both the low latency needs for games/videos and the high bitrate necessary for high-resolution audio.
Next-Level Volume Control
Adjusting the volume may look like a simple concept, but a good execution of it is crucial to an excellent audio experience. The ADC curve reconstruction method of volume adjustment used in the K9 effectively minimizes any left-right channel volume imbalance and noise. It also results in a smooth change of volume across 120 levels of volume. This attention paid to the simple process of volume adjustment is just another layer to making sure you truly savor your music with the K9.
Lighting Up the Mood
The RGB indicator lights surrounding the volume knob can light up differently depending on the currently playing sample rate and Bluetooth format, and give the K9 and its surrounding desk space some fun personality.
UAC Compatible
The K9 supports both UAC1.0 and UAC2.0 modes, allowing you to use the K9 with either devices that are simply plug-and-play or with devices that can work with the K9 and an additional driver for even better compatibility. And the FiiO Control App allows you to easily switch between UAC1.0 and UAC2.0 modes.
Professional PEQ
Through the FiiO Control app, you can quickly switch between seven music tuning style presets on the K9. If the selected tuning style fits the music you are listening to, you can acquire a more vivid and pleasant experience. If the preset tuning is not to your liking, the three self-define PEQ designs will help you to finely adjust to your favorite listening style.
Horizontal or Vertical
Featuring an all-aluminum construction made from an integrated stretching + CNC process to ensure the body's strength and precise finish, the K9 sits on your surface handsomely in either a horizontal or vertical orientation.
In the Box
- FiiO K9 Desktop USB DAC and Headphone Amplifier with Bluetooth
- Power Cord
- USB-B to USB-C Cable
- Vertical Mounting Stand
- 6 x Foot Pad
- Limited 1-Year Manufacturer Warranty
Table of Contents
- Description
- At a Glance
- High-Performance Dual Cores Shake Souls
- Pure Clean Sound
- Precisely Designed
- Robust Power Supply
- Precision Clock Management
- Hi-Res Bluetooth
- Next-Level Volume Control
- Lighting Up the Mood
- UAC Compatible
- Professional PEQ
- Horizontal or Vertical
FiiO K9 Specs
Key Specs
| Number of Headphone Channels |
2-Channel
|
| Recommended Headphone Impedance |
16 to 600 Ohms
|
| Headphone Output Power |
1/4" Unbalanced:
? 1 W into 16 Ohms (1% THD) ? 1.5 W into 32 Ohms (1% THD) ? 200 mW into 300 Ohms (1% THD) 4.4 mm Balanced: ? 2 W into 32 Ohms (1% THD) ? 1 W into 16 Ohms (1% THD) XLR Balanced: ? 1 W into 16 Ohms (1% THD) ? 2 W into 32 Ohms (1% THD) ? 780 mW into 300 Ohms (1% THD) |
| Analog Audio I/O |
1 x 4.4 mm TRRRS Balanced Stereo Line Input
1 x Stereo RCA Line Input 1 x Stereo RCA Output 2 x XLR 3-Pin Balanced Mono Output (1 Stereo Pair) 1 x 4.4 mm TRRRS Balanced Stereo Headphone Output 1 x 1/4" TRS Unbalanced Headphone Output 1 x XLR 4-Pin Balanced Stereo Headphone Output |
| Digital Audio I/O |
1 x TOSLINK Optical S/PDIF Input
1 x RCA Coaxial S/PDIF Input |
| USB |
1 x USB-B (Digital Input, Update)
|
| Wireless |
Bluetooth 5.1
|
| Frequency Response |
RCA Line Outputs:
20 Hz to 50 kHz -1.5 dB XLR Line Outputs: 20 Hz to 50 kHz -1.5 dB 1/4" Headphone Outputs: 20 Hz to 50 kHz -1.5 dB 4.4 mm Balanced Headphone Outputs: 20 Hz to 50 kHz 1.5 dB XLR Balanced Headphone Outputs: 20 Hz to 50 kHz 1.5 dB |
| Power Requirements |
AC Input
|
| Number of Headphone Channels |
2-Channel
|
| Recommended Headphone Impedance |
16 to 600 Ohms
|
| Headphone Output Power |
1/4" Unbalanced:
? 1 W into 16 Ohms (1% THD) ? 1.5 W into 32 Ohms (1% THD) ? 200 mW into 300 Ohms (1% THD) 4.4 mm Balanced: ? 2 W into 32 Ohms (1% THD) ? 1 W into 16 Ohms (1% THD) XLR Balanced: ? 1 W into 16 Ohms (1% THD) ? 2 W into 32 Ohms (1% THD) ? 780 mW into 300 Ohms (1% THD) |
| Digital Chipset |
DAC:
2 x ESS ES9068AS USB: 2 x XMOS XMOS XUF 208 Bluetooth: Qualcomm QCC5124 |
| Analog Circuitry |
Volume IC:
2 x NJU72315 Power Amplifier Op-Amp: 2 x THX AAA 788+ Low-Pass Filter Op-Amp: 1 x OPA1612 |
| EQ |
No
|
| Display |
No
|
Connectivity
| Analog Audio I/O |
1 x 4.4 mm TRRRS Balanced Stereo Line Input
1 x Stereo RCA Line Input 1 x Stereo RCA Output 2 x XLR 3-Pin Balanced Mono Output (1 Stereo Pair) 1 x 4.4 mm TRRRS Balanced Stereo Headphone Output 1 x 1/4" TRS Unbalanced Headphone Output 1 x XLR 4-Pin Balanced Stereo Headphone Output |
| Digital Audio I/O |
1 x TOSLINK Optical S/PDIF Input
1 x RCA Coaxial S/PDIF Input |
| USB |
1 x USB-B (Digital Input, Update)
|
| Other I/O |
1 x SMA Coaxial Antenna
|
| Wireless |
Bluetooth 5.1
|
| Bluetooth |
5.1
|
| Supported Audio Codecs |
AAC, aptX, aptX Adaptive, aptX HD, aptX LL, LDAC, SBC
|
Performance
| Frequency Response |
RCA Line Outputs:
20 Hz to 50 kHz -1.5 dB XLR Line Outputs: 20 Hz to 50 kHz -1.5 dB 1/4" Headphone Outputs: 20 Hz to 50 kHz -1.5 dB 4.4 mm Balanced Headphone Outputs: 20 Hz to 50 kHz 1.5 dB XLR Balanced Headphone Outputs: 20 Hz to 50 kHz 1.5 dB |
| Maximum Output Level |
RCA Line:
2.4 Vrms (At 1 kHz, 10 Kilohms) XLR Line: 4.8 Vrms (At 1 kHz, 10 Kilohms) 1/4" Headphone Outputs: 21 V p-p 4.4 mm Balanced Headphone Outputs: 42 V p-p XLR Balanced Headphone Outputs: 42 V p-p |
| Impedance |
Headphone/Balanced Headphone Outputs:
< 1 Ohm (32-Ohm Load) |
| THD+N |
RCA Line:
< 0.00026% (A-Weighted, 1 kHz, 10-Kilohm Load) XLR Line: < 0.00025% (A-Weighted, 1 kHz, 10-Kilohm Load) 4.4 mm Line: < 0.00025% (A-Weighted, 1 kHz, 100-Kilohm Load) 1/4" Headphone: < 0.00028% (A-Weighted, 1 kHz, 32-Ohm Load) 4.4 mm Balanced Headphone: < 0.00029% (A-Weighted, 1 kHz, 32-Ohm Load) XLR Balanced Headphone: < 0.00029% (A-Weighted, 1 kHz, 32-Ohm Load) |
| SNR |
RCA Line:
? 119 dBA XLR Line: ? 124 dBA 4.4 mm Line: ? 124 dBA 1/4" Headphone: ? 124 dBA 4.4 mm Balanced Headphone: ? 119 dBA XLR Balanced Headphone: ? 119 dBA |
| Noise |
RCA Line Outputs:
< 2.9 µV (A-Weighted) XLR Line Outputs: < 3.1 µV (A-Weighted) 1/4" Headphone: < 4.8 µV (A-Weighted) 4.4 mm Balanced Headphone: < 7.1 µV (A-Weighted, Aux In) XLR Balanced Headphone: < 7.1 µV (A-Weighted, Aux In) |
| Crosstalk |
RCA Line Outputs:
? 111 dB (1 kHz, 10-Kilohm Load) XLR Line Outputs: ? 120 dB (1 kHz, 10-Kilohm Load) 1/4" Headphone: ? 75 dB (1 kHz, 32-Ohm Load) 4.4 mm Balanced Headphone: ? 114 dB (1 kHz) XLR Balanced Headphone: ? 114 dB (1 kHz) |
Digital Audio
| Sample Rates |
USB-A Input:
768 kHz (PCM) Optical S/PDIF Input: Up to 96 kHz (PCM) Coaxial S/PDIF Input: Up to 192 kHz (PCM) |
| Bit Depths |
Up to 32-Bit (PCM)
|
Compatibility
| OS Compatibility |
Windows
macOS *As of May, 2023: Check with manufacturer for the most up-to-date compatibility |
| Mobile App Compatible |
Yes: Android & iOS
App Name: FiiO Control Functionality: Adjust Settings *As of May, 2023: Check with manufacturer for the most up-to-date compatibility |
| Mobile Device Compatibility |
No
|
Power
| Power Requirements |
AC Input
|
| AC Input Power |
User Selectable:
100 to 240 VAC, 50 / 60 Hz |
| AC/DC Power Adapter |
No
|
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Bulk Discount
| Quantity | Price |
| 2 | ₹ 59554.6 |
| 3-5 | ₹ 58946.9 |
| 5-10 | ₹ 57731.5 |
| 10+ | ₹ 56516.1 |
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