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.
Box Contains
-
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
-
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
| Brand | FiiO |
| Model | FiiO K9 |
| MPN | FIK9 |
| Type | Headphone Amplifier |
| Form Factor | Tabletop |
| 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) 1/4 Unbalanced: ≥ 1.5 W into 32 Ohms (1% THD) 1/4 Unb |
| 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 | None |
| Display | None |
| 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 |
| 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 Coaxial SMA Antenna |
| Wireless Connectivity | Bluetooth (Audio Streaming, Mobile App) |
| Bluetooth | 5.1 |
| Supported Audio Codecs | AAC, aptX, aptX Adaptive, aptX HD, aptX LL, LDAC, SBC |
| 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 O |
| 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 O |
| 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 |
| SNR | RCA Line: ≥ 119 dBA XLR Line: ≥ 124 dBA 4.4 mm Line: ≥ 124 dBA 1/4 Headphone: ≥ 124 dBA 4.4 mm Bala |
| Noise | RCA Line Outputs: < 2.9 µV (A-Weighted) XLR Line Outputs: < 3.1 µV (A-Weighted) 1/4 Headphone: < 4. |
| Crosstalk | RCA Line Outputs: ≥ 111 dB (1 kHz, 10-Kilohm Load) XLR Line Outputs: ≥ 120 dB (1 kHz, 10-Kilohm Load |
| Sample Rates | USB-A Input: 768 kHz (PCM) Optical S/PDIF Input: Up to 96 kHz (PCM) Coaxial S/PDIF Input: Up to 192 |
| Bit Depths | Up to 32-Bit (PCM) |
| OS Compatibility | Windows macOS iOS Android *As of May, 2023: Check with manufacturer for the most up-to-date compatib |
| Mobile App Compatible | Yes: Android & iOS App Name: FiiO Control Functionality: Adjust Settings *As of May, 2023: Check wit |
| Mobile Device Compatibility | None |
| Power Requirements | AC Input |
| AC Input Power | User Selectable: 100 to 240 VAC, 50 / 60 Hz |
| AC/DC Power Adapter | None |
| Dimensions | 8.84 x 7.9 x 2.8 / 22.45 x 20 x 7.2 cm (without Feet) |
| Weight | 5.7 lb / 2.6 kg |
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Downtown Photo is proud to offer a 30 day return or exchange policy on most items for a full money back refund, excluding any shipping charges (for items which we offer free shipping, our standard shipping charges will be deducted from any refund or credit)
Returned or exchanged products must be in brand-new, mint condition. Items must be in the original, undamaged manufacturer's packaging with all packaging materials, including instruction booklets, packing inserts, and the blank warranty cards. Memory cards and any other Blister Pack items are not returnable once opened. Any merchandise missing the original Universal Product Code (UPC) cannot be returned. The manufacturer's labeled packaging must be enclosed within an additional shipping carton. Please do not place stickers or shipping labels on the original manufacturer's package.
Please be aware that we cannot accept returns on the following items unless they are shown to be defective in manufacture (as decided by the manufacturer):
- Underwater equipment (once taken underwater
- Inkjet printers (once ink cartridge/ribbon has been installed)
- Processing equipment (once used with chemicals)
- Educational DVDs, Tapes and Books once opened
- Blister-packed items once opened
- Original manufacturer software once opened
Please enclose a copy of your invoice with your return and tell us whether you would like the item to be replaced, exchanged, or refunded.
Returns can take up to 5 days in-house from the date we receive it to process. When returning an item, please make sure you use a shipper which provides you with Insurance and a tracking number. Items returned without a tracking number might take much longer to be processed.
