FiiO K9 Pro, headphone amplifier with DAC

The FiiO K9 Pro is a premium DAC and amplifier designed for the highest quality audio reproduction. This device is ideal for both music lovers and professionals who seek maximum sound quality and accuracy.

AKM AK4499 DAC chip – ensures high-quality audio decoding up to 384 kHz and DSD256.
THX AAA 788+ amplifier – powerful and clear sound output for both low and high impedance headphones.
Fully differential design – reduces interference and ensures accurate sound reproduction.
Bluetooth support – LDAC, aptX HD, aptX Adaptive and other high-quality technologies.
Wide selection of connectors – XLR, RCA, 6.35mm and 4.4mm outputs.

Stationary headphone amplifier, which also has an integrated S/A signal converter. This modernly designed amplifier and S/A signal converter is a new generation device that allows you to enjoy high-quality headphone sound for listening to music and any other audio content. The new generation FiiO K9 Pro headphone amplifier is stationary, so it is perfectly suited for connecting to a wide variety of external devices. The abundance of various connectors on the back of the amplifier allows you to easily connect the device to both a computer and a TV. The manufacturer's decision to integrate many different connectors into the amplifier itself gives this device versatility, which is particularly appreciated these days.

Convenient amplifier control

Like most such amplifiers, the K9 Pro also has a built-in potentiometer for volume control. Although this solution can be safely considered a classic, it still remains one of the most convenient ways to quickly set the desired sound level. The front panel of the amplifier also has buttons for selecting the sound source. With the help of these buttons, you can change the desired sound source instantly. Meanwhile, the abundance of connectors for connecting headphones will allow you to connect headphones with both XLR, 6.3 mm, and 4.4 mm balanced connectors. It is also convenient that the K9 Pro has an integrated Bluetooth transmitter, which will allow you to connect headphones wirelessly. Special Bluetooth Low Energy technology also allows you to control the device using an app.

High-quality body and internal components

Like most other electronic products in the audio equipment segment, the sound quality of the FiiO K9 Pro is also most influenced by the internal components and materials from which the device itself is made. For this reason, the manufacturer FiiO uses only the highest-class materials and components for the production of internal structural elements. This helps to ensure their good signal throughput and all protective technologies that allow to minimize the influence of the environment on the audio signal itself. Meanwhile, the body of this headphone amplifier itself is made of solid metal, which helps to ensure the durability of the device and additional resistance to possible environmental factors.

Reproducible frequencies (Hz) 5 Hz - 50 kHz
Headphone cable connector 4.4 mm ; 6.3 mm
Bluetooth version 5.0
Balanced headphone output Yes
DAC Chip AK4499
Power (mW@16Ω) ≥1.1W
Power (mW@32Ω) ≥2W
Power (mW@300Ω) ≥278mW
Power, Balanced Out (mW@300Ω) ≥1.1W
Power, Balanced Out (mW@32Ω) ≥2W
Power, Balanced Out (mW@16Ω) ≥1.1W