FiiO K9 Pro ESS, headphone amplifier with DAC

INFORMATION

The FiiO K9 Pro ESS is a premium desktop DAC and amplifier designed for those who seek impeccable sound and functionality. With advanced components and cutting-edge technology, this device is an ideal choice for both audiophiles and professional audio engineers. The K9 Pro ESS delivers not only amazing sound, but also an exceptional experience that opens the door to a world of high-quality audio.

Dual ES9038PRO DAC chips – maximum sound detail with minimal distortion.
THX AAA 788+ amplifier – high dynamic range, suitable for both low and high impedance headphones.
Fully differential design – ensures clear and pure sound reproduction.
Bluetooth support – LDAC, aptX HD and aptX Adaptive ensure fast and high-quality connections.
MQA support – listen to high-quality MQA recordings with master-level audio reproduction.
Wide selection of connectors – XLR, RCA, 6.35mm and 4.4mm outputs, USB Type-C and others.
LDO (Low Dropout Regulator) technology – ensures clean and stable power supply at every stage of the audio circuit.

DESCRIPTION

Headphone amplifier with DAC – a device that can provide your existing headphones with better and more comprehensive sound. Extensive functionality, modern design and efficiency are exactly what the FiiO K9 Pro ESS will provide. It is no secret that these days sound quality is an extremely important feature that every device belonging to the audio equipment segment must have. For this reason, the manufacturer paid a lot of attention not only to the functionality of this headphone amplifier, but also to the processing of the audio signal. The electronic components inside the device are responsible for the processing of the audio signal, which are not only made of materials that are permeable to the audio signal, but also arranged in such a way as to create the shortest possible signal chain. This helps to preserve sound quality and allows you to enjoy really good sound regardless of the style or genre of music you are listening to.

Additional features

Although the electronic components inside are extremely important, that's not all. It is also important to mention the amplifier housing itself, which is resistant to external vibrations and resonances. A solid and rigid housing ensures that the components inside are not affected by factors that could potentially negatively affect the audio signal. The ability to stream audio to the amplifier wirelessly also has a significant impact on functionality. The Bluetooth signal receiver in it will allow you to enjoy high-quality sound without any wires. Of course, the digital inputs in it mean that the device also has an S/A signal converter. Specifically, this model is equipped with a dual ES9038PRO DAC system, which can handle even high-resolution audio formats without much difficulty.

Power amplifier and connectors

Despite its wide functionality, the main and essential function of this device is to amplify the audio signal. For this, the device is equipped with two THX AAA 788+ amplifier modules, allowing you to provide a maximum power of 2.1 W at 32 ohms impedance. The connectors that can be connected to the amplifier are truly surprising with their wide selection. For example, headphones can be connected to this amplifier via a 6.35 mm. connector, 4.4 mm., and XLR. As for the inputs, there are also quite a few of them. This means that you can connect both analog and digital audio sources to the device.

TECHNICAL DATA

Reproducible frequencies (Hz) 20 Hz - 50 kHz
Headphone cable connector 6.35 mm / 4.4 mm / XLR
Bluetooth version 5.0
Balanced headphone output Yes
DAC Chip ES9038PRO*2
Power (mW@16Ω) 1100
Power (mW@32Ω) 2100
Power (mW@300Ω) 281
Power, Balanced Out (mW@300Ω) 1100
Power, Balanced Out (mW@32Ω) 2100
Power, Balanced Out (mW@16Ω) 1100
Weight, g 2750 g.