FiiO K9Pro Amplifier for Headphones - High Resolution Bluetooth Portable Desktop

The FiiO K9 Pro ESS is a versatile desktop audio solution that combines high-performance digital-to-analog conversion (DAC) and amplification capabilities. Equipped with Bluetooth Low Energy (BLE) technology, the K9 Pro ESS allows users to control various functions, such as filter selection and channel balance, through the FiiO Control App even when not in Bluetooth mode.

Designed to handle power-hungry headphones, the K9 Pro ESS can drive headphones with impedances ranging from 16 to 600 ohms, making it a suitable choice for a wide range of audio gear. As a desktop USB audio combo, the K9 Pro ESS can be easily connected to your computer, laptop, or other audio players, allowing you to enjoy high-quality, lossless music playback.

The K9 Pro ESS also integrates seamlessly into your home audio setup. With its RCA and XLR balanced line outputs, you can connect the amplifier to active speakers, monitor speakers, or external amplifiers, delivering a high-resolution sound experience.

At the heart of the K9 Pro ESS are dual ES9038PRO DAC chips, designed for maximum performance in desktop-grade equipment. These chips, with their 8 parallel outputs per channel, contribute to the amplifier's rich, detailed sound with minimal distortion. Furthermore, the use of THX AAA-788+ chips ensures exemplary details and dynamics, regardless of the headphone impedance.

The K9 Pro ESS also excels in the wireless domain, employing the Qualcomm QCC5124 Bluetooth chip to support high-resolution audio formats such as LDAC, aptX HD, and aptX Adaptive. This ensures reliable and low-latency Bluetooth connectivity, catering to both gaming/video and high-resolution audio needs.

To maintain the highest audio quality, the K9 Pro ESS utilizes a dual-mode clock management design. Under USB and Bluetooth decoding, dual asynchronous femtosecond clocks are used, while under optical and coaxial decoding, automatic PLL clocks are employed. This precise clock management system helps to handle various input sources and preserve the maximum audio quality.

Complementing the high-performance components, the K9 Pro ESS is equipped with a high-performance linear power supply and ultra-low-noise LDOs for voltage regulation in each stage of the audio circuit. This ensures exceptional power stability and filtering, contributing to the amplifier's excellent sound quality.

For optimal headphone pairing, the K9 Pro ESS offers selectable high, medium, and low gain settings, allowing users to find the perfect balance between dynamic range and musical fidelity.

Designed for desktop use, the K9 Pro ESS features a convenient USB Type-C port and comes with a custom stand to save space on your workstation. The amplifier's rich accessory bundle includes a power cord, USB cable, headphone jack adapter, Bluetooth antenna, and various documentation.

In summary, the FiiO K9 Pro ESS is a versatile and high-performance desktop audio solution that seamlessly combines DAC and amplification capabilities, catering to the needs of discerning audiophiles and music enthusiasts.

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