FIIO K11 [Official Product in Japan] Compact Desktop Amplifier with Built-in USB DAC, Balanced Configuration (Black)

The K11 is an entry-level model in compact desktop DAC headphone amplifiers, featuring a slim body, extensive input/output capabilities, and high output. FIIO's "K Series" of desktop DAC headphone amplifiers has been continuously developed over many years, and the latest model, the K11, combines an all-new body design with a fully balanced headphone amplifier circuit that delivers up to 1400mW of driving power for uncompromising audio playback quality. Intuitive operation via the LCD display makes this a high-performance unit that blends seamlessly into any desktop space.

[Cirrus Logic CS43198 DAC Chip Supports 384kHz/32-bit and DSD256 Playback] The K11 utilizes the Cirrus Logic CS43198 DAC chip, which offers low power consumption and excellent audio characteristics. The CS43198 is a Master HIFI DAC that meets the company's stringent standards for delivering audio playback that is truly faithful to the original recording. This chip achieves a S/N ratio of over 123dB and a THD+N of less than 0.00035%.

[Fully balanced headphone amplifier circuit achieves 1400mW output] The K11 features a fully balanced headphone amplifier circuit, with two amplifiers, one per left and one per channel, achieving a balanced output of up to 1400mW at a 32Ω load and up to 250mW at a 300Ω load. Furthermore, to suppress power supply noise that can adversely affect sound quality, the power supply circuit design provides independent power supplies for each circuit block. Power supplied from the 12V external power supply is kept clean by dedicated low-noise LDOs for each block, and then adjusted to the appropriate level before being delivered to each component.

[Three-stage gain control accommodates a wide range of playback environments, from IEMs to headphones] The K11's gain can be adjusted from three levels: High, Mid, and Low, via the LCD display on the front of the unit. Gain is adjusted to match the efficiency of the connected earphones or headphones, allowing you to enjoy music at a comfortable volume level.

[Versatile Inputs and Outputs Allow Use as the Center of an Audio System] The K11 supports digital input via USB, RCA coaxial terminals, and rectangular optical terminals, analog output via RCA terminals, single-ended output via a 6.35mm headphone jack, and balanced output via a 4.4mm jack. In addition to connecting to a PC, you can connect various digital devices to enjoy music with high-quality balanced connections, or easily integrate it into your existing audio system.

[Front-Mounted Display and Knob Allow Intuitive Control of Unit Functions] The K11 is the first FIIO desktop headphone amplifier to feature a front-mounted display. The high-contrast, durable VA display provides excellent visibility and is always-on, preventing burn-in. Visually check sampling rate, volume, gain, and output mode. The front-mounted knob is used for power on/off, input switching, menu navigation, volume adjustment, and other operations. By quickly pushing the knob twice, you can select headphone output or RCA output exclusively, and the last volume of each output can be remembered. You can select the appropriate output mode when connecting to active speakers or when connecting to an external amplifier as a pure DAC.