FiiO / K3OLD

FiiO K3 is a desktop headphone amplifier with a built-in high-quality USB DAC that supports playback of up to 384kHz/32bit PCM data and 11.2MHz DSD data.

■Equipped with high-performance DAC chip “AK4452” manufactured by AKM (Asahi Kasei Micro Devices)
■Equipped with a 3.5mm single-ended output terminal and a 2.5mm balanced output terminal with a fully balanced headphone amplifier section.
■Uses a custom-made headphone drive operational amplifier ""OPA926"" to achieve a large output of 320mW (at 16Ω)
■High-performance audio circuit with independent LPF/volume/buffer stage is adopted.
■Equipped with a USB TYPE C terminal with power filter and overvoltage prevention function
■Adopts a volume adjustment mechanism using an innovative electronic volume method to eliminate gang errors.
■Equipped with Bass Boost function and gain setting function
■Equipped with USB Audio Class switching function
■Equipped with optical digital output and coaxial digital output, can also be used as DDC

■USB: Type-C
■USB Audio Class: UAC1.0 /UAC2.0
■Volume adjustment: AD conversion
■Gain switching: L/H
■Bass boost: 0/+6dB
■Line output: 3.5mm
■Headphone output 1: 3.5mm single end
■Headphone output 2: 2.5mm 4-pole balanced
■Coaxial digital audio output: RCA terminal PCM 192kHz, DSD64 (DOP output) compatible
■Optical digital audio output: up to 96kHz
■USB chip: XMOS XUF208
■USB driver: ASIO/KS/DS/WASAPI/DSD DOP (native)
■DAC: AKM AK4452
■Drive operational amplifier: OPA926x2
■Output 1 (3.5mm single end): 220mW (at 16Ω load), 120mW (at 32Ω load)
■Output 2 (2.5mm 4-pole balanced): 320mW (at 16Ω load), 200mW (at 32Ω load)
■Line output level: 1.9Vrms
■DAC: 384kHz/32bit
■DSD compatible: DSD256
■SN ratio: 113dB or more
■THD+N: 0.004% or less
■Frequency characteristics: 20Hz-80kHz
■External dimensions: 70 x 58 x 22mm
■Weight: 82g