The K7 is a compact desktop USB DAC / headphone amplifier that is the same size as the K5 Pro ES, while also equipped with a dual configuration that operates one by one of AKMs latest DAC chip "AK4493SEQ" on the left and right channel, and the audio circuits are used with the top model K9 Pro Eth. This is a new model that supports the balance connection of the headphones that many users demand. The headphone amplifier circuitry also adopts "THX-AAA 788+" technology common with K9 Pro ESS to deliver incredible driving power of up to 2000mW from a compact housing while accurately depicting the music details contained in the signal. Main Features: Equipped with a dual configuration of Asahi Kasei Electronics AK4493SEQ. A fully balanced design from the DAC to the headphone amplifier. Equipped with 2 types of "THX-AAA 788+" headphone amplifier circuits created by FiiO and THX. bit, and Supports DSD256 playback Adopts a clean independent power supply circuit design; ADC volume control function for fine volume adjustments; Equipped with 2 hardware gain adjustment functions; Comes with a variety of inputs and outputs; Can be used in the center of your audio system; Equipped with an eye-catching RGB indicator light; Sleek and simple housing design; Please check the manufacturers HP. Main Specifications: DAC Chip: AK4493SEQ x 2, Amplifier Technology: THX AAA-788+ x 2, USB Receiver Chip: XMOS XUF 208, Digital Input: USB Type B x 1, RCA Coaxial x 1, TOS Light x 1, Analog Input: RCA Line Input x 1, Analog Output: RCA Line Output x 1, Headphone Output: 4.4mm Balance x 1, 0.25 inch (6.35 mm) single end x 1, Supported sampling rate (USB): PCM 384kHz/32bit, DSD 256 (Native), Supported sampling rate (RCA coaxial): PCM 192kHz/24bit / Compatible sampling rate (TOS light): PCM 96kHz/24bit headphones, recommended impedance: 16-30 bit). 0 Ω Output: (Balance, 32 Ω load / THD+N 1 Percent): 2000 mW / Output (single, 32 Ω load / THD+N 1 Percent): 1220 mW / S/N ratio: 120 dB (A-weighted, USB input), THD+N: 0.0028 Percent(headphone output). 005 Less than Percentage (with line output); Noise floor: less than 7.7 uV (balance, A-weighted, USB input); Less than 4.4 uV (single end, A-weighted, USB input); Output impedance: 1 ohm (with 32 ohm load); Dimensions: 4.7 x 6.6 x 2.2 inches (120 x 168 x 5 mm); Weight: Approx. 2 mm); Accessories: AC adapter, Power cable, USB A to B cable 0.25 inch (6.3 mm) to 0.14 inch (3.5 mm) adapter / Quick Start guide / Warranty card *The image is for illustration purposes only. Finishes and product specifications may change without prior notice.