Ultra-Low Distortion Linear Feedback Circuit. The SH-6 features an ultra-low distortion linear feedback circuit that provides exceptional sound signal amplification characteristics by achieving class-leading distortion and noise ratings. It achieves an ultra-low distortion rating of 0.00006% ensuring clean output for the users. Classic Design With Toggle Switches. S.M.S.L SH-6 has simple and stylish looks with CNC milled chassis. The device adopts a classic retro design with toggle switches on the front. Both the on/off and Gain switches have toggle knobs. Powerful Enough To Drive Demanding Headphones With Ease. S.M.S.L SH-6 is a powerful and clean headphone amplifier. It houses a 6.35mm headphone output with a tremendously powerful output rating of up to 2.6W at 16 of load. At 32 of load, the SH-6 achieves 1.3W of output power rating adequate enough to drive demanding headphones with ease. The device has a 2-level gain switch, the low gain has 0dB gain and the high-gain provides 15.5dB of signal gain. Premium Components Ensuring Premium Performance. In the world of audiophilia, quality components are required to deliver quality performance. S.M.S.L has years of expertise in designing high-performance desktop gears. They have used that experience to design the high-quality audio circuitry in SH-6 using high-quality components that include a built-in low noise power supply, high-quality relays, and other premium components. Technical Specification : Output Power : 1.3mW x2 (32) SNR : 134dB Output Noise : 1.3uV THD+N : -123dB, 0.00006% (1kHz, 32) THD+N : -118dB, 0.00012% (20-20kHz, 32, 0dB) THD : lt; -125dB, 0.00006% Input impedance : 47k Amp output impedance : Near 0 Pre-out impedance : 22k Frequency response : 20Hz - 500kHz (-3dB) Gain : Low (0dB), High (15.5dB) Power consumption (EN60065) : lt;30W Inputs : RCA Headphone outputs : 6.35mm unbalanced Pre-output : Unbalanced