The S7 Pro is the 2nd gen of the S7 balanced headphone amplifier. It spots a simple and smooth arc shape design. With two levels of gain control, two groups of balanced headphone ports and a 6.35mm headphone port as well as the inclusion of four ultra-low-distortion high-power modules, the S7 Pro can handle most headphones and earphones. It is a powerful balanced headphone amplifier with a wide range of compatibility. S7 Pro adopts the second generation AMP output module. The S7 Pro is the upgrade edition of the S7. It adopts the 2nd gen AMP output module which has ultra low internal resistance. Plus, the tuning is optimized to an even higher level. The S7 Pro uses the Titans Artemis´amp circuit, which is critically well-respected globally. The S7 Pro adopts a balanced and ultra-low distortion amplifier circuit framework, the innovative multi-stage parallel powerful driving mode, and the custom driver modules. It is a combination of great power and beautiful timbre. The S7 Pro has inputs of single-ended RCA and balanced XLR. It can be connected to a variety of audio sources. One button to change inputs and adjust gain. Convenient and user-friendly. With two levels of gain control, the S7 Pro can drive most headphones and earphones on the market wit ease. The S7 Pro has a simple and smooth arc shape design. The unique appearance has been patented. The tuning is based on real instrument sounds and musical content referencing, resulting in a signature that is natural and full of musicality. With the processing of aluminium CNC, laser engraving, etc, the S7 Pro is well-built, sturdy and durable.