I do not know where to start. Solid structural properties? the way complex configuration is handled well? or the sound? Without going into these details, I think it is important to emphasize that the company has had hardcore fans in the Hi-Fi iem community for years and that it takes serious care and work to maintain it. Thanks again to everyone who has delivered this product to our team for review. Website: http://www.bgvp-hifi.com/ Specifications: • Frequency Response Range: 10-45000Hz • Sensitivity: 111 dB / mW • Impedance: 32Ω • Plug...