Topping NX1s review: tiny is good - Soundphile Review
Headphones in Pictures: VE Asura 2.0 and Topping NX1s - Soundphile Review
BOX Techs - Topping Nx1s * First of all, build of Topping Nx1s incredibly solid: in fact it shows the company's attention to detail, as the junctions between the three aluminium pieces