In addition to just looking cool, the open-air design lets in more air flow and results in optimal cooling. Set in the middle of the device, a Shu Guan 12AU7 tube produces a warm sound signature that brightens up your music without blowing it out. This makes it the ideal dance partner to a darker set of headphones, like the Sennheiser HD 650. As the V2 uses 12AU7 / ECC82 standard tubes, the parts can be easily swapped out if you’re into tube rolling.