From an audio out perspective — alongside the 6.35mm single-ended, 4.4mm balanced, and 4-pin balanced XLR headphone connections — the FiiO K9 Pro ESS also features RCA (L/R) line-out as well as ...

Headphone users are well catered for, with the R9 offering single-ended 6.35mm, balanced 4.4mm, and balanced 4-pin XLR outputs, which should support most headphones out there. The FiiO K9 is a ...

If you’re the kind of person who owns more than one high-end headphone, the Rogue Audio RH-5 is the amp for you. Ex-movie theater projectionist Steve Guttenberg has also worked as a high-end ...