Comparable to NOS
Compared to the standard EH 6922, the gold version has noticeably less hiss. I mean it's dead quiet. Otherwise, its sonic character is very similar to the standard version. I compared it to Brimar Mazda 6FQ7 in a headphone amp I built, from the design of Bruce Heran of DIY Audio Projects. It's a different type of tube but both are interchangeable in this amp. The NOS tube gave a more lush midrange, but the EH excelled in dynamics and high frequency extension. Arguably, it tied the esteemed NOS tube in performance, but costs less than half as much.