The sound appears to be a little more detailed, but slightly less bassy. It’s most common to … How you get to those 72 hours is completely up to you and how many sessions you are willing to tolerate that hum. For those of you who don’t know, La Figaro is a Chinese based company run by a guy named Liu Yi also known as “Yuking09”. I’m very new to tube amps, so that’s why i’m struggling to find answers. I have a question if you can please answer for me a Jan Philips 6922 with green writing on the tube is the same quantity or is the same tube with the blue writing a better tube. Do you leave it 72hrs straight or power it off each X hours for Y hours ? However because you notice it is still reducing, I do think it’s only a matter of time before it’s perfect. You can basically tune this amp to your particular musical preferences and hearing tastes by rolling various tubes to see which ones sound best to you. This burn-in technique worked like a charm for the Tung-Sol 6SN7GTB and NOS GE 6SN7 I bought. We would suggest swapping that tube out and see what happens. The Darkvoice 336SE Tube Headphone amp is an Output Transformer-Less (OTL) tube headphone amp that has been designed to provide clear sound and amplification. Sadly it looks like its the 6SN7 and I’m well beyond my return date (not that I mind keeping it, looks cool). I guess I’ll let it go for a bit longer, but I’m starting to think that no amount of burn in will completely eliminate the hum. I personally have used AKG, Sennheiser, Master & Dynamic, Beyerdynamic, Audeze, Oppo and Grado (to name a few).

Darkvoice 336 tube rolling