[Lushy Brushy]

I ike my Darkvoice 336SE OTL tube headphone amplifier.
I connect it to the line-output (RCA) on my NFB-11.28.

Wow you have a lot of headphones! Did you swap out the tube or stay with stock?

 

[PurpleAngel]

Wow you have a lot of headphones! Did you swap out the tube or stay with stock?

I spent $25 and swaped out the stock tubes, I bought the tubes so I have spare tubes in case of burn out,
Not sure if I noticed an improvement, but just wanted to have spare tubes.
So the stock tubes are my spares, but so far no burn outs.
In the past five years, I bought about 35 headphones.