Feedback by Tube Model- KT88 all types

Treasure KT88-Z: ‘I’ve heard black and I’ll never go back.’

Feedback from customer Wayne:

Hi, Grant Fidelity–

Well, I finally got round to getting my new tubes installed in my MAC 275 this past weekend. Rather than run on at the mouth let me just say this. I’ve heard black and I’ll never go back. WOW!
Wayne