Anyone heard of DK design group?

Philips SQ 6922 will get you an ever-so-slightly softer top and slightly recessed mids. Still an excellent sounding tube...it'll just get you to the warmer side of neutral (as opposed to Amperex 7308/6922 or Siemens 7308/6922). I don't have experience with Telefunken or Mullard.

The top cover is a thick aluminum panel with four holes near the front over the power transformers. Under the cover is an identically sized black mesh screen. You can remove the cover altogether and use just the screen, which lets you see the tubes glowing in their cages near the back of the amp. It also provides better ventilation, although that's clearly unnecessary as the amp runs very cool.

I don't believe the cover positioning is a misake. The cover probably is positioned with the holes toward the front to provide convection cooling for the two power transformers. Convection cooling for the tubed preamp section is provided by openings in the rear panel.

Hello, Telescope trade

I also have the HPS 938 and am interested in the DK.
Do you use biwire or single? And what speakercable do you have?
Thanks from Holland

Does anyone have the physical address for Blue Diamond Audio in Nevada---a dealer for the DK-VS1 Mk II integrated. I need to send them something, and they won't return my calls.

They do not list their address on their website.