Which Headphone Amp for Sennheiser 600?

I am also using the X-CANSv2 with my 600's. Can you explain to me about upgrading the tubes in the X-CANS?

Grado RA-1 with my Senn 600's, sounds terrific. I like the performance, simplicity, appearence, and the fact it runs off 9V batteries, one less thing to plug in.

I have a Wheatfield HA-2 for sale with a wide variety of upgrade tubes available. It's the top of the line tube amp that Headroom sells. Plenty of power for the HD600s (which I use too) and an extremely dynamic amp. If interested, contact me.

Hi Mcne, on the X-cans II, just replaced the two tubes inside to your choice of 6dj8,6922 or 7308 NOS tubes of your choice.I prefered Amperex 7308 on mine.If you have questions on how to actually open it and replaced the tubes just email me.

The Audio Advancements Earmax or Earmax Pro is great with the the 600's. I have tried the others listed here(with the exception of the wheatfield) and IMO the Earmax is a step up. You can find them used here or on E-bay from time to time for around $300.