Wavelength Brick USB DAC tube rolling?

Restock,
Thanks for your reply. My used Brick came with a Teonex 6067, Google has little or no info on it. I just put in an Amperex 7316, I'm still evaluating that one. I wanted to try the Mullard CV491 as well, the premium tubes get really pricey. I do have the Opticis cable, I like it very much. Someone had posted about using an alternative battery power supply, I'll have to look into that as well.
I did see a few negative posts about the Brick here, but I like mine. I'm using it with an iMac desktop, far better than the Dell desktop I was using it with. Sounds like you're enjoying your Brick, too!

Check with Gordon, he recommends NOT using a battery supply.

Herman, just to clarify, I was referring to an external battery supply for the Opticis cable to replace the inexpensive stock power supply, not for the Brick itself.

Who said something bad about the Brick? It is a wonderful piece...I have one, and I am waiting for my Cosecant-about a month. I love the Brick, haven't tube rolled, heard the same thing from Gordon about it not having a big effect. I would try anyway.

I spoke with Gordon on the Opticis, and he actually scoped it, and said the power supply it comes with is terrible, and adds noise. I quickly returned mine (unopened) upon hearing this from Gordon. He offered to build a linear power supply if I wanted to use the Opticis, but it was cost prohibitive. After weighing all the benefitsa against the ongoing effort, I personally decided it was not worth it. Got the Kimber USB, casedclosed for me. I felt it was smarter to put the $$ into upgrading to the Cosecant-can't wait.

Anyway, the Brick is one heck of a front end, I love it. Can't say enough good about it. I may tube roll after living with the Cosecant for a while.

I need the Opticis cable because my iMac and stereo rig are about 45 feet apart. This is what the Opticis is really for, long USB runs. Didn't want to go wireless, with the potential problems of that. I must say, mine sounds pretty good! I'd love to hear the Cosecant, you don't really see any on the used market.