Midrange texture?

Tube rolling, new interconnects, and the isolation are all something that I would like to try out. Pops, my preamp came with six Amperex 6922 tubes from the previous owner. The markings and silkscreens on the tubes are not identical, and I'm not sure what affect if any they have on the sound. Should I be using six identical tubes? This is my first tube gear, so please send me any recommendation of the type and make of the tubes to use. Sean, Joey, please share your impression on how the isolation device improved the sound. As much as I would love to try out those tweaks my left brain is telling me otherwise. For example I tried lifting my speaker cables off the carpet today using CD jewel cases. I can't be sure if it made any significant difference and I just feel goofy about doing this. :)

Jylee don't feel goofy about the CD technique - I have tried as well and my hearing is not up to noticing an improvement - but I did manage to make my system look silly!

I haven't used 6922 tubes and am not familiar with the configuration of the premier 16 but others will surely have recommendations who have experience with both.

Hi Jylee,

I understand your skepticism.

They seem to lower the noise floor. I can hear more low level detail. I don't hear any change in tonal balance just more details.

I don't have much experience with isolation devices. The only other device I have tried were a set of 3 aurios bearings. I tried these under every piece of equipment I own and noticed nothing benificial. I also hated how wobbly they were.

The Herbies are cheaper and actually work in my system. I tried one set and am very impressed. I've ordered enough for the rest of my system.

I suggest trying a set and if you don't like them your just out shipping because he has a 90 day return policy. I know of no other company that sells isolation tweeks that has a return policy. Its about $65 for a set of four. Compared to the prices of some of the other devices on the market these are a bargin and a half.

Well, well, well.

I've bought three of the Herbie's iso cups with lampblack balls and put them under the preamp. The sound changed A LOT. It's been only a few hours, and I need more time to understand what all these change means, but I just wanted to drop by and express my amazement.

That's cool. I hope they are positive changes. Let us know what you conclude.