The future of preamps

If you have it in writting in your manual or other wise that your preamp will not emit Dc at all, its all good to protect my investment!

Audiolabyrinth, I suggest hiring a team of lawyers to review the manual and getting it in writing. LOL!

I've used tube pre with ss amps for years and never had a problem. These are not your grandfather's tube pre. LOL!

@ Atmasphere, Hi, I agree with you 100%, However, Do you have in writting that DC will not enter my amp under no circumstances of what problems that may occur with useage over a number of years?, I can attest that most tube preamps will put out DC when their is a major failure of some sort, LOL!, some brands damage other componets with-in a preamplifier when only the tubes run amock!, not saying your products do that, I have read numerous horror stories of this, right here on audiogon!, Keep in mind, I have, and will still be using particular tube products, To elaborate on this matter further, I have personally have had a respected tube product before, that in no way was suppose to emit DC, IT DID!, I used a volt meter, there it was, my amp was shutting off into stand-by all the time!, I believe your products may not do this, its out there thou!, I also wanted to ask you what a audio signal would be on a volt meter, I'm thinking, VOLts!, not DC?, thanks Ralph, Happy new year!

You have rights to be cautious Audiolabyrinth about protecting your expensive poweramps, I agree get it in writing.

A tube pre if it's output is capacitor or transformer coupled gives some safeguard to precious large power dc coupled poweramps.

But if a tube pre is direct coupled and you get a bad tube or something goes haywire then your dc coupled power amps are in grave danger, even if the pre has output relays which can switch too late.

If something goes wrong, the dc offset in a direct coupled tube preamp premap can be up to 100 x larger that a transistor pre. Your poweramp may survive a dc coupled transitor pre going bad, but not a dc coupled tube pre.

Cheers George

Hi Audiolabyrinth,
If you heard the Atma-Sphere MP-1 I believe you'd absolutely love what it would bring to your system, I'd trust Ralph's assurances (he been doing this successfully a long while). But if you're that apprehensive maybe you should forget about using a great tube preamp.
Charles,

Another thing,
Consider the multitude of people who are using tube preamps with SS amplifiers and this has occurred for many years quite successfully. I believe your contact at Krell planted a needless bug of worry and anxiety.
Good Luck,
Charles,