How close to the real thing?

You're treading on dangerous turf, Phaelon, he says rolling his eyes. :-) Tube amps sound different from solid state amps for measureable, predictable, understandable reasons that can usually be explained by effective differences in the amp-speaker combination frequency response. The only way to tell if someone thinks a sound is "live" is by using a blind test and seeing if he or she can repeatedly correctly differentiate. I've never seen a metric for determining "live" has been achieved.

5% is a bit harsh , i would give the very best 45% of the real deal and figure on that system using at least 2-3 kw of power to get to that 45% figure...

Onhwy61, that may be so. When I got the U67s nearly 30 years ago, I knew they were great mics, but had no idea how really great they actually are.

As our equipment for recording and playback has improved, I've really come to realize that microphone technology may well be one of the areas that was well advanced beyond the rest of audio world by several decades. That simple fact is, if you have mics of this quality, you don't need 'signature' or 'reference' as descriptors :) They just work.

One time I did an on-location recording with a pair of RCA ribbon mics. I had a couple of audiophile friends with me that wanted to see it being done. At one point, I had to move the mics a couple of feet. One of my friends was wearing headphones, listening to the live mic feed. Since ribbons can be fairly sensitive, when I got to the mic stand, I said 'I'm going to move the mics now' so he would be prepared for some noise.

When I was done and got backstage again, he was in a state of shock. He had seen me go through the stage door, and then a few seconds later, he heard me *behind* him (at the point where I was ready to move the mic stand). On wheeling around, wondering how I got back behind him without him knowing it, he saw I was not there!!

Now this was a jaundiced audiophile, and training to be a conductor (currently conducting in Moscow) and *knew* that audio equipment could never sound that real. I'm telling you, he nearly had a heart attack.

"You're treading on dangerous turf, Phaelon"

Thanks for the warning Irvrobinson.

You're not being fair. Are we talking about measurements or listening? You can't talk measurements on the "does it sound like a tube debate" and then switch to listening on the "does it sound real" debate.

You're not suggesting that there are perfect components that add or take away nothing, are you? If not, then a difference can be measured. And if a difference can be measured, then you have to give it the same weight as you did to tubes. Ha! :-)

"You're not being fair. Are we talking about measurements or listening? You can't talk measurements on the "does it sound like a tube debate" and then switch to listening on the "does it sound real" debate."

Actually, that's exactly my point. We *know* why tube amps can sound different, but the *opinion* that the playback of a recording sounds real is only measureable by measuring the individual human - in other words, can they tell the difference in a blind test? Perhaps it was you that confused me in your comparing this thread with the tube versus solid state threads.

Nonetheless, are you saying the blind comparison test would be an invalid measurement strategy?