Tubes in Hi-End Preamps


I’m confused. If some of you engineer types could pipe in on this subject, it would be greatly appreciated. I know a little, but not a lot about electricity. I’ve been in the battery industry for 20 years and have taken two semesters of college electronics, so I know just enough to be dangerous.

For 15 years, I’ve been sans preamp. The idea being that I don’t want anything messing up the source signal. That limits me to one source only though, and I’ve finally caved in to the need to be able to access multiple sources with the turn of a knob.

It’ll be nice to finally have hifi sound when I watch DVDs, and I would like to spin vinyl again after 20 years away from analog. To that end, I have an Audio Illusions Modulus 3A unit on its way now.

OK, here’s my question:

Why is it that many higher end preamps, Audio Research for example, that are said to be “neutral” and “transparent” sounding use tubes in their designs? Wouldn’t it be a lot easier and less expensive to build a solid state circuit that produces clean, neutral, and transparent sound? Aren’t tubes supposed to “color” the sound?

I've noticed the presence of a lot more equipment out there (the latest generation of some designs) with tube output sections that are described as not sounding "tubey." What's the point then of having tubes?

I hope I haven’t opened a can of worms here.
blumusician
"All active and passive devices add distortions; we simply pick the ones that are most consonant with our inner paradigm of what music sounds like." ... "most of my engineering buddies believe that it's possible to design solid state circuits that will match or exceed the performance of any tube-based preamp"... Which makes you wonder if any of the solid state designers are tinkering with adding a bit of even harmonic disortion to voice for what is percieved as neutrality or as depth in midrange.
neutrality does not exist. it is unattainable. all components are colored. choose your favorite coloration.

unfortunately many allegedly "neutral" components have a character which is evident after extensive listening.
Mr Tennis,

"Neutrality does not exist. It is unobtainable"

Please explain how you know this to be so. Have you heard all the equipment available? Or, as I suspect, are you just making a provocative statement based on a huge surmise, without any factual basis to support it.

Perhaps I'm not familar with your definition of 'neutrality', let alone how I would know if I were in its presence.
I might have to agree with MrTennise. Event the most neutral of components have a sonic signature. Of course, our ability to hear it is another matter altogether.
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