Bypass preamp, better sound, yet fatiguing?


Does anybody know a good reason why running from the CD player direct into the amp will produce a better, detailed sound (e.g., piano sounds more real, instruments are better separated), but on the other hand, after a while, after an hour or so, the sound becomes fatiguing?

Is there any thing as too much detail?

System consists of Levinson 390s, 380s, VTL MB-450, B&W 802n. Interconnects are Transparent super. Speaker cable is Transparent super bi-cable.

Are the cables not up to it? Room acoustics? B&W tweeter to bright? I don't experience any fatigue, if I listen through the preamp, but the sound is somewhat duller (but better rythmically) than if I go direct. Any suggestions are welcome.
hgabert
I thought that there are thousands of people using tube preamps and SS amps...
Hgabert,

Maybe I interpreted your original post incorrectly. You stated that without the preamp you are experiencing greater detail.

But is it possible that you are using the term fatiguing when perhaps boring could be more appropriate?

Generally, fatiguing occurs with ears bleeding, overly bright, or beaming, or anything else that causes the ear to dodge certain sounds or frequencies.

Boring is like elevator music where it may seem soothing and pleasing at first but after a time, the lack of dynamics tends to make one fall asleep?

-IMO
I will have to agree with Hgabert here Stehno, I have the same fatigue "problem" running my DAC direct into the amps.
which you described correctly "ears bleeding, overly bright, or beaming, or anything else that causes the ear to dodge certain sounds or frequencies."

I had some firends "audio buddies" over last night with a tubed preamp which stated exactly the same views, fatigue... saying details shouldnt be at the same volume as main instruments, we added the tube preamp (high quality DIY) and while they loved it, I hated it, all detail was gone the voices were harsh and soundstage was all muddled in the center...well a bigger center image yes, but less everything else...

Impedance matching should not be the question here since my DAC has an output impedance of 50 ohms and my Stepped resistor attenuator has 1k input impedance, the rule states 10 times the output impedance which makes it 500 ohms, to 1k I am at 20 times...

I have tried a lot of tricks because I am getting hooked on this transparency thing...I changed most resistors in my amps to Tantalum which leaves detail and no harshness but takes away the edge...I need at least a little silver on my cables to get the highs I like...the less the better.
I have an Isolation transformer which could run the whole house, for my audio only, 220V to 110V, getting rid of the ground and that helps with harshness...
I will try to Isolate the digital sources also...thanks for the tip!

I found that a very good SS preamp was detailed and dynamic very enjoyable, but the direct option is "HIPNOTIC" just a bunch of music and details surrounding you!!

I am thinking a well implemented buffer stage like Placette active or the First Sound preamps will do the trick!
Anyone heard them?
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Jsadurni, I wasn't necessarily making a statement in my last post. I was really seeking clarification on his use of the term fatiguing by asking Hgabert a question.

But if we're talking a truly ear-fatiguing sound that can cause the 'ears to bleed', then (assuming the tweeters are of good quality), in my experience the biggest culprit by far is improper or no line conditioning and secondly ics and scs that induce much time-smear causing a digital-like grain or hash in the highs and a bloated, ill-defined bass.

Since you say you are experiencing this ear-bleeding problem, would you care to share what line conditioners, ics, and scs you are using?

-IMO