Yep, I had a recent thunderstrike upon inserting the recently-arrived Lamm LL2 Deluxe into the rig. "What's missing?" turned into "Yeeeaaaahhhh!" No joke. I think it's more than electrical signal conditioning but I couldn't prove it even if you were pulling off my toenails to do so.
Vladdy really hit the nail with the LL2 Deluxe!
That is just a real texture-master! You know when you touch an instrument with your fingers, knock on it slightly, say a violin, then you give it a yank with the bow, all that sound and vibration just oozing into you cheek! That kind of texture and finesse!
I do like the LL2 Deluxe! Don't own one, but it's an incredible and (

sort of cheap ) little pre!
Tube roll:
6X4 rectifier : Mullard (Blackburn plant, 1960/1961) some 30 to 40$ a pop.
12AU7A : RCA; 5963, 60's... some ca 25$ a pop maybe. /60's clear top 12AU7A's some 60$ a pop..
You also have Mullard CV-4003 (M8136..) , powerfull dynamics...
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I have a M8162 tube. Very good! (in an Earmax Pro) The Mullard M's are generally very good!
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6DJ8 : Mullard Blackburn's... / 7308 Amperex PQ's /
Yup, stuff to look into for the LL2.. and DO TRY SYSTEM OF A DOWN on your system with this pre!!!

Yeah!!! Don't forget "Roulette" either!! A track with very deeply interwoven textures of voice and strings!
And of course, Victor Wooten's "Amazing Grace" Slap Solo! (live version). A must hear with this pre!!!
Beg - Steal - or borrow, treat yourself to this!!!
Check it out! Preferably Budapest 2007.
Also the track "Glorious Pastorius" from Bass extremes is a classic with wooten.
Imperial