Hello All,
My current system consists of:
Quicksilver v4 monoblocks using GEC Ki88's (new issue)
The Truth preamp or Bottlehead BeePre running GEC 300b tubes
VPI HW-19 Mk IV with a Woody String Theory tonearm and a Soundsmith Zephyr cartridge.
A Bottlehead Eros phone preamp
A Cinemag 1254 SUT
A OPPO 205 CD Player
Speakers are DIY Watt Puppies
I switched from the Eros preamp to the Truth preamp. While the Eros was very nice it had a little glare in the treble. The Truth cleared that up plus the bass was deeper and more defined, the soundstage was bigger and more precise. So in my system it definitely improved the sound quality.
Arthur Salvatore @ High-EndAudio.com gives a very good explanation of why this might be. He also gives a good explanation of the technological aspects of the Truth preamp.
Hope this helps.
Richard