phase control on BAT VK pre amps

Ok . Thanks for that advice. I have the VK40 solid state unit which sounds great! I will leave it on as you suggest unless I'm going out of town for a few days. Even in standby mode it takes about 50 seconds to warm up enough to use . I Havnt noticed if the sound gets appreciably better the longer it's left on after that. I've actually just gotten the unit so not too familiar with it yet. I used to keep my Pass Aleph P preamp on all the time! Heck, it didn't even have an on / off switch!! I guess Nelson knew what he was doing!!
Thanks

I find little or no difference with phase switch

It took me years to finally hear it with any consistency. To me, it sounds like a timing issue. Either way, the difference was fairly small.

If there is little to no difference using the phase switch it
simply means your overall resolution-coming via your entire
system through your speakers-is not as refined as it should-and
can-be. Power cords, i/c's and speaker cables are all vital
(though many feel they aren't)
A power conditioner or 2 may (pre & digital source)
be the best place to start experimenting; but poor power cords
can make a significant difference! Try out some excellent power
cords on your source, pre and amp. It's hard to guess which
will benefit most; relates to each units self isolation and
power supplies. I find the MIT Oracle AClll-a non networked
powercord extremely good in my reference Spectral system-a vast
improvement over anything stock. Have you bought a $15 polarity
tester to check your electrical outlets? I wired incorrectly
negatively affects the clarity of your whole system. JFRECH,
looking at the amazing ROCKPORT speakers you own you should
hear the difference very clearly. It's all about resolution and
your speakers are like Ferrari's(and no, I've never even seen
them-and don't need to-but hope to hear them someday). Zd,
you're right; it's all about timing; and it may be said that to
most the difference may be small,inconsequential. I've had
guitarist friends who wouldn't notice anything out of place
with their gear unless it was an utterly annoying hum or
feedback issue. Polarity? Phase? Neither would never bother
them. They're in a loud environment where the set up is
virtually guaranteed to be never perfect. Ah, but for us, we
have our quiet room, comfy seat and time to listen! Cheers.

To summarize the reality of correct phase. When your system is tuned up and more/fully revealing playing in "reverse" phase to the way it was recorded simply sounds slow,dull,boring. In correct phase -gives the goosebumbs music is famous for. ;-). Would someone kindly turn out the lights? Ahhh