It's been about two weeks since the Calypso has been in my system, and IMO, it's a very close race between these two pre's. I'm sure some of you will think I'm nuts, but in my system and room, and to these ears, it's close. The Calypso does do many things better than the LS25, but not everything. Unfortunately, I have not had the opportunity to do a tube shootout. I did receive the Tesla warranty replacement tubes, one of which was noisy. But I was able to make a quiet pair between the original Tesla's and the warranty replacements. I ran all this past weekend with the Brimars installed. I'm not the greatest at throwing around esoteric audiophile terms, but I'll try to describe what I'm hearing. The Calypso definetly accels in the area of vocals, especially female vocals, which have never sounded so lush and realistic in my system. And I would say the Calypso wins in the area of soundstaging and imaging. Also, I'm able to hear small details in the music much better, micro and macro? I havent decided if it's smoother or any easier on the ears just yet. The one area I feel the LS25 is beating it in is bass, believe it or not. It's not so much a lack of bass, but it's different, and I can't quite put my finger on it. But in all fairness, my LS25 has who knows how many hours on it, compared to maybe 150 hours for the Calypso. Perhaps this is playing a part? Also, I havent spent any serious time with the other tube sets. I also have not tried any iso devices under this pre, although I run my LS25 on it's stock footers. The only iso device I have are Daruma III's under my cdp (I'm waiting on a Nueance platform for cdp). A buddy is going to let me try his Aurios Pro's under the pre. I'm using a 3' Harmonic Tech Pro AC-11 pc, and I'm wondering if the Calypso may benefit from a different pc. And I have not attempted to reposition my speaks at this time (although, this has proved futile in the past). I guess what I'm saying is that I'm on the fence with this as they are both great pre's, IMO. In fact, it's so close that this is gonna take me weeks to nail down and I'm not ready to part with the LS25 at this point.
I may even have to pull the stupid TV off the top shelf of my rack and do a pre shootout.
I wanna like the Calypso more than the LS25, it's a thing of beauty, love the numeric volume readout, display dimmer/off, standby mode, and it's easy to service, i.e., change tubes.
I'd really like to hear commentary and/or suggestions from other Calypso owners...