I've had a Calypso for about 3 years and it's been my favorite preamp by far vs. my previous preamps, which included the Joule LA-150 & BAT VK30. It responds big-time to tube rolling, but sounds only so-so with the stock Sovtek's. You HAVE TO tube roll with good NOS tubes to get the most out of this unit... but it's worth the effort and expense.
Disclosure: I've recently sold my Calypso, but only because I've gone to an all tubed integrated (McIntosh MA2275).
Disclosure: I've recently sold my Calypso, but only because I've gone to an all tubed integrated (McIntosh MA2275).