My experience agrees with what Blueswan points out. I owned a Simaudio Moon I-5 integrated for a year and also acquired an Electrocompaniet ECI-3 one month ago. I compared the two amps for three weeks.
The I-5 could at times be utterly brilliant, but sometimes exhibited an upper midrange glare and glassiness through my ProAc Tab 50 Sigs. While I was often enthralled with the I-5s qualities, I sometimes found my self cringing at the occasional brightness. Rock was almost unacceptable through the I-5which sounded lean and bright, which isn't a good companion to loud music. On the other hand, soft passages were remarkable with the Simaudio.
The ECI-3 on the other hand is never bright, and therefore condusive to long listening sessions without fatigue. I sold the I-5 and now live happily with the ECI-3. I sometimes miss the magic of the Simaudio, but the Electrocompaniet does indeed have magic of its own. Much of the air and soundstaging of the I-5, with a fuller and more natural midrange to boot. Plus the added benefit of no listener fatigue.
I think the difference was in part due to the slightly lean balance of the I-5 in comparison to the ECI-3. But I also don't discount the possibility of system synergy such as source, cables and isolation and not to mention "hot" room acoustics.
The I-5 could at times be utterly brilliant, but sometimes exhibited an upper midrange glare and glassiness through my ProAc Tab 50 Sigs. While I was often enthralled with the I-5s qualities, I sometimes found my self cringing at the occasional brightness. Rock was almost unacceptable through the I-5which sounded lean and bright, which isn't a good companion to loud music. On the other hand, soft passages were remarkable with the Simaudio.
The ECI-3 on the other hand is never bright, and therefore condusive to long listening sessions without fatigue. I sold the I-5 and now live happily with the ECI-3. I sometimes miss the magic of the Simaudio, but the Electrocompaniet does indeed have magic of its own. Much of the air and soundstaging of the I-5, with a fuller and more natural midrange to boot. Plus the added benefit of no listener fatigue.
I think the difference was in part due to the slightly lean balance of the I-5 in comparison to the ECI-3. But I also don't discount the possibility of system synergy such as source, cables and isolation and not to mention "hot" room acoustics.