@tweak1 , thanks for your remark. My LSA GaN 350 Voyager was sent back for the repair, but it came back with the same performance and a worse physical shape (they have broken the plastic frame of the case without even letting me know about it). Do you use the back RCA/Balanced selection switches? Independently of which of the inputs I use, my Voyager sounds more or less acceptable only if one of the channels (the left one) is in RCA and the other one is in XLR positions. Otherwise, the amp sounds like a $100 Sony amplifier from BestBuy. They were not able to or did not wish to spend enough attention to arrange this issue, literally returning the amp as it was (and not precisely, because of the broken case). If you like how it sounds, there could be possible to do something. I contacted Ric Schultz earlier regarding the problem with my Chery Megaschino, he said he cannot help. (but Ralph has agreed very kindly to try to arrange it, but finally, to my surprise, it was repaired for $80 by a technician who is within 10 minutes of driving distance from my house, hope this will last). I will try to contact him though am not too optimistic that this amp may sound good.
@kuribo , honestly, I did not notice any dependence of the frequency response on speaker loads. I tried the Voyager with three different pairs of Thiel speakers in three different systems. The problem is not literally in frequency response (in both high and low frequencies). It rather gives a "dead" sound for my taste. I cannot explain it logically, though soundstage and separation could have been better. Curiously, I enjoy even more Nuprime ST10 class D amp. And there is just no comparison with Cherry Megaschino amp, which I indeed enjoy.