I have a pair of Devore Nines, and recently owned a Leben CS300. For reference , I do also own a Nait XS and ARC 100 watt amp. That said, I did not find the CS300 had enough power for all types of music. Simple music, yes, it was fine. But I like to rock out occasionally, and the Leben did not have the power for that. I replaced it with a new EL34 amp being imported by the same folks who import Shindo and Leben (Tone Imports?). It is a high quality Chinese made amp by LM Audio. I bought it from Don Better Audio for $1650, plus another $50 for upgraded input tubes. This amp is triode/ultralinear switchable for 15/32 watts, and has plenty of power for the Nines. I upgraded the tubes to KT77's for another $200, and it sounds great! But it was great even before the KT77's. If you Google LM Audio, you can check out the company. I see them as a Chinese Shindo. I have owned a few Shindo pieces, and am VERY impressed the LM Audio amp. You cannot go wrong with this amp. Plus it has remote control! That is important to me. I want to be able to adjust volume from my listening position, because with really nice gear, things just seem to really "click" with the right volume level.