Quote Originally Posted by blackraven
Beautiful looking amp! Gives us some specs!
Hi, sorry to be so long in posting the specs, but since I didn't buy it new, and all the documentation I have is in Chinese, it's been hard to really come by specs!

After talking with the former owner, a guy who currently has several tube amps, some of which he built himself, the amps nominal rating of 75WPC is VERY conservative. He would rate it more as >90WPC based on the plate voltages, with it easily able to reach 120W on the peaks. Speaking of which the amp's voltages were significantly higher than the supplied 6550 tubes like. Getting 1000 hours out of them would be pushing it at this voltage level. The Gold Lion KT88's that replace them are much more robust, and can take the higher voltages (and resulting output) without problem. He told me to expect 2000 hours or more from these tubes. He also said the closest American made tube amp to this design is the McIntosh 275. He also said that he had a MC275 for several months and on his bench it measured higher in distortion than the MingDa! I can't confirm any of this but I can tell you that the amp sounds CLEAN. I know what distortion sounds like, and this amp is easily under ~1% for loads that reach 95+ dB with my speakers. Speaking of which, my speakers are not the most efficient. Some have called them watt pigs. Certainly people have them hooked up to Musical Fidelity KW amps with good results, but as I write this I'm listening to the MingDa in Triode mode at 70dB-80dB and it's sweet as Tupelo honey.... So for better or worse I'm a "tube dude" now. My SS amps have been relegated to the HT system.