Alexander Aschenbrenner, HiFi-Stars, concluded:
"...what a debut! I had heard of these 'legendary' tube amplifiers from Wall Audio, I looked forward to them for testing all the more. And when they go back again, the memory of the splendor of their timbre and tonal-color will remain, in a way that I have rarely experienced it with even more powerful tube amps. In my opinion, the Wall Audio M50 PSET Mono Tube Amplifiers are sound-processing technology at its finest. For audiophile friends of high-efficiency loudspeakers, they are much more than simply a recommendation..."
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