I had the opportunity to try the 509X at home with my system and I was impressed. Loads of power and lots more to spare with my Spendor D9's. Very fluid and smooth. I felt the music reproduction was very dynamic and I could see why people love this amp. Coming from a strong tube amp like the 805ia though, I did miss some of that magic that the Line Magnetic provided. I preferred the 590AXII to the 509X without question.
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