Your single most significant purchase mistake?

Goldnote PA-10 I ran them as mono-blocks and after 500 hours they sounded worse. Sold them and the guy who bought them loved them. ???

One mans garbage is another mans gold...note.

I love McIntosh (despite all the hate they draw) and still own it, but the MC7106 I bought years ago could not leave my home fast enough. Granted, it was a 6 channel amp designed for HT, but could be bridged to the tune of 320 watts of bad sound for even more bad sound headroom. I'm not sure I would even use it for home theater.

@yakbob,

I bet it was made during their Clarion years. 

Paradigm Persona 3f.  Had been out of audio for a while. And went to try the golden ear speakers.  My wife loved the paradigms. To me they seemed to detailed, so we initially passed.  Went back to try some other brands but this time the anthem streamer wasn’t working and it sounded more neutral on nad.  Still wanted to hear others.  I know it’s my fault but really succumbed to sales “pressure” and basically got the combo amp and speakers for less than the speakers.  Was ok, and eventually used the nad as a preamp streamer into a spectral amp.  Needed to get a new cartridge and heard another brand of speaker and was blown away.  Despite the retail price going up 2k no one wanted the persona at 1/2 price in mint condition 

Paradigm studio 100 s great review and they were a total pos. The trashcan tweeters really made them the complete junk that they were! Just another crappy Canadian speaker.