What are some of the mistakes, failures or bad purchases of your audio history?

I've had my share of recalcitrant gear over the years, but I'll just talk about the stuff that's happened lately. My Mytek Brooklyn Bridge streamer/DAC sounded great and even had a very good phono input, but it went belly-up maybe two days after the warranty lapsed. Neither Mytek nor the folks I bought it from, M**** D****, wanted to touch it. This was even after I said I'd pay for shipping and out-of-warranty repair. In any case, ever since, the device has been a veritable brick, sitting silently in my garage.  Its replacement, a Cambridge CXN, works fine. So does the old Moon phono step-up that I fished out of the closet so I could play my records.

And oh yeah, maybe just under a year ago my PS Audio AC junction box started to smoke. Luckily, my wife worked as a film editor and happened to possess a pro-level, movie industry replacement. And you know what? The replacement junction box garners me slightly better sound.

My Marantz CD/SACD player went south, as well. Also not long after the warranty expired. Then there were the bad set of tubes I got from Upscale Audio. But in sharp contrast to my other adventures in the high end world, Upscale Audio was jet-quick in sending out replacements. I love those guys!

Sometimes there's value in the journey, but with hindsight being 20/20 I could have skipped the detour on my way to owning my Pathos Classic One MkIII.  I saw the Pathos in a local shop used and while it was a great price, it was more than I was in the market for at that time.  Instead, I decided to scratch an itch purchased a Cambridge Audio 840A with the hope that the home theater bypass would give me the best of both worlds with my home theater receiver and stereo.  It always made noise when connected as a power amplifier and I simply did not enjoy its sound.  The silver lining was that while trying to determine if it had an incompatibility or an actual problem I picked up a Cambridge Audio receiver cheap that I was able to eventually sell to a friend and he's still using it.  I ended up trading the 840A in on the Pathos once its price dropped even more with my net cash investment being the first price that I saw it at.

The second round of disappointment was scratching another itch and purchasing a Krell S-300i.  It also had a home theater bypass, but once I rolled some tubes in the Pathos there was simply no comparison, so I ended up selling it as well.

Ironically, the Pathos Classic One, Cambridge Audio 840A, and Krell S-300i were all options when I purchased my Integra 50.1 receiver that I still have.  I almost purchased the 840A then and considered the Krell and Pathos to be out of reach.  Now I've had them all and still have the two that I enjoy most.

Buying a McIntosh MA252.

Going back aways here,… the Terk Pi amplified FM antenna. I got better reception with manufacturer included “T” wires tacked on the wall.

B&W Matrix 803, Classe CA-200, Clearaudio Delta -S, what really hurts is that i bought them brand new. Fortunately sold them quick with min loss.