What Gear Has Disappointed You?

NAD 7 channel Surround Sound Receiver. I forget the model ( sort of intentionally) but it was the top of the line & pretty expensive. Performed well, sounded quite good for both stereo music listening & for movie watching & had plenty of power. 

After about 4 years of only moderate use, the right channel started to get occasionally noisy for a second or two & then be fine for weeks. Finally, the right channel died. Goodwins High End in Waltham MA where I bought it seemed to have very little interest in helping me, took way too long to get back to me, & quoted about $1000 to get it repaired w/ no guarantee of success!
 

The unit was supposed to be easily upgradable w/ plug in modules as technology changed which also turned out not to be true. Both the equipment & the store left a bad taste in my mouth. I bought a nice Anthem receiver to replace it & been happy ever since. 

B&W Matrix 802 series 3. I couldn't believe how thin these sounded compared to Infinity kappa 8's. I put them for sale the same day and never had not one call. So I kept them replaced the xovers,  added a sub woofer swarm, they still sound a little thin at times but I'm keeping them for now.  I was told there a collectors speaker whatever that means. 

Aurender A10 lack luster sound for excessive money. its built well but has a boring presentation.

Roon Nucleus other than room software itself what a disappointing sound from a well review streamer, not surprising when you open one up and see an empty box. 

Spendor D9.2 speakers, a very thin sounding presentation, lack of tone, and tipped up top end. yes, they are hyper detailed and have good speed but that's about all. 

A lot of the very large and high end systems set up in small hotel rooms at audio shows disappoint me. Could do just as well in a room like that for a fraction of the cost in many cases.