Vintage setup, so anything can happen. Added a sub a few months ago.
Sounded great after getting it all sorted. Thought I'd swap out the speaker cables from the amp to the sub. 4ft of 10g wired in, over the zip cord that was thrown in for setup.
It sounded ok, but was surprised the zip cord was just as good, if not better....
Then started to loose bass, played around with the sub, checked connections were tight, sub was on. Also felt like my speaker balance was off, it just sounded off. Loos of dynamics, center image was off, the system was just "scattered". This plagued me for several weeks. Great, my just restored amp is going out..
Scoured the web for a replacement, found a nice pre & power amp 4h away. Called the guy, we chatted agreed to meet half way. Piled the dog in the car for a road trip. Units as described, power amp looks better than mine. We drive off
Get home, test the new stuff out, it sounds much better, but not as good as after my refreshing my pre & power amp. Hook my pre-amp into the new power amp. Oh yeah, that sounds good! It must be my power amp going out. Put my old power amp back, switch on. OMG, it sounds AMAZING, what?
Months ago, when I swap out the zip cord, swapped the left ch, so it has been out of phase. Cost me a thousand bucks, and lots of sleepless nights of worrying. Felt like a dumb a$$. Now I got spares....