in my electronics workshop I have always had a stereo. Eight years ago I looked on the shelf and decided there was all the makings of an integrated preamp - DSP - Crossover and four power amplifiers.
That is the price of always making an extra board or two when I build a "thing" - you end up with a massive collection of bits.
I duly shoe-horned this lot into a case that is about 3" high. Tuned it up and didn't think a lot more.
Fast forward 8 years to two weeks ago, and there I was listening to the radio while wondering what to build next, and I thought the left tweeter sounded a bit low.
I swapped input to the amp L-R, and yep, it was. Odd - as the DSP treats L and R exactly the same, there is no balance control in there. So I swapped the speakers. Hmm, it wasn't the tweeter. It was inside the "box".
So I popped the lid, and found this...