With a more critical ear and time to do so, the #tweeters on my 35+ year old #IAS #Ashurst studio loudspeakers are under investigation for low or no output.

The #domes are both perished-looking, I'm not sure whether to replace the whole drivers or attempt surface #reconditioning

I have to pre-boost the treble if I'm to use them like this. Headphones sound much crisper by comparison.

Resurfacing idea: https://www.stereonet.com/forums/topic/550213-decaying-or-dirty-tweeters/

#VintageHifi #repair #soundsystem

When #LithiumIon #batteries fall below 75% capacity, they are considered unfit to #power #EVs but #research suggests that proper #reconditioning could #extend their life by years.
The research team will specifically be looking at #developing #automated ways to #disassemble batteries for more #efficient #recycling & #safety #protocols for recycling, #transporting & #storing them.

https://environmentjournal.online/articles/nottingham-trent-university-embark-on-project-to-give-electric-vehicle-batteries-a-second-life/