I just scored a pair of Technics SB-6000a, and was wondering if there was a protocol for refurbishing older speakers. They are a bit rough cosmetically but appear to work. The woofers seem to do their thing well, just a dented dust cap, I will try to repair them with a pin, and patience. The surrounds appear rubber like.
The attenuator sounds nice and clean, no noise when adjusting them. The panel itself needs a good clean, I was thinking of some wd40 on a rag? It is painted metal, so I am sure you can imagine what kind of bits of corrosion and surface grime has accumulated.
I was thinking it may be a good idea to disassemble the speakers, replace anything that needs to be replaced, and just give a good cleaning of them. I would really like to get them working well, and nice enough to either sell or keep, depending on how they sound. Will replacing the caps make the treble more pronounced? I know many people mention this mod, and I believe this may be a situation where a cap replacement may be needed, as the highs are a bit subdued compared to the bass. As well, I was curious if the fuses would have some effect on the highs, as they are connected to the tweeters. I will try to post pics tomorrow. Thanks