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Hello, I’ve been working on an old pair of Realistic Optimus 1’s and I just replaced the crossover capacitors. The high end has definitely improved after the replacement, but the low end has now disappeared in the mix. I’m not sure what could have caused the issue. The woofers are still working fine as far as I can tell. It’s just that the treble drowns out any bass response. Maybe the fiberglass insulation was replaced the wrong way? I cant think of a way anything got miswired as I only replaced one capacitor in each. Is there anything I can do to fix this?

Hello, I’ve been working on an old pair of Realistic Optimus 1’s and I just replaced the crossover capacitors. The high end has definitely improved after the replacement, but the low end has now disappeared in the mix. I’m not sure what could have caused the issue. The woofers are still working fine as far as I can tell. It’s just that the treble drowns out any bass response. Maybe the fiberglass insulation was replaced the wrong way? I cant think of a way anything got miswired as I only replaced one capacitor in each. Is there anything I can do to fix this?

I really need the schematics for the Realistic STA-780 and the only place they can be found is hifiengine, which does not allow me to register. Is there anyone with an existing who can help me out? Thank you so much!

Manual is here: https://www.hifiengine.com/manual_library/realistic/sta-780.shtml