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KRK Rokit 6 Repair
A KRK Rokit 6 repair as it was totally dead other than producing a screaming type sound when powered up.
Some kind of black mysterious panel bond or sticky adhesive was used to not only secure some components at point of manufacture but it looked like it was spread over almost everything for some reason only known to KRK. Many capacitors were completely covered in this stuff which, over time, has formed a conductive carbonated type hard top layer of crust with an underlayer of oily wet liquid.
This has corroded links, component legs, shorted components with a high resistance conductive path. All the capacitors inside were of previously unknown ‘brands’. Every single electrolytic when tested on the ESR meter showed either extremely high ESR (like 20+ ohms) or they were reading open circuit/bad. All of them were way under their labeled values often by at least 50%.
The main PSU regulator ones had vented corrosive electrolyte.
All of this mess needed cleaning up and all these capacitors were replaced. The unit now works fine but the repair was not economical.
The connectors were all glued and shattered when trying to remove them, the wires were all corroded so needed stripping back and resoldering.
From what was inside, it would seem that these speakers may sound acceptable out of the box but over time the degradation in sound quality would be significant.
