Looks good so far, jumpers still have me scratching my head. Translation doesn't help much. I assume the jumpers also set frequencies. Translations: 4-pin jumper (treble): top label: high sound (=treble) strong bottom left: weak; bottom right: mid 5 pin jumper (bass): top label right: strong low, top label left: low sound bottom left: full sound; bottom right: mid sound I assume "mid sound" / "low sound" refers to lower cutoff, but haven't tested that yet.
Thanks!