I tried using and customizing jumpers for my speaker configuration but ended up bypassing them altogether. I had to daisy chain external 4 ohm speakers with an 8 ohm amplifier. When adjusting the jumpers for the speaker settings, whether I connected them in parallel or in series, the speakers really lacked volume. I ended up connecting the wires in the volume cabinet and connecting the speakers in series to my amp. Wow, what a volume difference. I think that volume rocker also put a lot of strain on the amp as it got very hot with almost any speaker configuration. Once I removed the volume rocker from the game, My speakers rocked. I do not recommend it. In addition, the plastic screw holes inside break easily.
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