The wall wart for the Xtension 10 has absolutely nothing to do with the quality of sonic reproduction. In fact, it keeps a noisy power supply AWAY FROM the tonearm wiring. That fact that it powers the equivalent of the Speed Box SE makes it a moot point: good, clean, steady power to the motor is what matters here. The wall wart is quite high quality, and a clever design which takes slide-in adapters for worldwide use. That and it apparently auto-senses or converts any worldwide voltage.
As for the plinth, I can assure you it's about as dead as it can get. It is filled with metal "sand" and is very substantial in mass. It's about as uncolored as I've ever heard a turntable get, at least in its price range.
