Hi Eliotswede,
I, indeed, have the version with the sealed box. Regarding the silvercables, it depends mostly on the accompanying equipment what the result will be. Combination with, for instance, loudspeakercables that consist out of copper, is a very bad combination. Combine it with cables of silver and/or gold and the result will be amazing.
I,ve tried a lot of poweramplifiers on the Violons, including SET of 80 Watts - Double Kronzilla, etc, and found out that the Violons do love power very much, hence the JA200.
Regards,