Smart choice for Uranium 238; it is non-fissionable. Stay away from U-235, that's the fissionable isotope...unless, of course, you REALLY want to hear the cannons on the 1812 Overture, but this would be a one time only listening experience!
copper, silver, uranium 238?
Need some sound advice about speaker cable. Have Jadis power amps, and Pre-amp. For now have AudioQuest Volcano (non-dbs) Cost to me is a big factor like so many other people out there. I will also be changing my speakers from the Sonus Faber "Auditors" to a Wilson watt/puppy series. Thanks Craig