For decades Bill Johnson and then his proteges used a VPI table in there lab. Not sure if it is still there but the SP-14 was designed with a TNT in the lab.
I do all my testing now using exact volume matched high rez digital recordings and then playing them for my buddies at the NJ Audio Society and others to see which they like better or if they could even determine a difference. The SP-14 has done very, very well in these tests.
Another item that has done very well is the Ortofon Cadenza Bronze. Everyone seems to love it, then they find out what they are listening to and they frown. What, not an Atlas or Colibri, or Goldfinger!!! It is an amazingly musical cartridge and yet highly revealing and detailed. Used with the VAS step up transformer it can go straight into the SP-14 and the results are stunning.
HW