Your JBL 4350's are classic, the synergy must be something else. I have noticed a pair for sale on CAM, (Canuck Audio Mart). How long have you had them? I think the year first year manufactured was 1979. Also results of direct outlet connection was unrevealing with the exception of reconnecting to P10, a greater silence between tracks and overall detail in music was pronounced when reconnecting to P10, (Music Mercury Living Presence Vol. 2 CD 5 Dvorak Symphony No.# 7 in D Minor and Tidal Streaming 24bit 96khz Jazz At The Pawnshop 30th Anniversary Tracks 1-4 Limehouse Blues)

Much appreciated. Unfortunately, no JBL behind the Moon. The table was a rebuild that I did with a friend that is now starting out in our hobby. Table is 3/4 inch Black Walnut, plinth and sides. He did the measuring and cuts and I did the finishing, took about 3 weeks on and off. Will post some photos of the rebuild. Going to try the direct Amplifier connection to outlets today after listening for a couple of hours and listen for any noticeable differences. 

Here is link to current setup:

https://systems.audiogon.com/systems/5370

Regards,

Paul