Calvinj,
Do you know which Amperex 7308's you used? I know there is a white label, green label, and orange label, and also one's made in Holland and the USA. Each has a different sound, with the 1960's white label getting the best reviews for soundstage and body and detail. Not sure if you ordered them from Upscale or somewhere else. I did call Dan at EAR USA and he uses different tubes in his player - one Amperex and one Mullard (his preference for his tastes). Just an FYI if you wanted to experiment with the sound of your EAR - you don't have to use the same tubes but can mix and match. Seems like having an assortment on hand would be best. Money of course can impact this.