Macrojack has it right. There is no bottom port and Definitions do not benefit in any way with good spikes, bad spikes, and no spikes. Ask the Zu owners and they will tell you the same thing. I've tried their hardwood floor spikes, their carpet spikes, Adona brass spikes, and none. I settled on a pair of 2" thick maple platforms; not for isolation performance but for two other reasons. First, they raised the tweeter to a height that pleases my listening better and second it gives me the ability to toe in and out without scratching my floors.
Call or private email to discuss further. This will be my only post concerning this thread.
Disclaimer: Zu seller
Call or private email to discuss further. This will be my only post concerning this thread.
Disclaimer: Zu seller