Wait a sec, on second thought after reading what I just wrote I think the EQ was designed for connecting to mixer inserts ... on the insert cable, the shield is only connected to the mixer - the in/out leg is unbalanced. I don't need to use the Ebtech!!!! eureka!
Correct, you don't need the Ebtech if lifting a shield eliminates a noise problem with your Wharfdale.
That said, I bought my first Ebtechs to be able to use Rane DDLs on inserts, they would hum or buzz in most uses regardless of pin 1 termination, transformer isolation was the only solution.