Just as an update... The T1 was indeed a faulty unit. I have since returned it for an exchange, and the replacement works like a charm.  Thanks for the suggestions on a fix. It was great to have a few other things to try and troubleshoot. Cheers!

Hey all~   Hoping I can get some help getting my BRAND NEW T1 (6922EH tube) to work... Here's my setup: 2009 Macbook Pro 2.66 Core 2 OSX Mavericks 10.9 Build 13A603   I'm having an issue that when the volume is turned up on the computer, there is massive distortion coming from the T1 (via...