BIGSKYGUY ... knows his stuff
But... I would like to add some food for thought.
New here.. not to audio.
UL 1449 Rating A-1-1 ... IS the standard in surge protection products.
All of the patents are held by Dr. Rudy Harford. (4,870,534 & 4,870,528 FYI).
The good Dr. owns Zero Surge which makes their own and Brick Wall and licenses Empower, Adco and SurgeX > which is the Audio Co, which has made a few technical advancements and if it is not "king of the mountain" in surge protection technology, someone correct me please. This is Series surge protection NOT MOV technology which will fail and leave you wondering why your gear is toasted. PLEASE CHECK THIS OUT AND UNDERSTAND WHAT YOU ARE SPENDING YOUR HARD EARNED MONEY ON. The www is full of info concerning surge protection.
Also: AC conditioning is an added benifit with this technology. There are several reviews concerning this issue. Check out some of the above websites
and save yourself the headaches involved with MOV technology and its design
short comings. Ask for ratings when you are buying surge protection and do not waste your money.
I have NO connection in ANY fashion with ANY of the above mentioned Co's.
I live on the Gulf Coast and am more than a bit concerned with the surge problems associated with LIGHTNING, and through ingorance have learned
the hard way, MOV technology is like compairing mechanical brakes to disc brakes.