no.....read:
http://www.digizoid.com/tech/index.html
EDIT: Sorry, it's a bit hard to explain. It's best just to read the website for more information as it's not really mentioned anywhere else. It's a proprietary technology and it does wonders. The ZO2 and my AS-2's make my head think it's at a concert. I use it every once in a while to get that type of feel for short listening sessions. Otherwise i use it with little to no bass boost and it still adds an interesting effect to the sound. Very fun amp. It pretty much makes you feel the music more as it's more expansive and you may get the urge to start moving to the music with complete disregard for anyone looking on. It's always a good time when I use it.
EDIT 2: And Cindy and the rest of the gang there at digizoid are great. They love what they do and are happy to help respond and take care of customers. I always look forward to emailing them and even stay in touch when i have no other reason to email them just because they are good people.