my Zapco amp is stated as Tri-mode capable.. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gifOriginally posted by n2audio It's one of those BS features a lot of cheap amps will mention when they don't have anything else worth talking about. Any bridgable amp can do it.