Buyer to pay shipping. Used as center channel for less than a year, has been sitting waiting for new home! Sounds awesome, has all the power needed for any single speaker. I have only this one. Rated 8 only due to age. I do not have the trigger cable. Used with XLR and Nordost cable. I checked with WFS and they confirmed it is a MK II. serial number SX-1000-C-9C133. If you need a center channel amp, these do not come up single often, so get it now! Small chip on one side of case, see pictures for anything cosmetic. sold as is.