Hey all, after checking the innards of my misbehaving Behringer BX600 (see "Behringer BX600" thread) it occurred to me that the Landmark probably uses the same amp IC as they are the same exact power so I took a look-see and so it does! Big difference in quality of the pc boards and such though. The Landmark 60 sure is a thing of beauty inside! Anyways I bought both so I could haul the BX600 to jams in nasty weather and the Landmark 60 when it gets better up here in the Northeast. I can also use the BX600 as a slave powered extention cab for twice the power, sounds pretty good that way. The Tech 21 slave costs almost as much as the Landmark 60! The BX600 is 1/3 the price.