Hi all, dbx1252 and THAT 2150 are the same IC (just like the 2151, this with a little less distortion). THAT 2180 will work too, you just need to leave the distortion trimming pin disconected (see THAT 2180 series notes). A source for dbx schematics: http://members.tripod.com/~coreyeng/dbx1.htm -- abraços, Edu Silva ES2 Audio Salvador-BA