I've done a search on this and haven't found a difinitive answer. Is the SVPcl preamp the same as the SVTVR or the SVTCL or neither? What about the SVP Pro? In the 70's ,when you said SVT nobody asked, "VR,CL,Pro,3,4,8"? So much useage of the word SVT clouds it's meaning , but thats another topic.