If you're interested in a owner or service repair manual they seem to available HERE
This is from some DBX Lit I have about DBX3
"For full flexibility Pre and Post switching is available to you. The Pre position allows you to expand a signal prior to the tape deck for recording purposes, while the Post position allows expansion after the tape deck to expand a normal tape or signal source if so desired"
HTH Dave
This is from some DBX Lit I have about DBX3
"For full flexibility Pre and Post switching is available to you. The Pre position allows you to expand a signal prior to the tape deck for recording purposes, while the Post position allows expansion after the tape deck to expand a normal tape or signal source if so desired"
HTH Dave