KAB RF-1 subsonic filter

Thank you for doing the necessary research, imhififan. I don’t doubt that you’re correct. What you write makes perfect sense in the case where one owns a separate phono and linestage, especially since it comes from KAB. I hope the OP reads your comment.

It should go between your preamplifier or linestage and the amplifier(s).  I took a quick look at a photo on-line.  Looks like you have a pair of female RCA inputs at one end and another pair of RCA jacks for output, at the other end.  Unfortunately, you will need a second pair of ICs to use on on side or the other of the RF-1, as opposed to the single pair needed to connect a preamp to an amp.  Got it?  I would have thought these very simple instructions would have come with the RF-1 from KAB.