So I made a post in this thread Dropping the bass - love at 50Hz yesterday, and haven't got any answer yet, and probably won't since the thread and post will most likely, and in fact already have, be buried by other threads and posts, so turning to this this sub forum instead for my answer, which is where it really would belong anyway. My post was pretty much like this, and concerning the instructions and calculator found on this page: High Pass Filter Calculator : So I decided to make my own HPF box. Basically just a box holding the quite simple circuit for a passive HPF, consisting of only one capacitor and one resistance component connected to an input and an output jack plug. I've gone for a cut off frequency about 37Hz using a +/-1% tolerance 47nF capacitor and a +/-1% tolerance 90.9 KOhm resistance (90.9 KOhm is the actual value of the resistance displayed on the dealers page. Guess they measured them or something). Since, despite the fact that most people seem to agree on leaving the roll off at 50Hz, as far as I am informed the fundamental of the E string is about 41Hz, so I'd rather leave that untouched. Anyway, apparently I am dufus at reading even the simplest schematics, so while I understand how the two components are connected to each other, I am not quite sure how they are supposed to be connected to the input and output jack I am going to attach to the box to keep the myriad of components in this highly advanced circuit in. In other words which component of the circuit is supposed to be connected to the input and which to the output, and do I use the shield (ground) of the wire to connect them or the tip (hot lead) of the wire? Could someone please help me out with this perhaps?