whichever one is for "subwoofer" If there isnt one designated and you are not amping your speakers, just use either one (i prefer rear).

If your amplifier isn't getting a signal, make sure that your have your RCAs tightly connected as well as the speaker leads to and from the subwoofer itself. Make sure that your gains are not all the way down nor all the way up, start em out at the center and then lower them and raise them accordingly.


Some amplifiers (like mine) have switches on them that could potentially shut off the signal to the subwoofer. For example if you have a switch that allows you to select between 2v-4v and 5v-8v preamp voltages -- make sure to try both settings to make sure you're using the right one. Also make sure you do not have a master/slave switch if your amp is connectible to another one. Make sure its set to master.


Also make sure in your options to select that you're using an amp/subwoofer amp and then raise the subwoofer volume.