Ok guys, quick update. I just got back in from the garage. Now correct me if im wrong, but when you are setting input voltage, you turn everything to flat/0 right? I have hpf/lpf on headunit flat with volume at 25 (0-35 max), all my amplifier settings at flat/0, bass knob plugged into amp and turned all the way up. I have a 40hz tone playing, with speaker wire disconnected from amplifier and the DMM, set to v/ac, probes in the terminals... I did the research on my head unit, and it says the CDA-9830 has triple 4v preouts.
I flipped the switch on the amplifier to "2v-8v", turning my gain up (aiming for 50v). When on the "2v-8v" setting, Gain@Min=4.04v/ac Gain@Max= 15.7 v/ac, When on the .1v-2v setting, Gain@Min=17.68 v/ac, Gain@Max=45.3 v/ac....
If i disconnect the bass knob from the amplifier= 2v-8v Gain@Min= 4.51 v/ac Gain@Max= 16.92 v/ac. .1v-2v Gain@Min= 19.73 v/ac Gain@Max= 50.4 v/ac
Am i doing something wrong here guys? Everything is supposed to be set flat right? Or do i need to open up the LPF to accept the tone?