Here is the problem. I have 15.6 volts at the alternator, 14.3 on the battery, 14 at the wire running from the battery isolator to the rear battery, but only 11 at the amps. What is the problem? Why such low voltage? With the system on and the multimeter on the amp pos and neg, I can see the voltage drop slowly but steadily. Is this a bad ground? The alt is 200 amps (185 with no load, more depending on the load applied). After about 10 minutes of some Manson or 3-6 the 4 channel begins to cut out. I imagine it is because the sub amps are drawing too much power for the battery to support the 4 channel. Why does my voltage and amperage drop so quickly? Do I need another battery(i doubt it)?
Also, Monday I'll be redoing my port from a single 4 inch round to a 60 sq inch slot and going from 22 Hz to 35 Hz. Anyone have any idea what kind of SPL difference I'll see at say 40 Hz?
