helotax1

^^^ What he said. 2 fuses on the wire between the two batts. Both are a source of current and a short between them will short them both. You need to be able to cut the current from both sources.

To add to what squeak said, the multiple runs of wire within each winding are strictly for current handling. And the multiple output taps are for different voltages. Its been a long time since I worked with making a DC/DC power supply, but the basic idea is that you use a series of transistors (or MOSFETs) to pulse the DC input voltage. The pulsed DC is run into an inductor and energy is stored in the mag field of the inductor. In between pulses the inductor basically reverses the voltage giving AC. From there the AC goes into the transformer for the voltage stepup and then into a pair of rectifiers. The resulting output is DC both + and - for whatever the desired rail voltage is. The caps in the input serve two purposes. They stiffen the DC input of the amp and they filter out any ripple in the DC input from the car's electrical system.

sounds to me like you recreated the Aperiodic enclosures with the seat as the membrane.

Any words as to price when these become available?