i know that there is the D1 and the D2 option, but then in the description it says its actually .75 a coil for the D1 & 1.5 a coil for the D2. But then i also keep hearing about these impedance spikes when it reaches a certain resistance. So basically what i want is the exact load for just one 15" BTL D1 & D2 wired series and parallel. so im looking for a total of 4 numbers. thanks -wes

there is no such thing as exact load since music is dynamic...

the reason they list it as .75 is when you place it into an enclosure coupled with wire resistance the impedance tends to rise.. so that .75 will rise to 1ohm...

Don't mix up the DCR (Direct current resistance of the drivers voice coil at rest) and Nominal Impedance (approximate designed impedance under certain conditions)...

So just go off the coil config

Dual 1ohm can give you 1/2ohm or 2ohm load

Dual 2ohm can give you a 1ohm or 4ohm load

there is no such thing as exact load since music is dynamic...

the reason they list it as .75 is when you place it into an enclosure coupled with wire resistance the impedance tends to rise.. so that .75 will rise to 1ohm...

Don't mix up the DCR (Direct current resistance of the drivers voice coil at rest) and Nominal Impedance (approximate designed impedance under certain conditions)...

So just go off the coil config

Dual 1ohm can give you 1/2ohm or 2ohm load

Dual 2ohm can give you a 1ohm or 4ohm load

thanks