So I looked at Fi Car Audio and then Acendant Audio...

[quakecitystudio 0]

I looked at both company's products and was a little baffled as to why AA would want all of their subs to have a 1.85 ohm(3.7 since all of their subs are dvc) whereas FI's products are 2 ohm/vc respectfully unless FI's are the same but just secretly rounded. I used the calculator on http://www.the12volt.com but couldn't get the AA's to come out to an even ohm no matter how many woofers are added to the mix.

[NDMstang65 403]

They're not, it's DCR, not a nominal resistance....

1.85ohms is WELL within spec for a dual 2ohm coil, you just wire it as a standard dual 2ohm sub, a .75 or .85ohm coil is industry standard for a dual 1ohm coil...a few tenths of an ohm lower isn't going to hurt your amp by any means.

Thanks!

-Nick

[quakecitystudio 0]

Thanks for the help.

[BKOLFO4 29]

The DCR is the coil's resistance with a DC voltage/current applied. Your amps will not see this resistance except maybe in the condition of a full power burp for milliseconds before the coil is energized (begins to create a magnetid field).

The impedance is the "resistance" when A/C is applied. A speaker's voice coil being a coil causes the impedance to change with frequency. The nominal impedance is the average rating that will be seen while the speaker is playing. Add to that the impedance rise due to the change in the speaker's reaction once placed in an enclosure, and the impedance will be even higher. . .

Here are a couple of good articles:

http://www.bcae1.com/resvsimp.htm

http://www.teamrocs.com/technical/pages/re...e_impedance.htm