If your amp is rated at x
watt@4ohms bridged and isnt 2ohm stable bridged, without potentially damaging the amp, then you can either...
run the coils in series, raising ohm to 8
get a 2ohm DVC and run it in series, giving you 4 ohms
get another 4ohm dvc, run the coils in series and wire the woofers in parallel, giving you 4ohms.
get an amp that is 2 ohm stable bridged.
Bridging the amp doesnt drop the ohms..Stereo doesnt raise the ohms.
Check out this woofer wizard...http://www.rockfordfosgate.com/rftech/wiringwizard.asp
(Message edited by wuneyewilly on September 03, 2004)