Totalnoob Posted August 25, 2015 Report Share Posted August 25, 2015 Hello everyone when you are wiring 3 subs in parallel it half's the ohm load each time so I am wondering if I bought 3 d4 subs if it would be .5 ohms? because 2 subs in parallel make it 1 ohm so adding another sub in parallel would make it .5? Does this make sense? I went to Rockford wiring wizzard and they are saying it will be a 2.67ohm load but how? Link to comment Share on other sites More sharing options...
reedal Posted August 25, 2015 Report Share Posted August 25, 2015 Hello everyone when you are wiring 3 subs in parallel it half's the ohm load each time so I am wondering if I bought 3 d4 subs if it would be .5 ohms? because 2 subs in parallel make it 1 ohm so adding another sub in parallel would make it .5? Does this make sense? I went to Rockford wiring wizzard and they are saying it will be a 2.67ohm load but how? Because that's not how resistance works. Resistance in series adds together. Resistance in parallel for your three dual 4ohm subs is as follows: Knowing that one dual 4ohm sub wired in parallel is 2ohm, Rtotal = 1 / (1/2 + 1/2 + 1/2) Giving you .6666666667 ohms for final impedance. Parallel resistance is just finding the reciprocal of each, adding it up, and then finding the reciprocal of the sum. SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
Totalnoob Posted August 25, 2015 Author Report Share Posted August 25, 2015 OK so if I understand this right lets say I get 4 subs that are d4 the math would be 1/((1/2)+(1/2)+(1/2)+(1/2)) which would come out to be .5 ohms? Or 3 subs that are d2 in parallel the math would be 1/(1+1+1) which would come out to be .33 ohms? Link to comment Share on other sites More sharing options...
REH Posted August 25, 2015 Report Share Posted August 25, 2015 OK so if I understand this right lets say I get 4 subs that are d4 the math would be 1/((1/2)+(1/2)+(1/2)+(1/2)) which would come out to be .5 ohms? Or 3 subs that are d2 in parallel the math would be 1/(1+1+1) which would come out to be .33 ohms? Yes Link to comment Share on other sites More sharing options...
reedal Posted August 26, 2015 Report Share Posted August 26, 2015 You got it dude. SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
rockFord_Expedition Posted August 26, 2015 Report Share Posted August 26, 2015 http://www.the12volt.com/caraudio/woofer_configurations.asp?Q=3&I=42 Old School/New School RF Build March 2015 SOTM Winner How to crimp large wire Link to comment Share on other sites More sharing options...
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