lagexe Posted February 10, 2012 Report Share Posted February 10, 2012 google is being less than helpful: http://www.google.com/#hl=en&sa=X&ei=1Hk0T-iUMc2Utwfl4_WnAg&ved=0CBkQvwUoAQ&q=how+to+figure+ohm+rise&spell=1&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=f2900e4a30b61916&biw=1024&bih=650 So now, I'll ask here. What is the formula, or is there one? Link to comment Share on other sites More sharing options...
armykyle1 Posted February 10, 2012 Report Share Posted February 10, 2012 there's no way to estimate rise, you have to use above to get a real number. No two setups are alike. Port eff is king TEAM XS POWERTEAM HEAVY HERTZMy build- http://www.stevemeadedesigns.com/board/topic/194454-e46-bmw-build-pos/#entry2914134youtube- http://www.youtube.com/user/armykyle1big build starting Link to comment Share on other sites More sharing options...
Nine8SST Posted February 10, 2012 Report Share Posted February 10, 2012 And even more importantly....what can you do about rise? 1998 SS/T Ram Build Log - Kenwood KVT-514 and KNA-G510 Navigation - 2 DC Level 3 12" - Components??? - Sundown ??? - Sundown??? - Knu Konceptz - Second Skin Dampy Pro - XS D6500 Link to comment Share on other sites More sharing options...
lagexe Posted February 10, 2012 Author Report Share Posted February 10, 2012 Gotta measure a few things. Get a clamp on AC Amperage meter, and a Digital Voltage meter. Play a tone at your desired frequency and measure AC current out of the amp. At the same time measure AC voltage out of the amp. Use a true RMS meter with peak hold. Multiplying the 2 figures will give you power. Dividing voltage by current will tell you impedance. R=E/I R is resistance, E is voltage, I is current. Its Ohm's law I knew a little of this, I used to tinker around with breadboards. My more specific question is this: If I have 2, 4, 8 DVC subs, and I wire them to a desired ohm, How would I get the ohm value (with ohm rise). I understand that your method will tell me the current ohm value with ohm-rise, but is there a more generalized way? Will 2 sub @ D1 wire to =1ohm, or 1.2ohm, or is there no general way to tell? It was answered already, Thanks guys! Link to comment Share on other sites More sharing options...
Decaf Posted February 10, 2012 Report Share Posted February 10, 2012 ACV/ACA=rise ACV*ACA=wattage Link to comment Share on other sites More sharing options...
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