bird333 Posted September 27, 2013 Report Share Posted September 27, 2013 I got total resistance is 12 ohm so current is 1A. A * R=V so 8 ohm resistor has a 8v drop and the 4 ohm has a 4v drop. W=A*V so 8 ohm resistor has 8w of power and 4 ohm resistor has 4w of power. Does this sound right? Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted September 27, 2013 Report Share Posted September 27, 2013 I got total resistance is 12 ohm so current is 1A. A * R=V so 8 ohm resistor has a 8v drop and the 4 ohm has a 4v drop. W=A*V so 8 ohm resistor has 8w of power and 4 ohm resistor has 4w of power. Does this sound right? Homework answer: Total current = 12w Power in 8 ohm load = 8w " " 4 ohm load = 4w Is this right? I think we said the same thing (pretty much) so I think we are right. He will tell us if it's not. (I think) Quote Kickin' Cruiser Seller Feedback Stage 3 Dash, Door Panels,4th Order wall 4 - 15'son a DC 5.0K 2 DC 5.0K'sSolo X 15 (v.2) Sub Build Link to comment Share on other sites More sharing options...
Smoove Posted September 28, 2013 Report Share Posted September 28, 2013 I suck at math, so I didnt do the home work. I am following these vids and thread until the light bulb in my head goes on. I do like how he is making this practical. Quote 2 Team Fi 15's v1 2 DD M5's 970amps of Alt 6th order blowthroughThe truck Blowthrough build : http://www.stevemeadedesigns.com/board/topic/155555-smooves-1996-chevy-ext-cab-c1500-slow-build/The 350z build : http://www.stevemeadedesigns.com/board/topic/170694-smooves-2003-nissan-350z/ My FB page https://www.facebook.com/pages/Smooves-Car-Audio-and-performance/719746144805343 Team Fi Audio http://www.ficaraudio.com/ Link to comment Share on other sites More sharing options...
TaylorFade Posted September 29, 2013 Report Share Posted September 29, 2013 Holy hell. 16 pages of beating a dead horse to come up with.... zero new information. One thing I hadn't considered that Tony touched on (and that is annoying me now) is the markup. Yeah... aluminum is cheaper. And it very welll should be; becuase copper is trading ~ $3.25/lb right now while aluminum is more like $0.80/lb. That makes copper 4x as valuable yet CCA is only ~ 1/2 the price. Those bastards!!! CCA should be like, 50 cents a foot, damnit. In my world... I use what's close or what's cheap. And that's usually welding cable. It's f'n wire. I could not give two shits. But then again... I don't try to pass 500A through a single 20ft run of 1/0. I applaud the educational vids. They're sorely needed for some, redundant for some but uniteresting to most. Or is it disinteresting? Wake me when you get to the 600 level courses. 1 Quote Link to comment Share on other sites More sharing options...
Jessica Posted September 29, 2013 Report Share Posted September 29, 2013 As far as the markup think about the process to coat aluminum with copper. That might play a part in it. Quote Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Karkov Posted October 4, 2013 Report Share Posted October 4, 2013 As far as homework goes i was gonna try and do it but when i watch the video he explains it in a way I feel i understand it as the video is going but then when the video ends and I have to think by myself i just sit here scratching my head. Quote 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
Nikitaaa Posted October 4, 2013 Report Share Posted October 4, 2013 Holy hell. 16 pages of beating a dead horse to come up with.... zero new information. One thing I hadn't considered that Tony touched on (and that is annoying me now) is the markup. Yeah... aluminum is cheaper. And it very welll should be; becuase copper is trading ~ $3.25/lb right now while aluminum is more like $0.80/lb. That makes copper 4x as valuable yet CCA is only ~ 1/2 the price. Those bastards!!! CCA should be like, 50 cents a foot, damnit. In my world... I use what's close or what's cheap. And that's usually welding cable. It's f'n wire. I could not give two shits. But then again... I don't try to pass 500A through a single 20ft run of 1/0. I applaud the educational vids. They're sorely needed for some, redundant for some but uniteresting to most. Or is it disinteresting? Wake me when you get to the 600 level courses. How many runs do you use for said amperage? Out of curiosity Quote 2007 M/T Honda Civic Coupe EX (4) Sundown Audio X-8's (2) Ampere Audio 3800.1's (3) Stinger SPV-44 Batteries (1) Mechman 240 3:1 Ratio 4th order sealed from the trunkTEAM NWSPLBest termlab scores to date in Honda trunk:151.7db legal (official) IASCA trunk 3 classBest termlab scores to date in my walled Subie:152.9db legal (unofficial) IASCA advanced 2 class155db outlaw Link to comment Share on other sites More sharing options...
Wicks Posted October 4, 2013 Report Share Posted October 4, 2013 As far as homework goes i was gonna try and do it but when i watch the video he explains it in a way I feel i understand it as the video is going but then when the video ends and I have to think by myself i just sit here scratching my head. Just remember your basic formulas: Ohms Law: V=IR Power = VI = I^2R Those formulas can be rearranged depending on what number you're given and what you need to find. Plug in the known numbers and solve for the unknown(s). 2 Quote This post sent with 100% recycled electrons. 2004 BMW M3Mechman 280A 2 - XS Power XP30001 - XS Power D375 500F of Maxwell SuperCaps (soon to be 1000F) iPadMini2Dash mounted O-scopeAudison bitOne (Remote DRC MP) Highs Amp - PPI Art A404 Hertz HSK130 (HSK165 waiting...) DC Audio DC9.0K 2- DC Audio XL12m2LEGAL - 147.3dB @ 41Hz OUTLAW - 150.2dB @ 45Hz OUTLAW - 145.7dB @ 30Hz JUNE 2014 SOTM WINNER 2014 COLORADO PEOPLE'S CHOICE WINNER SOTM BUILD:http://www.stevemeadedesigns.com/board/topic/141656-wicks-e46-m3-build-bass-turbo-button-and-a-big-new-addition/page-68#entry2802026 Link to comment Share on other sites More sharing options...
TonyD'Amore Posted October 7, 2013 Author Report Share Posted October 7, 2013 Video 3 posted! 8 Quote Link to comment Share on other sites More sharing options...
Bradprobert Posted October 7, 2013 Report Share Posted October 7, 2013 A) 11.8v 11.4v C) 2280w D) 1596w Quote [sharedmedia=garage:vehicles:2223] 4th-order under rear seat build log: http://www.stevemeadedesigns.com/board/topic/165708-4th-order-under-rear-seat-chevy-extended-cab/#entry2410477 SD, thank for the input. I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . Link to comment Share on other sites More sharing options...
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