SnowDrifter Posted September 7, 2013 Report Posted September 7, 2013 Depends on the length of half the run of the circuit. This should get you in the ballpark Just FYI this chart is for 12v DC current. Not AC ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
shogen Posted September 7, 2013 Report Posted September 7, 2013 I think thats why he divided by 12 in his m Depends on the length of half the run of the circuit. This should get you in the ballpark Just FYI this chart is for 12v DC current. Not AC ath?? Pioneer Premier P880PRS ll Front Stage: US Acoustics 4060 - Random speakers currently ll Sub Stage: Crescendo BC3500D - 15" Xcon sealed @ 3.28 cubes ll Electrical: - Kinetik HC1800(front) NEW***DieHard P-2(rear) beaker- I know this sounds like a lot of anime bullshit, but it is true.
SnowDrifter Posted September 7, 2013 Report Posted September 7, 2013 I think thats why he divided by 12 in his math?? What do you mean? ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
RooTxBeeR Posted September 7, 2013 Report Posted September 7, 2013 I just do 8awg, I got a spool of dat shit so it aint nuthin lmao On 11/20/2012 at 8:54 PM, AMI CUSTOMS said: Turned mine up today at a light, guy next to me his steering wheel started moving and he looked over at me like I was a magician lol. On 5/9/2012 at 8:45 PM, skittlesRgood said: fuck the plating. look at what the main metal used is. you could buy unicorn blood plated terminals but if its just covering up dog shit, whats the point On 4/10/2013 at 12:26 PM, mrd6 said: I'll admit, half way through sanding that fiberglass in the rain and cold while I was all itchy I was definitely starting to question why i was doing this haha Soon To Be '04 Ford Escape US Alternator 280A Hairpin D4800 Under the Hood (6) XP3000's in Rear 1/0 SHCA & XS Power 4 runs to back TORK2 kit from Tony @ CE Auto Supply Pioneer DEH-80PRS DD AW6.5 (2) per door *Tweeter Unkown* DD SS4a & C3d (2) SCV4000 @ .5Ohm (2) 15" Sundown Zv5
Krakin Posted September 7, 2013 Report Posted September 7, 2013 I think thats why he divided by 12 in his math?? What do you mean? Idk what he means. That 12 was just to go from inches to feet Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener.
shogen Posted September 7, 2013 Report Posted September 7, 2013 this... not sure what his math was up to.... lol.... I think thats why he divided by 12 in his math?? What do you mean? The chart above tells you what gauge wire to use. You get how many amps are being given to the driver. Then measure how long the run from the positive to negative speaker terminal is. Then half that number. For example take my design, the total wire run will be 80". 80/2=40 40/12= 3.33' My amplifier is fused for 90 amps so I know it shouldn't be putting out much more than that, but to be on the safe side lets wire for 100 amps. 100 is equal to 1200 watts. So we need to find 100amps and 3.33 feet on the chart. Found it and I need 8 AWG wire for that long of a run. Pioneer Premier P880PRS ll Front Stage: US Acoustics 4060 - Random speakers currently ll Sub Stage: Crescendo BC3500D - 15" Xcon sealed @ 3.28 cubes ll Electrical: - Kinetik HC1800(front) NEW***DieHard P-2(rear) beaker- I know this sounds like a lot of anime bullshit, but it is true.
bkolfo4 Posted September 7, 2013 Report Posted September 7, 2013 He asked about speaker wire. Amp is fused at 90? That really is not relevant to the speaker wire. The input voltage is set at 12 volts, the output voltage can be much higher, meaning the output current can be much lower than the input current. If you have 1000 watts, is it at 1 ohm, 2 ohms, 4 ohms? Dual voice coil? Going to run wire to each voice coil, or jumper between coils? How far is the amp from the sub? Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz.
SnowDrifter Posted September 7, 2013 Report Posted September 7, 2013 Ahhhh. Here's the thing: He calculated his wire needs based on the power input for the amplifier, not the power output. No need for 8ga wire for a 1200 watt amp. Especially for 3 and a half feet. Ohms law says this: Power = V^2/R So V=sqrt(P*R) V = sqrt(1000*1) V=32 AND current - I=V/R Since R is 1, I is also 32. So that means 32 amps on the output, assuming no rise and no clipping. That chart says to use 14ga. Wikipedia states that the ampacity for a 12ga wire with 90 degree insulation is 30 amps. I'm rounding down from 31.6 in my recommendation to use 12ga. You'll want thicker if you are using CCA wire. ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
ham4864 Posted September 7, 2013 Author Report Posted September 7, 2013 amp is maybe 3' from my box if that,i will be running it at 1ohm,its a dual 2 ohm single woofer,jumped between coils. 2009 bmw 5 series Head Unit Stock Amplifier-JL Audio JX 360/4 Processor- Audiocontrol LC6
jmfrb1 Posted September 7, 2013 Report Posted September 7, 2013 Just fill this out n play around eith speaker wire size. problem solved. http://www.rockfordfosgate.com/Support/rftech.aspx
Recommended Posts
Archived
This topic is now archived and is closed to further replies.