quick wiring question...
06-16-2004, 06:55 PM
#1
i built a box for a dvc sub... when wiring from the terminals to the sub, should i run a separate wire from the terminals (on the box) to each voice coil? or is it okay to run the wire from the terminals to one voice coil then run a short piece from that one to the other voice coil?
will that 8-12 inches or wire make a difference?
thanks...
will that 8-12 inches or wire make a difference?
thanks...
06-16-2004, 10:00 PM
#2
06-19-2004, 06:49 PM
#7
0 Watt CAFz'r
Join Date: May 2004
Posts: 39
Dazz, the lenght of wire will not matter here.
example
An old electronic teacher said it this way: If you have two tubes of the same diameter but different lengths, both filled with tennis *****...
If you were to add a tennis ball to each tube, one would pop out the other side no matter the lengh.
example
An old electronic teacher said it this way: If you have two tubes of the same diameter but different lengths, both filled with tennis *****...
If you were to add a tennis ball to each tube, one would pop out the other side no matter the lengh.
06-19-2004, 09:05 PM
#8
50 Watt CAFz'r
Join Date: May 2004
Posts: 189
Dazz look at it mathematically
V=I*R(Ohms Law) so rearrange it to I=V/R. Since you know the nominal resistance of your subs just take a dmm to your terminals on the amp and you will get your voltage. Then do the math and figure out your amperage. This will let you know the current going through the wire
Example I will take a JL 1000/1 with a nominal value of 3 ohms(from a SVC JL sub). I know by the manual on the sub that they want 54.7V as an output voltage. So 54.7/3 = 18.23 amps. Now If you look at a wire guide it shows 14 ft as the most without any significant loss on a 12 guage wire. So your 8-12 inches aint going to be a damn bit of difference.
You dont have to go through the dmm exercise as you can be sure that 8-12 inches wont do a damn thing that could be audible or noticable
[ June 19, 2004, 10:07 PM: Message edited by: MDXMan ]
V=I*R(Ohms Law) so rearrange it to I=V/R. Since you know the nominal resistance of your subs just take a dmm to your terminals on the amp and you will get your voltage. Then do the math and figure out your amperage. This will let you know the current going through the wire
Example I will take a JL 1000/1 with a nominal value of 3 ohms(from a SVC JL sub). I know by the manual on the sub that they want 54.7V as an output voltage. So 54.7/3 = 18.23 amps. Now If you look at a wire guide it shows 14 ft as the most without any significant loss on a 12 guage wire. So your 8-12 inches aint going to be a damn bit of difference.
You dont have to go through the dmm exercise as you can be sure that 8-12 inches wont do a damn thing that could be audible or noticable
[ June 19, 2004, 10:07 PM: Message edited by: MDXMan ]
06-20-2004, 09:21 AM
#9
anyone who says there's a noticable loss in 12 guage wire after 14 feet, with 18 amps running through it has absolutely no clue what they're talking about. to have a noticable loss in current carrying capacity, you'd need a length of well over 100 feet.
Then again, I'm sure the people who make these "guides" also sell wire, so it's in their best interest to tell you that you're going to lose power if you're not running 4 guage for a 15 foot 18 amp run.
Then again, I'm sure the people who make these "guides" also sell wire, so it's in their best interest to tell you that you're going to lose power if you're not running 4 guage for a 15 foot 18 amp run.
06-20-2004, 01:50 PM
#10
0 Watt CAFz'r
Join Date: May 2004
Posts: 39
oh boy 
, lets not forget the cube loss by adding 14 feet of coiled up wire in a given sub box...lol I guess this would vary depending upon the diameter of the insulation used between each manufacturer
[ June 20, 2004, 02:57 PM: Message edited by: Buddy ]
, lets not forget the cube loss by adding 14 feet of coiled up wire in a given sub box...lol I guess this would vary depending upon the diameter of the insulation used between each manufacturer[ June 20, 2004, 02:57 PM: Message edited by: Buddy ]
