| From | Message |
Hollis
Dodge Dakota
JOIN HERE
4/19/2007
22:56:13
|
 Subject: Sub Speaker Wire Damping?
IP: Logged
Message:
I have 2 Boston G2-10's running off a Premiere 600x1 RMS Class D amp at 2 ohms. I have them hooked up with about 1 1/2ft of Monster XP 16ga. speaker wire. They are in .5 cuft sealed enclosures. Do you think this wire is small enough to cause any damping? They sound great, but at high volumes they can't keep up with my mids and highs.
|
DSW
Dodge Dakota
JOIN HERE
4/20/2007
03:26:21
|  RE: Sub Speaker Wire Damping?
IP: Logged
Message:
Yes...
And what your experiencing is the effect of running too small of wire. I would run 12GA wire to each sub at a minimum. It's not going to hurt running too big of a wire, but too small will cause problems. Heck, I have 16 gauge wire going to my components and 10 gauge going to the sub.
|
Shoe
GenIII
4/20/2007
19:06:39
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
Bigger wire never hurts.
'97 RC V6, 5spd, soon to be V8, 5spd!
|
Jim
Dodge Dakota
JOIN HERE
4/27/2007
20:25:04
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
"o you think this wire is small enough to cause any damping?"
No.
16 gauge copper wire is roughly 0.005 ohms per foot. So no, it's not significant.
|
DSW
Dodge Dakota
JOIN HERE
4/28/2007
06:33:57
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
25 amps is a lot to be pulling through 16ga wire,,,, even if it's only a few feet.
I guess we could perform a little experiment to see if 0.005 ohm 16ga will make a difference when pulling a bunch of current across the wire. Connect a few feet of 16ga wire (heck that's only about 0.015 ohms) from your battery to the starter and then start the truck,,,
(hint: grab a fire extinguisher)
|
Shoe
GenIII
4/28/2007
17:35:08
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
That would be a lot of amps going to the wires and would cause it to get extremely hot if not melt the wire. I have seen people do that trying to ground an amp. With 16GA wire. I was like why? And when they said ow, that wire gets hot quick, I was like, yeah you dumba$$.
'97 RC V6, 5spd, soon to be V8, 5spd!
|
Jim
Dodge Dakota
JOIN HERE
4/28/2007
20:57:12
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
"I guess we could perform a little experiment to see if 0.005 ohm 16ga will make a difference when pulling a bunch of current across the wire. Connect a few feet of 16ga wire (heck that's only about 0.015 ohms) from your battery to the starter and then start the truck,,,"
You're seriously comparing a brief ~25A transient to a steady 300A draw by the starter? Come on, be realistic.
second, speakers are complex loads and you can't just take P=V^2/R like you can with resistive loads.
Third, a subwoofer is generally operating around its resonance, which is well over 2 ohms anyway.
|
Alec
Dodge Dakota
JOIN HERE
5/01/2007
21:14:45
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
Wire resistance definately has an effect, but it is not very noticeable in the short distance of a car (under 18 feet). Also, if you have quality copper wires, the resistance created from copper's resitivity will not be near as great as a cheaper wire kit. So, in other words, just buy copper and forget about it!
|
DSW
Dodge Dakota
JOIN HERE
5/01/2007
22:32:15
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
Go to: http://www.bcae1.com
Page through to find the "Speaker Wire Calculator"
For chits and giggles I input the the variables of
Power per channel = 300
Speaker wire length = 1.5
Speaker wire guage = 16
Load Impedance = 2
Hit the enter button to calculate and do you know what comment it brought up.........
"There's too much loss, too few cm/A and/or an error due to the values entered. Use a larger wire or a shorter length of wire."
Gee..... USE A LARGER WIRE!
|
Jim
Dodge Dakota
JOIN HERE
5/02/2007
16:28:32
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
""There's too much loss, too few cm/A and/or an error due to the values entered. Use a larger wire or a shorter length of wire."
Gee..... USE A LARGER WIRE!"
Did you also miss the comment which says:
"Decibel loss (less than 1 dB is inaudible): 0.05
So, they say that less than 1 dB loss is inaudible, calculate that the dB loss due to wire is 0.05 dB, then say there's too much loss? A bit contradictory, wouldn't you say?
Look, a voltage drop of 0.15 volts is irrelevant. Plus, their calculations are treating the speaker as a resistive 2 ohm load, which has nothing to do with the real world. A speaker is a complex reactive load being driven by an AC supply. The current waveform is rarely in phase with the voltage waveform, therefore you *cannot* simply use Ohm's law and figure the power output based on the voltage and speaker's resistance. it just doesn't work that way.
|
DSW
Dodge Dakota
JOIN HERE
5/02/2007
16:46:52
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
Sure I saw the 1 db thing, but thier calculator was still saying the wire was too thin.
Let's just agree that we disagree and call it at that...
I'll continue to run larger wire that WON'T experience problems.
You can run a miminal guage wire and hope none of the strands get broken or the amp doesn't exceed the capacity of the wire.
I still recommend running 12ga wire to the subs..........
and I'm sure you will still recommend running 16ga wire...
enough said
|
Hollis
Dodge Dakota
JOIN HERE
5/02/2007
18:43:48
| RE: Sub Speaker Wire Damping?
IP: Logged
Message:
I changed the wire to 12 ga. and installed spade connectors to the amp. I think I can a tell a difference...?
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
