Length of Speaker Wire - AVS Forum
Forum Jump: 
Reply
 
Thread Tools
post #1 of 97 Old 02-15-2013, 05:36 AM - Thread Starter
Member
 
Jack Bauer Jr's Avatar
 
Join Date: Nov 2008
Posts: 16
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I am about to begin speaker installation for my first home theater...

Issue/Question: Does the length of each run of speaker wire need to be the same for the speakers they are going to? To put it another way, does the speaker wire length for the left-rear speaker need to be the same length as the wire for the right-rear (same sort of Q for the fronts)? It occurred to me that if the wire lengths were different for the right and left rears that it might result in some sort of delay or imbalance when the receiver sends the audio info. I don't know much about the specifics of how the audio signal travels, so not even sure this is possible...

Thanks for the help...
Jack Bauer Jr is offline  
Sponsored Links
Advertisement
 
post #2 of 97 Old 02-15-2013, 05:45 AM
Member
 
templemaners's Avatar
 
Join Date: Dec 2010
Posts: 38
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
No, they don't need to be the same length.
SimpleTheater likes this.
templemaners is offline  
post #3 of 97 Old 02-15-2013, 06:07 AM
Senior Member
 
Skytrooper's Avatar
 
Join Date: Nov 2010
Location: Baden, Pa.
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 78
Just be sure to use some decent cable, don't be sorry later. I'm not suggesting that expensive stuff, just no junk. I used 14 Ga. for my surrounds. 12 Ga. really jumps up in price and I don't think it's necessary for surrounds.

(LCD - Sony KDL - XBR4) (Receiver - Sony STR-DA4ES)(Blu Ray - Oppo BDP-83) (PS3)( Dish Hopper DVR With Sling) Speakers (L & R - Paradigm Studio 20) (Center -Paradigm CC-470) (Surrounds & Back Surrounds - Paradigm SA-15R in walls) (Subwoofer 1 - Sunfire HRS-12) (Subwoofer 2 - Paradigm PW-2100)
Skytrooper is online now  
post #4 of 97 Old 02-15-2013, 08:05 AM - Thread Starter
Member
 
Jack Bauer Jr's Avatar
 
Join Date: Nov 2008
Posts: 16
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I have a couple of spools of 14AWG CL2 rated speaker wire from Monoprice...

Thanks for the info on lengths and such. Very helpful... Now, if only I could finally make a decision on HTIB (upgrading in a couple of years) vs. spending about $200 more and getting a Denon or Yamaha + Energy Take receiver/speaker combo!
Jack Bauer Jr is offline  
post #5 of 97 Old 02-15-2013, 09:16 AM
AVS Special Member
 
Ivan Beaver's Avatar
 
Join Date: Dec 2005
Posts: 1,628
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 38
Yet another audio "myth".

The myth is that the signal take s time to travel across the wire. And that is TRUE. IF you are talking miles of wire. Most people don't use that much for a home setup.

Use as large a size as you can-and keep it as short as you can-but don't worry about inches. Leave some slack-just not 10' of it.

Danley Sound Labs

Physics-not fads
Ivan Beaver is offline  
post #6 of 97 Old 02-15-2013, 10:08 AM
AVS Special Member
 
Glimmie's Avatar
 
Join Date: Sep 2000
Location: Los Angeles, CA
Posts: 7,813
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked: 174
Yes at audio frequencies wire length time delay is not significant, in fact a joke. Now at hundreds of MHZ or higher, it is critical. Even your modern computer motherboard has timed wire lengths on the PC board.

However you should still keep the distance matched within 10% if longer than 10 feet on the main speakers, surrounds are not critical in this respect. The reason is the wire does have resistance and you don't want the voltage drop on one channel to be audible versus the other.

Here is the unofficial AVS Forum guide to speaker wire:

http://www.roger-russell.com/wire/wire.htm

Note my 10% above 10 feet is purely an educated empirical judgement. I have done no tests or measurements to verify it.

Glimmie's HT Page
Being redone - comming soon!

Glimmie is offline  
post #7 of 97 Old 02-15-2013, 11:17 AM
AVS Special Member
 
SAM64's Avatar
 
Join Date: Apr 2011
Posts: 1,568
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 69
Quote:
The myth is that the signal take s time to travel across the wire.

It's not a myth....it does take a finite amout of time, somewhere around 2/3 the speed of light....nothing noticable to humans though.
SimpleTheater likes this.
SAM64 is online now  
post #8 of 97 Old 02-15-2013, 12:31 PM
AVS Special Member
 
mtbdudex's Avatar
 
Join Date: May 2007
Location: SE Michigan
Posts: 4,141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Liked: 163
Quote:
Originally Posted by Glimmie View Post

Yes at audio frequencies wire length time delay is not significant, in fact a joke. Now at hundreds of MHZ or higher, it is critical. Even your modern computer motherboard has timed wire lengths on the PC board.

However you should still keep the distance matched within 10% if longer than 10 feet on the main speakers, surrounds are not critical in this respect. The reason is the wire does have resistance and you don't want the voltage drop on one channel to be audible versus the other.

Here is the unofficial AVS Forum guide to speaker wire:

http://www.roger-russell.com/wire/wire.htm

Note my 10% above 10 feet is purely an educated empirical judgement. I have done no tests or measurements to verify it.

Before I was active on AVS, I posted this exact same question to the then Sound and Vision forum Nov-2007 and was advised the keep long runs within 10% , even for surrounds, since the trend was same amp power to all channels.

right or wrong, I did this, and it was a PIA, keeping the "extra" wire from 120v source, crossing at 90 deg to 120v source, wrapping in non circualr pattern, etc.
For 7.1 speaker in 14.5 ft x 18.5 ft this meant lots of "extra" (wasted) wire, I used 14ga 4c wire.

RH side wall, extra wire for RH side surround tucked above door frame, this was the most wasted wire, as its counterpart wrapped along the whole back wall to the LH wall.
IMG_5761.JPG

Back wall, extra wire for RH back surround looped as shown
IMG_5763.JPG

I'd like the definitive, engineering, objective fact based response to bring closure to this Q once and for all.
It shows up every few months.
I'm not a subject matter expert, so defer to others who are on this.
SimpleTheater likes this.
mtbdudex is offline  
post #9 of 97 Old 02-15-2013, 12:51 PM
AVS Addicted Member
 
arnyk's Avatar
 
Join Date: Oct 2002
Location: Grosse Pointe Woods, MI
Posts: 13,888
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 442 Post(s)
Liked: 1062
Quote:
Originally Posted by mtbdudex View Post

Quote:
Originally Posted by Glimmie View Post

Yes at audio frequencies wire length time delay is not significant, in fact a joke. Now at hundreds of MHZ or higher, it is critical. Even your modern computer motherboard has timed wire lengths on the PC board.

However you should still keep the distance matched within 10% if longer than 10 feet on the main speakers, surrounds are not critical in this respect. The reason is the wire does have resistance and you don't want the voltage drop on one channel to be audible versus the other.

Now you know why I recommend that people go to 12 gauge. If the longest speaker cable does not cause an audible change, then neither will any of the shorter ones. If none of the cables cause an audible difference, then no audible difference #1 is the same as no audible difference #2, etc. , and the lengths of the cables don't matter. 12 gauge gives you almost twice the assurance that the cable is not causing any audible change.
arnyk is online now  
post #10 of 97 Old 02-15-2013, 07:31 PM
Senior Member
 
Joe Skubinski's Avatar
 
Join Date: May 2009
Location: Buffalo, NY
Posts: 474
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 19
The answer is there is no easy answer. If you hold it to resistance as the only factor (which it is not), you would have to take into account cable Z, amplifier output Z and loudspeaker Z, all as a function of frequency.

Since it would be nearly impossible to accurately answer this question for every variable in a given installation, the easiest answer to insure a balanced sound from all channels is to keep all lengths and spec of speaker cables as equal as possible. To be easier, in less critical systems the front 3 channels should be the same length, and the rears the same, with left to right differences being held to a minimum to maintain soundstage balance.

Be the sage.
Joe Skubinski is offline  
post #11 of 97 Old 02-16-2013, 01:47 AM
AVS Special Member
 
speco2003's Avatar
 
Join Date: Aug 2003
Location: Las Vegas NV
Posts: 2,349
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 20
Quote:
Originally Posted by Joe Skubinski View Post

The answer is there is no easy answer. If you hold it to resistance as the only factor (which it is not), you would have to take into account cable Z, amplifier output Z and loudspeaker Z, all as a function of frequency.

Since it would be nearly impossible to accurately answer this question for every variable in a given installation, the easiest answer to insure a balanced sound from all channels is to keep all lengths and spec of speaker cables as equal as possible. To be easier, in less critical systems the front 3 channels should be the same length, and the rears the same, with left to right differences being held to a minimum to maintain soundstage balance.

WOW that was a bunch of crap.
SimpleTheater likes this.
speco2003 is offline  
post #12 of 97 Old 02-16-2013, 06:47 AM
AVS Special Member
 
SAM64's Avatar
 
Join Date: Apr 2011
Posts: 1,568
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 69
Quote:
Originally Posted by speco2003 View Post

WOW that was a bunch of crap.

+1
SAM64 is online now  
post #13 of 97 Old 02-16-2013, 07:15 AM
AVS Special Member
 
DS-21's Avatar
 
Join Date: Jun 2005
Posts: 3,345
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked: 160
Quote:
Originally Posted by Joe Skubinski View Post

The answer is there is no easy answer. ***

If, that is, one is trying to sell wire. Then one wants to confuse people into believing all sorts of crap, to break down their resistance to even the most outlandish claims.

If one is not a wire marketer, the answer is very easy. The correct length of wires for speakers is long enough to reach from amp to speaker, with a little play to allow movement. And each wire should be of appropriate thickness for the minimum impedance of the loudspeaker and the maximum power the amplifier can generate.

--
"In many cases there aren’t two sides unless one side is 'reality' and the other is 'nonsense.'" - Phil Plait
Serious Audio Blog 
Multichannel music (and video) urban loft living room system 
DS-21 is offline  
post #14 of 97 Old 02-16-2013, 07:30 AM
AVS Special Member
 
Ivan Beaver's Avatar
 
Join Date: Dec 2005
Posts: 1,628
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 38
Quote:
Originally Posted by Joe Skubinski View Post

The answer is there is no easy answer. If you hold it to resistance as the only factor (which it is not), you would have to take into account cable Z, amplifier output Z and loudspeaker Z, all as a function of frequency.

Since it would be nearly impossible to accurately answer this question for every variable in a given installation, the easiest answer to insure a balanced sound from all channels is to keep all lengths and spec of speaker cables as equal as possible. To be easier, in less critical systems the front 3 channels should be the same length, and the rears the same, with left to right differences being held to a minimum to maintain soundstage balance.
I would LOVE to challenge you to a blind listening test regarding wire length.

If you can REPEATABLY pick out the cable that is longer-either by signal delay or level-then you have a much better set of ears than everybody I know. And I hang around with audio professionals-some at the highest level in the industry.

Danley Sound Labs

Physics-not fads
Ivan Beaver is offline  
post #15 of 97 Old 02-16-2013, 07:35 AM
AVS Special Member
 
Ivan Beaver's Avatar
 
Join Date: Dec 2005
Posts: 1,628
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 38
Quote:
Originally Posted by DS-21 View Post

If, that is, one is trying to sell wire. Then one wants to confuse people into believing all sorts of crap, to break down their resistance to even the most outlandish claims.

If one is not a wire marketer, the answer is very easy. The correct length of wires for speakers is long enough to reach from amp to speaker, with a little play to allow movement. And each wire should be of appropriate thickness for the minimum impedance of the loudspeaker and the maximum power the amplifier can generate.
Actually the power of the amplifier does not enter into any speaker cable calculation that I have ever seen.

The only variables are length-speaker impedance and to a small amount the output impedance of the amplifier.

If you know of a formula that takes amp power into consideration-I would love to see it.

Now when you start to get into the MONSTER amps-the size should be of decent size (generally 12 ga is fine for short to med runs)-but I highly doubt anybody using a 14,000 watt amp would be using 18ga wire anyway. if they are-they amp should be removed from them because they are not deserving.

Danley Sound Labs

Physics-not fads
Ivan Beaver is offline  
post #16 of 97 Old 02-16-2013, 08:54 AM
 
diomania's Avatar
 
Join Date: Dec 2008
Posts: 1,389
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 49
Quote:
Originally Posted by Ivan Beaver View Post

I would LOVE to challenge you to a blind listening test regarding wire length.
If he dose take on it, that will mean the end of his retail business. Think about it, if your income source is about to be wiped out, would you willingly let it?
diomania is offline  
post #17 of 97 Old 02-16-2013, 09:34 AM
AVS Addicted Member
 
arnyk's Avatar
 
Join Date: Oct 2002
Location: Grosse Pointe Woods, MI
Posts: 13,888
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 442 Post(s)
Liked: 1062
Quote:
Originally Posted by diomania View Post

Quote:
Originally Posted by Ivan Beaver View Post

I would LOVE to challenge you to a blind listening test regarding wire length.
If he dose take on it, that will mean the end of his retail business. Think about it, if your income source is about to be wiped out, would you willingly let it?

I think that is why a very obvious demo is never seen at audio shows, which is a DBT involving cables, amps or DACs. Same reason why all of the high end audio writers and manufacturers pooh-pooh DBTs. Commercial suicide!
arnyk is online now  
post #18 of 97 Old 02-16-2013, 10:03 AM
AVS Special Member
 
Ivan Beaver's Avatar
 
Join Date: Dec 2005
Posts: 1,628
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 38
Quote:
Originally Posted by arnyk View Post

I think that is why a very obvious demo is never seen at audio shows, which is a DBT involving cables, amps or DACs. Same reason why all of the high end audio writers and manufacturers pooh-pooh DBTs. Commercial suicide!
Why know the truth-when just making it up as you go is so much more fun

Danley Sound Labs

Physics-not fads
Ivan Beaver is offline  
post #19 of 97 Old 02-16-2013, 10:15 AM
AVS Special Member
 
mcnarus's Avatar
 
Join Date: Nov 2007
Posts: 6,017
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
Liked: 270
Quote:
Originally Posted by Ivan Beaver View Post

Why know the truth-when just making it up as you go is so much more fun
Also, much easier. You don't have to learn anything. You don't even need acute ears, because it's all an act.

If you can't explain how it works, you can't say it doesn't.—The High-End Creed

mcnarus is offline  
post #20 of 97 Old 02-16-2013, 10:21 AM
AVS Special Member
 
coytee's Avatar
 
Join Date: Mar 2006
Location: Knoxville, TN
Posts: 1,110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 122

I've always cut to length...  (just to present my viewpoint)

 

That said...  wouldn't a coil of wires to take up the extra length bring other potential issues to the table that a straight/short run wouldn't?

 

I was always had the understanding that a coil of wire could pick up some noise or become an antenna or something goofy like that simply because it's coiled up???

coytee is offline  
post #21 of 97 Old 02-16-2013, 11:05 AM
AVS Special Member
 
Glimmie's Avatar
 
Join Date: Sep 2000
Location: Los Angeles, CA
Posts: 7,813
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked: 174
Quote:
Originally Posted by arnyk View Post

Now you know why I recommend that people go to 12 gauge. If the longest speaker cable does not cause an audible change, then neither will any of the shorter ones. If none of the cables cause an audible difference, then no audible difference #1 is the same as no audible difference #2, etc. , and the lengths of the cables don't matter. 12 gauge gives you almost twice the assurance that the cable is not causing any audible change.

Well yes, it's all about the resistance. However as usual Mr. Skubinski wants to apply RF theory to speaker cables to foster sales.

Glimmie's HT Page
Being redone - comming soon!

Glimmie is offline  
post #22 of 97 Old 02-16-2013, 11:12 AM
AVS Special Member
 
Glimmie's Avatar
 
Join Date: Sep 2000
Location: Los Angeles, CA
Posts: 7,813
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked: 174
Quote:
Originally Posted by coytee View Post

I've always cut to length...  (just to present my viewpoint)

That said...  wouldn't a coil of wires to take up the extra length bring other potential issues to the table that a straight/short run wouldn't?

I was always had the understanding that a coil of wire could pick up some noise or become an antenna or something goofy like that simply because it's coiled up???

Not with a passive speaker. Of course mathematically we can show the phenomena, but it will be far from audible.

Glimmie's HT Page
Being redone - comming soon!

Glimmie is offline  
post #23 of 97 Old 02-16-2013, 11:25 AM
AVS Addicted Member
 
amirm's Avatar
 
Join Date: Jan 2002
Location: Washington State
Posts: 17,809
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 532 Post(s)
Liked: 339
We did a deep dive on WBF Forum on the effects of cable including that of inductance. An interesting theory was put forward that we need to model the speaker as a true complex load and not just a resistor as is commonly done when discussing cables. That did show differences with respect to cable parameters that was not visible when just modeling the speaker as resistor. I built a "Spice" (electronic circuit simulation) of a prototype speaker and actual measurements of speaker cable including its resistance, capacitance and inductance. Then I changed the parameters to see how the response changed with and without the cable. You can read it by clicking on the first link in this google search: https://www.google.com/search?q=site%3Awhatsbestforum.com+cable+theory+page+3&rlz=1C1SNNT_enUS374US375&oq=site%3Awhatsbestforum.com+cable+theory+page+3&aqs=chrome.0.57j58j60.7948&sourceid=chrome&ie=UTF-8

Here is a sample graph showing the before and after the cable waveforms:

1084243849_SwrZv-X2.png

Suggest reading the thread as it was a fun journey with no one on the defensive, allowing a good discussion with real data. If you don't want to bother, the quick summary is that if you keep the cable resistance low, then the impact of inductance becomes negligible. Otherwise, there can be .1 dB or so difference in the audio band per above graph. That said, the point made regarding audibility is right that these are very small differences and likely not heard. Just to be on the safe side, follow the first rule of being a man: if a little bit is enough, more is better and use the thickest cable you can manage. biggrin.gif

Amir
Founder, Madrona Digital
"Insist on Quality Engineering"

amirm is online now  
post #24 of 97 Old 02-16-2013, 01:55 PM
AVS Addicted Member
 
Ratman's Avatar
 
Join Date: May 2002
Location: Collingswood, N.J.
Posts: 14,300
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 91 Post(s)
Liked: 255
Quote:
Originally Posted by amirm View Post

. Just to be on the safe side, follow the first rule of being a man: if a little bit is enough, more is better and use the thickest cable you can manage. biggrin.gif

Most women would tell you the same thing.
Ratman is online now  
post #25 of 97 Old 02-16-2013, 04:04 PM
Senior Member
 
Skytrooper's Avatar
 
Join Date: Nov 2010
Location: Baden, Pa.
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 78
Common sense says cut them to the length you need.

(LCD - Sony KDL - XBR4) (Receiver - Sony STR-DA4ES)(Blu Ray - Oppo BDP-83) (PS3)( Dish Hopper DVR With Sling) Speakers (L & R - Paradigm Studio 20) (Center -Paradigm CC-470) (Surrounds & Back Surrounds - Paradigm SA-15R in walls) (Subwoofer 1 - Sunfire HRS-12) (Subwoofer 2 - Paradigm PW-2100)
Skytrooper is online now  
post #26 of 97 Old 02-16-2013, 08:44 PM
Senior Member
 
Joe Skubinski's Avatar
 
Join Date: May 2009
Location: Buffalo, NY
Posts: 474
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 19
'Loudspeakers: For Music Recording and Reproduction', by Philip Newell and Keith Holland- Chapter 6: 'Effects of Amplifiers and Cables', is a brief and reasonable summary of some research into how cables and amplifiers affect sound, and each other.

http://my.safaribooksonline.com/book/-/9780240520148

http://amzn.com/0240520149

Be the sage.
Joe Skubinski is offline  
post #27 of 97 Old 02-16-2013, 10:32 PM
AVS Special Member
 
DS-21's Avatar
 
Join Date: Jun 2005
Posts: 3,345
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked: 160
Quote:
Originally Posted by Ivan Beaver View Post

Actually the power of the amplifier does not enter into any speaker cable calculation that I have ever seen. ***

I'll give you one from personal experience. Subwoofer with 4Ω nominal impedance, 45' cable run, 1kW of power.

In that circumstance, the 14AWG wire I intended to use would have resulted in less than half a dB loss, but it doesn't meet the 300 circular mils per amp of current rule of thumb. (Why 14AWG? That's what I had on hand.)

Generally, I agree with you, though. At home, outside of a multisub system powered by a central amp (or amp stack) power isn't generally a factor one needs to consider in any speaker power calculation. And perhaps even in the above case it needn't be considered even though on paper it's marginal.

--
"In many cases there aren’t two sides unless one side is 'reality' and the other is 'nonsense.'" - Phil Plait
Serious Audio Blog 
Multichannel music (and video) urban loft living room system 
DS-21 is offline  
post #28 of 97 Old 02-17-2013, 04:52 AM
AVS Special Member
 
William's Avatar
 
Join Date: Apr 2000
Location: Atlanta
Posts: 8,376
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 35
Quote:
Originally Posted by Jack Bauer Jr View Post

...Now, if only I could finally make a decision on HTIB...

....and the OP is asking if it will make an audible difference to a HTiB.eek.gif Can't we all agree that for the OP's situation the simple answer is just NO.biggrin.gif
William is offline  
post #29 of 97 Old 02-17-2013, 05:50 AM
Senior Member
 
jpcamaro70's Avatar
 
Join Date: May 2012
Location: Long Island, NY
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked: 25
Quote:
Originally Posted by William View Post

....and the OP is asking if it will make an audible difference to a HTiB.eek.gif Can't we all agree that for the OP's situation the simple answer is just NO.biggrin.gif

my answer is no. I have 2 5.1's set up and each wire was cut to length. Without any doubt, the answer to the OP's question is no.

My Gear
jpcamaro70 is offline  
post #30 of 97 Old 02-17-2013, 07:18 AM
AVS Special Member
 
Ivan Beaver's Avatar
 
Join Date: Dec 2005
Posts: 1,628
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 38
Quote:
Originally Posted by DS-21 View Post

I'll give you one from personal experience. Subwoofer with 4Ω nominal impedance, 45' cable run, 1kW of power.

In that circumstance, the 14AWG wire I intended to use would have resulted in less than half a dB loss, but it doesn't meet the 300 circular mils per amp of current rule of thumb. (Why 14AWG? That's what I had on hand.)

Generally, I agree with you, though. At home, outside of a multisub system powered by a central amp (or amp stack) power isn't generally a factor one needs to consider in any speaker power calculation. And perhaps even in the above case it needn't be considered even though on paper it's marginal.
But unless you are running SINE WAVES into the loudspeaker (most people don't) then the "average" signal level is "generally" about 1/8th the continuous-or 125 watts for a 1000 watt amp.

Wire capacity number are figured using constant current draws (such as lights). A dynamic current draw (such as audio) is very different.

Danley Sound Labs

Physics-not fads
Ivan Beaver is offline  
Reply Audio theory, Setup and Chat

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off