Freebie Speaker cable?

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Tony_R

Well-known member
Oct 20, 2008
17
0
18,520
matt41:
fatboyslimfast:Not really - even something cheap like the Gale 400 strand from Richer Sounds will be more designed with audio in mind, higher current, lower voltage, than mains flex. Normal audio voltages are less than about 50v, whereas the mains cables he has are designed for either 240 or 415v. If you do want to get cable from him, what you need is a multi-stranded (i.e. not single-core) cable capable of carrying at least 15A current - more if at all possible.

This just doesn't make sense current is current what ever the suppy voltage.

Mains flex carries mains with a massive tolerance, have you seen the thickness of a 13amp fuse ..talk sense man, the problem with forums is people spout nonsense as fact and others believe it.

Yes cables differ in capacitance / inductance per meter, but the frequency is relatively low.

You do not 'need' multi core. In fact solid is likely to be of lower capacitance and lower resistance.

It is a low frequency transmission line, from which lots a money is made. I will admit to hearing a difference between solid and stranded cables.

In one of my previous posts, I recommended stranded cable against solid core, simply because I felt that every time I have tried both, stranded always sounded better. I don't know fatboyslimfast's reasons for recommending stranded cable however.

Capacitance is not only determined by whether the cable is multistrand or solid core - it's also down to insulation type, promixity of cores within the PVC shroud etc.

As for current... some amplifiers are capable of supplying steady currents of 12 - 15A into an 8 ohm load (and can go higher as impedance reduces) so peak currents can be as much 30A (and more) - of course this kind of current would only generally be delivered at high volumes - but the capability exists so you have to make allowances for it.

I personally, have managed to cause standard 1.5mm twin flex (2A AC rated) to warm up to the point where the PVC insulation has softened by playing music at a constant 20 - 30W or so (at a party).

It's safe to say that peaks in music do cause quite a demand on current delivery - which is why power supplies are so important in power amplifiers.. and hence cable capacity too....

Of course your last statement:

"It is a low frequency transmission line, from which lots a money is
made. I will admit to hearing a difference between solid and stranded
cables"


Is quite correct - however, money is made by virtue of the fact that different cables *do* give different tonal qualities (I don't believe that it makes a difference to the imaging etc. though - despite claims to the contrary). I am very sceptical when I read quotes like "I now have a holographic sound stage" and "everything is now in 3d" - because this suggests that cables are introducing phase changes to the sound somehow - at differing frequencies too - which is probably an undesirable effect.

Tony.

Footnote: My apologies for the length of this post.
 

Andrew Everard

New member
May 30, 2007
1,878
2
0
fatboyslimfast:Sooo, Twin & Earth 52A (the stuff used to wire showers etc) should be a reasonable bet? Hmmm, might get me down to B&Q to replace that old 79 strand that I'm using...

But it's 2.25 a metre. Richer sounds have Gale 400 for 1.99 a metre...any thoughts on which would be best Andrew?

It's a no-brainer - buy the Gale.

The downside of using cooker/shower cable is that it's a pig to work with, being really stiff and hard to tidy away. Also, unless terminals are really tight, that unyielding nature can lead to the cable continuously springing out and disconnecting itself.
 
A

Anonymous

Guest
Tony_R:matt41:

fatboyslimfast:Not really - even something cheap like the Gale 400 strand from Richer Sounds will be more designed with audio in mind, higher current, lower voltage, than mains flex. Normal audio voltages are less than about 50v, whereas the mains cables he has are designed for either 240 or 415v. If you do want to get cable from him, what you need is a multi-stranded (i.e. not single-core) cable capable of carrying at least 15A current - more if at all possible.

This just doesn't make sense current is current what ever the suppy voltage.

Mains flex carries mains with a massive tolerance, have you seen the thickness of a 13amp fuse ..talk sense man, the problem with forums is people spout nonsense as fact and others believe it.

Yes cables differ in capacitance / inductance per meter, but the frequency is relatively low.

You do not 'need' multi core. In fact solid is likely to be of lower capacitance and lower resistance.

It is a low frequency transmission line, from which lots a money is made. I will admit to hearing a difference between solid and stranded cables.

In one of my previous posts, I recommended stranded cable against solid core, simply because I felt that every time I have tried both, stranded always sounded better. I don't know fatboyslimfast's reasons for recommending stranded cable however.

Capacitance is not only determined by whether the cable is multistrand or solid core - it's also down to insulation type, promixity of cores within the PVC shroud etc.

As for current... some amplifiers are capable of supplying steady currents of 12 - 15A into an 8 ohm load (and can go higher as impedance reduces) so peak currents can be as much 30A (and more) - of course this kind of current would only generally be delivered at high volumes - but the capability exists so you have to make allowances for it.

I personally, have managed to cause standard 1.5mm twin flex (2A AC rated) to warm up to the point where the PVC insulation has softened by playing music at a constant 20 - 30W or so (at a party).

It's safe to say that peaks in music do cause quite a demand on current delivery - which is why power supplies are so important in power amplifiers.. and hence cable capacity too....

Of course your last statement:

"It is a low frequency transmission line, from which lots a money is made. I will admit to hearing a difference between solid and stranded cables"

Is quite correct - however, money is made by virtue of the fact that different cables *do* give different tonal qualities (I don't believe that it makes a difference to the imaging etc. though - despite claims to the contrary). I am very sceptical when I read quotes like "I now have a holographic sound stage" and "everything is now in 3d" - because this suggests that cables are introducing phase changes to the sound somehow - at differing frequencies too - which is probably an undesirable effect.

Tony.

Footnote: My apologies for the length of this post.

You managed to gey my late night rant before I edited it!

Things to bear in mind, capacitance on cables, the major effect is the distance betwen the parallel feeders. These are not coaxial feed lines.

If the designer chooses to wrap the lines things will increase.

Re current handling of mains cable.>

1.5mm Stranded cable is used on main flex, protected by 13 amp fuse.

Lighting circuits use 1 or 1.5mm solid core.

Mains wiring is 2.5mm and is used on ring mains protected by 32 amp trips, can you imagine the tolerance built into this.

If you have had 20 30W causing those types of issues something's wrong.

1000W into a 2 ohm speaker draws approx 22 amps.

If capacitance is really an issue just separating the feeders would drop it dramatically
 

Tony_R

Well-known member
Oct 20, 2008
17
0
18,520
matt41:Tony_R:matt41:

fatboyslimfast:Not really - even something cheap like the Gale 400 strand from Richer Sounds will be more designed with audio in mind, higher current, lower voltage, than mains flex. Normal audio voltages are less than about 50v, whereas the mains cables he has are designed for either 240 or 415v. If you do want to get cable from him, what you need is a multi-stranded (i.e. not single-core) cable capable of carrying at least 15A current - more if at all possible.

This just doesn't make sense current is current what ever the suppy voltage.

Mains flex carries mains with a massive tolerance, have you seen the thickness of a 13amp fuse ..talk sense man, the problem with forums is people spout nonsense as fact and others believe it.

Yes cables differ in capacitance / inductance per meter, but the frequency is relatively low.

You do not 'need' multi core. In fact solid is likely to be of lower capacitance and lower resistance.

It is a low frequency transmission line, from which lots a money is made. I will admit to hearing a difference between solid and stranded cables.

In one of my previous posts, I recommended stranded cable against solid core, simply because I felt that every time I have tried both, stranded always sounded better. I don't know fatboyslimfast's reasons for recommending stranded cable however.

Capacitance is not only determined by whether the cable is multistrand or solid core - it's also down to insulation type, promixity of cores within the PVC shroud etc.

As for current... some amplifiers are capable of supplying steady currents of 12 - 15A into an 8 ohm load (and can go higher as impedance reduces) so peak currents can be as much 30A (and more) - of course this kind of current would only generally be delivered at high volumes - but the capability exists so you have to make allowances for it.

I personally, have managed to cause standard 1.5mm twin flex (2A AC rated) to warm up to the point where the PVC insulation has softened by playing music at a constant 20 - 30W or so (at a party).

It's safe to say that peaks in music do cause quite a demand on current delivery - which is why power supplies are so important in power amplifiers.. and hence cable capacity too....

Of course your last statement:

"It is a low frequency transmission line, from which lots a money is made. I will admit to hearing a difference between solid and stranded cables"

Is quite correct - however, money is made by virtue of the fact that different cables *do* give different tonal qualities (I don't believe that it makes a difference to the imaging etc. though - despite claims to the contrary). I am very sceptical when I read quotes like "I now have a holographic sound stage" and "everything is now in 3d" - because this suggests that cables are introducing phase changes to the sound somehow - at differing frequencies too - which is probably an undesirable effect.

Tony.

Footnote: My apologies for the length of this post.

You managed to gey my late night rant before I edited it!

Things to bear in mind, capacitance on cables, the major effect is the distance betwen the parallel feeders. These are not coaxial feed lines.

If the designer chooses to wrap the lines things will increase.

Re current handling of mains cable.>

1.5mm Stranded cable is used on main flex, protected by 13 amp fuse.

Lighting circuits use 1 or 1.5mm solid core.

Mains wiring is 2.5mm and is used on ring mains protected by 32 amp trips, can you imagine the tolerance built into this.

If you have had 20 30W causing those types of issues something's wrong.

1000W into a 2 ohm speaker draws approx 22 amps.

If capacitance is really an issue just separating the feeders would drop it dramatically

Looks like I made a mistake with converting AWG to mm - and I'm guessing the cable I'm referring to was closer to 0.75mm (it was the cheap "zip cord" provided with car speakers at the time)... and we were running into 4 ohm loads.

However, after a little research I have determined the peak current at 120W into 8 ohms can be in the order of 100A.

And given that music (assuming it's not over compressed!) can consist of a lot of peaks, I think it's fair to say that at average listening levels there will probably be some fairly hefty current peaks, at a guess at least 5 - 8 A depending on amplitude and load of course.

However I do think there is something of a "belts and braces" approach toward speaker cable - but then it can't harm to have more capacity than is required..
 

ursus999

New member
Oct 12, 2013
5
0
0
Chord carnival silver screen is two strands of copper cable with a foil screen, during recent speaker cable tests i stripped coving off 2.5 meters of cable & no one could hear any difference. screen may be handy in longer lengths
 

andyjm

New member
Jul 20, 2012
15
3
0
BenLaw said:
Five year old thread resurrection, good work.

Thread didn't make sense then, and doesn't make sense now.

On a related subject, this forum seems to have died - or is it a time of year thing?
 

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