Hey,
I've built LM3886 I ordered from chipamp.com. It has been working fine for couple months now. I'm satisfied with the sound, but still I have question.
Wiring from chip to speaker connections is now made with thin wire. Both positive and negative are 0,25mm. Is this too thin? Board has holes for 1,5mm cable. I have 1,5mm cable (solid) and 1,1mm cable (stranded).
Should I change this wire? Solid or stranded?
Do you think I'll hear the difference
I've built LM3886 I ordered from chipamp.com. It has been working fine for couple months now. I'm satisfied with the sound, but still I have question.
Wiring from chip to speaker connections is now made with thin wire. Both positive and negative are 0,25mm. Is this too thin? Board has holes for 1,5mm cable. I have 1,5mm cable (solid) and 1,1mm cable (stranded).
Should I change this wire? Solid or stranded?
Do you think I'll hear the difference
Basically the thicker the better and solid is better than stranded.
2.5mm UK Mains ring main cable is ideal and easilly available and affordable.
As your speaker has an impedance of approximately 6 Ohms at bass frequencies, any resistance in series with the output of the amplifier will attenuate the bass.
2.5mm UK Mains ring main cable is ideal and easilly available and affordable.
As your speaker has an impedance of approximately 6 Ohms at bass frequencies, any resistance in series with the output of the amplifier will attenuate the bass.
Theoretically current can go from one strand to another strand making many different pathes through strand surface that could vary total wire resistance withing short period of time that can be considered like noise. How it can affect sound in a real device questionable of course.
Solid wire means being on a safe side. Litzendraht is another extreme.
I vote for solid as well.
Solid wire means being on a safe side. Litzendraht is another extreme.
I vote for solid as well.
This is utter rubbish. Sorry
Litz wire is not the same as stranded. Each strand is insullated.
Don't forget, we are talking about AUDIO frequency here NOT RF.
How come ?
Please consider this link:
American Wire Gauge table and AWG Electrical Current Load Limits with skin depth frequencies
Due to skin effect I too always knew stranded is better ...
Also I have seen allot of very professorial speaker cables which are stranded and I have never seen any solid conductor speaker cable.
How come skin effect is negligible ?
And what does skin effect has to do with a wire's length ?
Please consider this link:
American Wire Gauge table and AWG Electrical Current Load Limits with skin depth frequencies
Due to skin effect I too always knew stranded is better ...
Also I have seen allot of very professorial speaker cables which are stranded and I have never seen any solid conductor speaker cable.
How come skin effect is negligible ?
And what does skin effect has to do with a wire's length ?
AVE...
1.5mm stranded wire will be enough...
At audio frequencies skin effect can be ignored - in case of stranded wire each strand will conduct the current with it's whole diameter...
You will hear the difference because the original wire you used was too thin and had considerable resistance and voltage drop across it's length. Next time consider the maximum current flowing through the cable and select proper wires...
1.5mm stranded wire will be enough...
At audio frequencies skin effect can be ignored - in case of stranded wire each strand will conduct the current with it's whole diameter...
You will hear the difference because the original wire you used was too thin and had considerable resistance and voltage drop across it's length. Next time consider the maximum current flowing through the cable and select proper wires...
Wouldn't that only be an advantage if the strands were insulated from one another?
I use Cat6 - that's solid core. I'm not the only one. Stranded speaker cables are popular because they're more flexible. Multiple thinner solid cores in parallel helps fix this drawback.
It pretty well is at audio frequencies unless your cable is a fairly thick one. Even then, inductance would probably be more of a concern than skin effect. It certainly is in speaker cables.
I can't think - its only related to the diameter and the magnetic permeability of the conductor I thought. Perhaps pacificblue made a mistake?
Hi,
the skin effect is dependent on the apparent increase in resistance of a conductor when higher frequencies are passed through the conductor.
the resistance of any wire is proportional to it's length, it's conductivity and inversely proportional to it's cross sectional area.
LENGTH must be taken into account.
Would someone care to calculate the skin effect on a 0.6mm diam copper wire feeding 1Apk along 100mm of conductor to an 8r0 load, at 10Hz, 100Hz, 1kHz, 20kHz and 100kHz?
The answers will be instructive to all.
the skin effect is dependent on the apparent increase in resistance of a conductor when higher frequencies are passed through the conductor.
the resistance of any wire is proportional to it's length, it's conductivity and inversely proportional to it's cross sectional area.
LENGTH must be taken into account.
Would someone care to calculate the skin effect on a 0.6mm diam copper wire feeding 1Apk along 100mm of conductor to an 8r0 load, at 10Hz, 100Hz, 1kHz, 20kHz and 100kHz?
The answers will be instructive to all.
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