Wire size and type for gain clone type amp?

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Discussion Overview

The discussion revolves around the appropriate wire size and type for a gain clone amplifier built using the LM3886 chip. Participants explore the implications of using different wire gauges and types in relation to performance and practicality.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant mentions using 16 gauge stranded wire and seeks advice on minimum wire size and type for rewiring the amplifier.
  • Another participant questions the necessity of rewiring if the amplifier is functioning well, suggesting that dropping to 20 SWG could be sufficient.
  • A different viewpoint suggests keeping 16 gauge for critical connections (pins, power supply, speaker connectors) while using 22 gauge for less critical connections, and mentions that even 30 gauge could be acceptable for those comfortable with smaller wire.
  • There is a suggestion that using 12 gauge wire for speaker connections longer than 6 feet may enhance sound quality.
  • One participant emphasizes the importance of determining the actual specifications needed from the amplifier before making changes.

Areas of Agreement / Disagreement

Participants express differing opinions on the necessity and implications of changing wire size, with no consensus reached on the best approach or wire type.

Contextual Notes

Some discussions involve assumptions about wire performance and the specific requirements of the amplifier, which remain unresolved.

JohnM24018
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I have constructed a gain clone type amp based on the LM3886 chip from Texas Instruments. I have wired it using some available 16 gauge stranded wire. It is powered by a centertapped 34 volt (68 volt total) transformer that is fused by a 2 amp fuse. It is working with no issues however I would like to rewire the thing with smaller wire to clean it up. Would you please advise me as to the minimum size and what the wire is called if there is a particular type of trade name. Project wire is unavailable to me where I live. The auction site works best for service and inexpensive shipping. Thank you John.
 
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JohnM24018 said:
I have constructed a gain clone type amp

never heard of the term before

https://en.wikipedia.org/wiki/Gainclone
now that I know what it is, nothing special

JohnM24018 said:
It is working with no issues however I would like to rewire the thing with smaller wire to clean it up.

is it really worth the effort ?? seriously ?

there's an old saying ... " if it aint broke, don't fix it"For only a couple of amps for each rail, you could easily drop down to 20SWG, I wouldn't go any smaller

look up insulated hook-up wireDave
 
Keep the 16ga to pins 1,3,4,5, the power supply, and the speaker connectors. The rest can be whatever is easy to get and work with. I usually use 22ga, stranded if there will be vibration or flexing in use or solid otherwise. I find the solid a little easier to work with. Even 30ga would be OK If you like working with tiny wire.

If you have good speakers needing more than 6 feet (2meters) of wire, you may get better sound using 12ga to them.
 
davenn said:
is it really worth the effort ?? seriously ?
Decide what actual spec you need from this amplifier before you spend more time on it. That's the basis of all 'good' Engineering.