@carlsbad Re the copper purity, the Banana Plugs are 93% copper but the SP series spades "utilize C11000 100% IACS Copper which are the highest conductivity coppers available for their respective designs". Note sure how much of a difference it makes but I did like the idea of 100% copper.
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@bigtwin If you like lugs, then solid copper is definitely the way to go. Many traditional bananas have problems. I've had them come apart on me.
So I use silver plated BFA style "banana" plugs. Those have the added advantage of low mass which is the main thing I have against lugs. This is a bit of a sidetrack on this thread but I don't like a huge mass in the signal path like most binding posts are. I make my own binding posts out of the same high conductivity copper you mention but it is 3/16" tubing pressed into a nylon housing.
@carlsbad My experience with Banana plugs has not been that great. Not keeping a tight fit has been my big complaint. I have liked the locking style Furutech makes and the BFA style looks to be an improvement. Right or wrong, I thought the high-quality copper and conductivity would work. Really amazed they sell these spades for $5 per pair. They are solid and well constructed. Makes you wonder what kind of magic dust goes into the connectors you see for $200 each.
I didn't mean to imply I think you should use the BFAs. banana vs lug is always a matter of opinion. I do like your choice of lug. I agree with the solid copper lug. Solid copper is soft but that works with a lug.
I do like that you extended the shrink wrap down onto the lug so that you can't twist one lug into the other while tightening. I've seen amps blown that way.
@carlsbad No worries Jerry. We're just two guys having a conversation about cables. I enjoy hearing other opinions and try to learn something new every day. That part is easier than i like to admit. 😂
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