Wimbo Posted June 1, 2020 Share Posted June 1, 2020 (edited) 17 hours ago, jeromelang said: Less stress on the cables themselves. If they are 90 degree bananas, otherwise, no there isnt. Edited June 1, 2020 by Wimbo Link to comment Share on other sites More sharing options...
Wimbo Posted June 1, 2020 Share Posted June 1, 2020 25 minutes ago, andyr said: The Multi-Contact cylindrical ones that I use (gold plated, beryllium copper - very springy!) have a total surface area of about 226mm^2 - ie. the surface of a 4mm tube which is 18mm long. In contrast, the only part of a spade which makes contact with a typical binding post is the bottom surface of the space under the BP nut. If we take a typical BP as an annulus which is 15mm OD and 8mm ID - that gives a total annulus area of 127mm^2. And who told you that? Link to comment Share on other sites More sharing options...
Lochawe Posted June 1, 2020 Share Posted June 1, 2020 2 hours ago, andyr said: True! Multi-Contact banana plugs are very springy. They compress slightly, as you insert them into a Binding Post socket - so they are a very tight connection. With all due respect Andy (noting I have used Multi Contact gold-plated beryllium copper banana plugs and binding posts myself for DIY projects in the past) and not disputing your maths on the surface area calculations, I would suggest that just because it is a 'tight fit', I am not sure that you can assume the outer surface of your banana plug is making 100% contact with the internal surface of the binding post? But as far as banana plugs go, If I had no choice but to use them, these are the type I would use : ) Link to comment Share on other sites More sharing options...
Steam Posted June 1, 2020 Share Posted June 1, 2020 Have been using spades but they are harder to switch between speakers. Anyone care to suggest the best banana plug? Link to comment Share on other sites More sharing options...
t_mike Posted June 1, 2020 Share Posted June 1, 2020 17 minutes ago, Aperalim said: With all due respect Andy (noting I have used Multi Contact gold-plated beryllium copper banana plugs and binding posts myself for DIY projects in the past) and not disputing your maths on the surface area calculations, I would suggest that just because it is a 'tight fit', I am not sure that you can assume the outer surface of your banana plug is making 100% contact with the internal surface of the binding post? But as far as banana plugs go, If I had no choice but to use them, these are the type I would use : ) That logic would also apply to spade contacts. Unless things are lapped together, there is no absolute surface contact. Also, FWIW, silver doesn't lose conductivity with corrosion. Link to comment Share on other sites More sharing options...
Lochawe Posted June 1, 2020 Share Posted June 1, 2020 3 minutes ago, t_mike said: That logic would also apply to spade contacts. Unless things are lapped together, there is no absolute surface contact. Also, FWIW, silver doesn't lose conductivity with corrosion. Yes understood – but I would venture that two flat surfaces under compression possibly have a better chance of maximising potential contact than two cylindrical forms one inside the other? I have used both of these options specifically – and yes, you are correct there is NEVER absolute surface contact in purely mechanical fixings in audio equipment – or most instances for that matter unless there are enormous forces involved and the metals are sufficiently malleable (as in pure copper) to deform into each other – but beryllium is relatively hard and in this instance added to the copper in the banana plugs to increase its tensile resilience to generate its 'springiness'... No absolute truths here of course – all good fun and reminds me of fascinating time I spent a few years ago with an artist friend working with several research nanochemists and engineers working with Atomic Force Microscopy (ATM) and Scanning Electron Microscopy (SEM) exploring the Midas phenomena where atoms are transferred (exchanged) between materials under certain contact conditions. Link to comment Share on other sites More sharing options...
andyr Posted June 1, 2020 Share Posted June 1, 2020 20 minutes ago, Steam said: Have been using spades but they are harder to switch between speakers. Anyone care to suggest the best banana plug? Yes - Multi-Contact banana plugs. See here: https://au.rs-online.com/web/p/banana-plugs-connectors/0531453/ Andy 1 Link to comment Share on other sites More sharing options...
andyr Posted June 1, 2020 Share Posted June 1, 2020 3 hours ago, Wimbo said: And who told you that? Ummm, I measured some that I have W. Andy Link to comment Share on other sites More sharing options...
PicoWattson Posted June 1, 2020 Share Posted June 1, 2020 (edited) Unfortunately corrosion on silver does cause conductivity loss; corrosion on silver being mainly silver sulphide and not silver oxide. Edited June 1, 2020 by PicoWattson Link to comment Share on other sites More sharing options...
pwstereo Posted June 1, 2020 Share Posted June 1, 2020 These Monoprice Affinity are supposed to be a good thing. Unfortunately shipping to AU makes the price look silly for what they are. https://www.amazon.com.au/Monoprice-Pair-Affinity-Speaker-Banana/dp/B072BZJ52K/ref=pd_rhf_sc_p_img_13?_encoding=UTF8&psc=1&refRID=Q43J94S6CN1J3AXKXX9B Link to comment Share on other sites More sharing options...
att23 Posted June 2, 2020 Share Posted June 2, 2020 Not sure if anyone here has seen Krispy’s recent video sharing his experiences/opinions. I’m in the banana camp, but I can see the merits of spade also. Link to comment Share on other sites More sharing options...
ray4410 Posted June 2, 2020 Share Posted June 2, 2020 14 hours ago, andyr said: Yes - Multi-Contact banana plugs. See here: https://au.rs-online.com/web/p/banana-plugs-connectors/0531453/ Andy been using these,the rs component supplied multi contact banana plugs for a while now and can highly recommend them,i soldered mine with wbt silver solder,very happy with sound quality also a nice snug fit,if you wan't to be really fussy apply caig pro gold conditioning treatment to the plugs before inserting into binding post. 3 Link to comment Share on other sites More sharing options...
NADbooffa Posted June 2, 2020 Author Share Posted June 2, 2020 18 hours ago, andyr said: Yes - Multi-Contact banana plugs. See here: https://au.rs-online.com/web/p/banana-plugs-connectors/0531453/ Andy Hi Andy, thanks for the link. They almost look like KLEI classic harmony, but cheaper Cheers. K. Link to comment Share on other sites More sharing options...
bob_m_54 Posted June 2, 2020 Share Posted June 2, 2020 3 minutes ago, NADbooffa said: Hi Andy, thanks for the link. They almost look like KLEI classic harmony, but cheaper Cheers. K. Does that surprise you? 2 Link to comment Share on other sites More sharing options...
Rhythm Willie Posted June 2, 2020 Share Posted June 2, 2020 I have tried a lot of different connectors, mainly spades amp end and bananas on the speakers (all triwired), but many years ago a major speaker designer/manufacturer who sold all the connectors and is now a lifelong friend told me that the cheap auto ring connectors that you can buy a whole bunch for about $4 were actually as good as anything. They are pure copper with a non corrosive coating, I just crimp and silver solder them and add some heatshrink. The copper is a bit softer than the gold plated brass ones, but probably "sound" better. Link to comment Share on other sites More sharing options...
audiofeline Posted June 3, 2020 Share Posted June 3, 2020 I'm starting to think I need to change my banana's on my amp to spades. Any recommendations for good value for money? @Rhythm Willie - the ring connectors you mention sound good value, but I'm preferring a spade to a ring connector. Link to comment Share on other sites More sharing options...
pete_mac Posted June 3, 2020 Share Posted June 3, 2020 Just now, audiofeline said: I'm starting to think I need to change my banana's on my amp to spades. Any recommendations for good value for money? @Rhythm Willie - the ring connectors you mention sound good value, but I'm preferring a spade to a ring connector. You can convert those ring connectors to spades with a couple of deft snips with a pair of side-cutters I've done this in the past and it works very well indeed. 2 Link to comment Share on other sites More sharing options...
pwstereo Posted June 3, 2020 Share Posted June 3, 2020 1 hour ago, audiofeline said: ...the ring connectors you mention sound good value, but I'm preferring a spade to a ring connector. Those connectors are readily available as either the forked spade type, or full rings. https://www.narva.com.au/categories/electrical/terminals/spade_terminal Link to comment Share on other sites More sharing options...
ray4410 Posted June 3, 2020 Share Posted June 3, 2020 (edited) 20 hours ago, pwstereo said: Those connectors are readily available as either the forked spade type, or full rings. https://www.narva.com.au/categories/electrical/terminals/spade_terminal if you are going to use these type of spades use the Narva ones pwstereo listed in the above link,the jaycar ones also supercheap autos and a few other outlets sell the same looking spades but are inferior to the genuine navara spades . Edited June 3, 2020 by ray4410 mistake Link to comment Share on other sites More sharing options...
pwstereo Posted June 3, 2020 Share Posted June 3, 2020 1 minute ago, ray4410 said: if you are going to use these type of spades use the Navara ones pwstereo listed in the above link,the jaycar ones also supercheap autos and a few other outlets sell the same looking spades but are inferior to the genuine navara spades . Narva is the correct spelling and will help with searches. Navara is a Nissan vehicle. 1 Link to comment Share on other sites More sharing options...
Hytram Posted June 3, 2020 Share Posted June 3, 2020 if you are going down the lug route, have a look at Utillux (not spelt Hilux) https://www.te.com/global-en/products/brands/utilux.html?tab=pgp-story 2 1 Link to comment Share on other sites More sharing options...
Hytram Posted June 3, 2020 Share Posted June 3, 2020 (edited) 13 hours ago, Rhythm Willie said: I just crimp and silver solder them and add some heatshrink. A proper crimp will never need soldering, the connection between the 2 metals becomes a gas tight cold weld. I would like to know if adding heat after the crimp might actually dergrade the mating of the 2 metals? and on a side note, never solder wires before you crimp ( its actually illegal on 240v connections) for a bonus 10 points, would anyone like to guess why? Edited June 3, 2020 by Hytram Link to comment Share on other sites More sharing options...
audiofeline Posted June 3, 2020 Share Posted June 3, 2020 Because a soldered wire becomes solid rather than flexible, which would reduce the surface join contact area in a crimp? 1 Link to comment Share on other sites More sharing options...
ray4410 Posted June 3, 2020 Share Posted June 3, 2020 19 hours ago, pwstereo said: Narva is the correct spelling and will help with searches. Navara is a Nissan vehicle. yes thanks for pointing that out,the fact that I actually drive a Navara might have had something to do with the error then again probably just me not checking what I rave about. Link to comment Share on other sites More sharing options...
pete_mac Posted June 4, 2020 Share Posted June 4, 2020 12 hours ago, Hytram said: and on a side note, never solder wires before you crimp ( its actually illegal on 240v connections) for a bonus 10 points, would anyone like to guess why? Because solder is compressible and soldered wires work loose in either a crimped or screw-compression application? 1 Link to comment Share on other sites More sharing options...
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