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Thermal Distortion your loudspeaker most likely suffers from it. But do you care?

 Thermal Distortion is much more serious than just a maximum power handling limitation or side effect.TD is overlooked by most manufacturers as there is no easy (low cost) solution and TD is audible and measurable most of the time at most power levels. TD is caused by the conductive metal (aluminum, copper, or silver) voice coil getting hotter when you pass electrical energy through it. The more power you pass through it the hotter the metal gets. The hotter the metal gets the more the electrical resistance increase. The efficiency goes down and you need to ram in more and more power for smaller and smaller increases in SPL. It can be the reason you get fatigued while listening. If you are running massive power you are creating more TD in your transducers. But do you care? And is it a reason some prefer horn-loaded designs or SET-powered systems since they have the least problems with TD? 

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Showing 1 response by audioman58

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audioman58
4,245 posts
 

The Xover helps to relief stress high quality Xovers are one Big thing most mags don’t address unless spending over $20 k even then not top parts quality,

personally I have been  doing high  quality Loudspeaker upgrades for years, 

for example mode use $3 mox resistors ,or low cost ceramic , myself

Top quality$30 each Mundorf Ultra ,or Path audio resistors  and very low e noise capacitors , and quality large Copper open core or Foil inductors ,

many use cheap bobbin type ,or sledgehammer wire around amagnet  these inductors dissipate heat away from the driver , if you buy a quality loudspeaker, then most of these heat issues will be addressed .

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