damonrpayne Posted January 19, 2009 Share Posted January 19, 2009 Someone asked me a question I wasn't comfortable even guessing on. Here goes: I have a 1-woofer speaker. All other things equal, if I were to put a much stronger magnet in there, what would the noticable effects be? * Would the speaker be more "dynamic" (can move woofer in & out faster?) * Would it draw more current? * Would its effciency change? Inquiring minds want to know. Quote Link to comment Share on other sites More sharing options...
Joe Shmoe Posted January 19, 2009 Share Posted January 19, 2009 Good question.... I would like to know that also! Quote Link to comment Share on other sites More sharing options...
Don Richard Posted January 19, 2009 Share Posted January 19, 2009 You would increase the BL product (Thiele-Small parameter) thus increasing the strength of the loudspeaker motor. Quote Link to comment Share on other sites More sharing options...
Mr. RF62 Posted January 19, 2009 Share Posted January 19, 2009 Okay, now that we got that out of the way, what would be the translation for us simple minded individuals?? Quote Link to comment Share on other sites More sharing options...
Don Richard Posted January 19, 2009 Share Posted January 19, 2009 A speaker operates because of opposing magnetic forces - the movable electromagnet formed by the wires wound around the voice coil opposed by the fixed magnet's field. Increasing either increases force, although adding wire to the voice coil increases weight, inductance and resistance and increasing the fixed magnet's strength has no such penalty. Quote Link to comment Share on other sites More sharing options...
damonrpayne Posted January 19, 2009 Author Share Posted January 19, 2009 ALL other things equal, though, increasing the strength of the motor is only creating potential extra loudness right? Hooked up to the same amp and in the same enclosure? Quote Link to comment Share on other sites More sharing options...
Don Richard Posted January 19, 2009 Share Posted January 19, 2009 Increasing magnetic strength affects the results in many ways. There is a thread going on in another forum that addresses some of these: http://www.audioasylum.com/cgi/vt.mpl?f=hug&m=139699 Quote Link to comment Share on other sites More sharing options...
michael hurd Posted January 19, 2009 Share Posted January 19, 2009 If the steel comprising a regular ferrite magnet structure is already saturated, adding more magnet volume or another slug will do nothing for increasing Bl. Adding another magnet slug will increase the mechanical travel if the spider, surround and frame are up to it. Usually in long stroke woofers, added mechanical clearance is beneficial. The grade and type of magnet will determine how strong the gauss in the gap is. IE: you could have a large weak magnet or a small strong magnet ( neodymium ) The width of the gap will also determine how strong the field is. A short stroke woofer can get by with a short coil and tight gap ( no rocking ) and have a higher Bl than a large gapped woofer with a long coil. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted January 19, 2009 Share Posted January 19, 2009 The magnet experiments I've done with tweeters lead me to believe that in tweeters, it would get louder and have a wider frequency response. Quote Link to comment Share on other sites More sharing options...
BEC Posted January 19, 2009 Share Posted January 19, 2009 The magnet experiments I've done with tweeters lead me to believe that in tweeters, it would get louder and have a wider frequency response. Did not work out that way for me. I had really high hopes for this monster magnet tweeter we built, but still could not get above 17 khz. Bob Quote Link to comment Share on other sites More sharing options...
InVeNtOr Posted January 19, 2009 Share Posted January 19, 2009 i just love Bob's little quotes at the bottom of his sig! lol Quote Link to comment Share on other sites More sharing options...
longdrive03 Posted January 20, 2009 Share Posted January 20, 2009 To quote a famous line, "Think you used enough magnet there Butch, I mean Bob"???!!!!??? That think is huge. I bet it front mounted easily???? My first set of barbells didn't weigh that much. How did it sound otherwise???? Quote Link to comment Share on other sites More sharing options...
Guest " " Posted January 20, 2009 Share Posted January 20, 2009 "Did not work out that way for me. I had really high hopes for thismonster magnet tweeter we built, but still could not get above 17 khz. " Thats a shame...it would be an interesting product offering. Quote Link to comment Share on other sites More sharing options...
BEC Posted January 20, 2009 Share Posted January 20, 2009 To quote a famous line, "Think you used enough magnet there Butch, I mean Bob"???!!!!??? That think is huge. I bet it front mounted easily???? My first set of barbells didn't weigh that much. How did it sound otherwise???? It sounded like a K-77M and like our smaller magnet model shown here. Not good enough for me, so we went back to the drawing board. Bob Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.