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|8/5/2005 5:04 PM|
||Why do magnets affect tone in humbuckers????|
Be gentle with me - it's my first post.
I've been pondering this difficult question for some time now and I believe I have a possible answer.
I have no practical expertise in winding pickups, this is purely theoretical and my theory is a little rusty.
So before I make a fool of myself, can anyone else offer a convincing explanation of WHY stronger magnets apparently produce a brighter tone (with a given set of coils) in a humbucker?
I realize that this is a fairly academic question and that you make pickups with whatever magnets you can get (or whatever sells), but I'd really like to understand what is going on...
|8/5/2005 5:37 PM|
OK fellas lets rip this guy a new.......oh sorry, I'll be gentle Joe Gwinn can probably give you an in depth tehcnical explanation but stronger magnets equal stronger output so a coil that is pushing out more voltage is likely to be pushing out a more full spectrum frequency response, well sorta. I think its kinda like when you turn down the volume pot on your guitar, the treble diminishes. This probably isn't technically correct but it works in theory. When you get into very strong magnets switching from alnico to ceramic then there is a definite reason here why the pickup gets brighter and thats because ceramic has no metal in it to load the coil down, no eddy currents are generated in the magnetic that kill the high frequencies.
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|8/7/2005 3:44 PM|
On 8/5/2005 11:37 PM, Dave Stephens said:
The easiest way to verify this for oneself is to experiment with the volume on a stereo while playing the same CD over and over.
|8/7/2005 4:29 PM|
So you're saying that it's just down to the Fletcher-Munson curves Joe?
Then if we had two identical guitars fitted with identical pickups BUT with differing magnets, playing through identical amps and cabs with identical tone & master volume settings,
and then set the input level to achieve the same SPL - they should sound the same??????
OK it's an impossible experiment....
Seriously though, if it was just an output thing then you could make an A2 pickup sound like an A5 pickup by turning up the input stage of your amp a bit.... Or by playing harder !!
I was sort of hoping someone would want to talk about recoil permeability........
|8/7/2005 5:42 PM|
On 8/7/2005 10:29 PM, Duncan M. said:
[QUOTE]Joe said "the spectrum doesn't change with output, but our perception of the spectrum does change. The reason is very simple - our hearing is most sensitive in the midrange, dropping off substantially at high and low frequencies, so at low volume levels, the highs and lows simply cannot be heard. The lower the volume, the more extreme the effect."
So you're saying that it's just down to the Fletcher-Munson curves Joe?[/QUOTE]Yes, that's exactly it.
|8/7/2005 7:09 PM|
I have searched for "recoil" & "incremental" without success.....
What was the forum's thinking about the significance of recoil permeativity in this previous post?
Can anyone sum it up for me?
|8/8/2005 5:56 AM|
Dig through the forum and maybe you'll find it, there's an archive in a weird spot that maybe someone can point you to. But for alnico 2 its supposedly not as quick pick response, more woody tone, I dunno I haven't done much A2 experimentation but going to try it in my P90s and see if its something noticeable at all. I did do some measurement tests and A2 actually increases inductance readings if you swap out from A5 bar mags in a P90. Slight but measurable, but I haven't listened to the change either. Someone could spend years testing all this stuff and it would end up being private research anyway. I would like to see comparisons between A5 magnets magnetized to A2 and A3 levels of gauss and then see if anyone can hear the difference between that and real A2 A3 mags. Andy says he can hear a difference but thats just one set of ears. Like I said you could spend years on this stuff. Most of us experiment and find out what works that players would like to use and if we have time or obsessive interests try to fit that in between the work a day world......
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