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January 19th, 2008, 10:55 PM
#11
Senior Hostboard Member
Originally posted by Old Guy: Technically it's called severely overhung.
Not to be confused with John Holmes....
<font size="2" face="Verdana, Helvetica, sans-serif">I don't know who John Holmes is, but I can imagine..... and wish I couldn't.
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January 20th, 2008, 12:40 AM
#12
Senior Hostboard Member
What McCauley is attempting to do is keep the same amount of turns in the gap. Technically it's called severely overhung.
<font size="2" face="Verdana, Helvetica, sans-serif">Thank you OG, My mistake was assuming that the back of the gap was terminated. If i understand correctly, the voice coil is centered(in regard to it's travel) in the gap when the cone/coil are in their home position with equal amounts of coil ahead and behind the gap.
I don't know who John Holmes is, but I can imagine..... and wish I couldn't.
<font size="2" face="Verdana, Helvetica, sans-serif">Do a Wiki search for the actor by that name, hostboard won't allow the link here.
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January 20th, 2008, 12:58 AM
#13
Senior Hostboard Member
Originally posted by bowtie427ss:
[
<font size="2" face="Verdana, Helvetica, sans-serif">Thank you OG, My mistake was assuming that the back of the gap was terminated. If i understand correctly, the voice coil is centered(in regard to it's travel) in the gap when the cone/coil are in their home position with equal amounts of coil ahead and behind the gap.
[/QUOTE]
Hmm- I think you have it, but just to be sure...
In an under hung topology, the coil at rest is centered in the magnetic gap. All turns stay in the gap, theoretically.
An overhung speaker has a coil longer than the gap. EV comes to mind.
A severely overhung topology has the gap centered in the coil length. Again the idea is to always keep the same amount of turns in the gap, thus improving linearity.
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January 20th, 2008, 04:13 AM
#14
Senior Hostboard Member
Originally posted by RacerXX:
What about this ?
Recommended Enclosure Volume 2.5ft? 70.79L
Not sure what the 210's are, but they've got 2 be a lot more than that.
<font size="2" face="Verdana, Helvetica, sans-serif">I don't think that means much since a 210 is a horn, and McCauley's REV is probably for a bass reflex or sealed enclosure.
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January 20th, 2008, 05:47 PM
#15
Senior Hostboard Member
Well, after much consideration, I've decided that this just isn't the time for me to take this on financially. Work is a bit uncertain now, and I've already got too many unfinished projects. Hopefully, I can return to this idea at a later date.
Thank you all for participating in this thread.
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January 21st, 2008, 12:33 AM
#16
Inactive Member
Originally posted by bowtie427ss:
...If i understand correctly, the voice coil is centered...
<font size="2" face="Verdana, Helvetica, sans-serif">
Linear travel (ignoring suspension) for the overhung coil ends when either end of the coil enters the gap, and for underhungs when either end leaves it. The common way of rating Xmax
Fringe magnetic fields and the suspension causes linearity to be less easily defined. It's easier to measure than predict. If the suspension allows, travel can greatly exceed the "linear" range. The physical travel limit is "peak excursion" or as Altec would say, "max excursion before damage".
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