Welcome! Need support, you got it. Or share your ideas and experiences.
Return to Planar Speaker Asylum
71.239.112.200
In Reply to: RE: Having midrange failure issues, anyone else? posted by Norman M on April 28, 2016 at 10:26:53
Thanks for all the advice so far, so far I have changed the LP card to the 200HZ hopefully that will help take some of the load off of the midrange. I also have replaced fuses in my tweeters from pushing it too hard and I expect that, even the occasional tweeter failure never bothered me as its an easy inexpensive repair,
My beef is that the midrange fuse almost never blows then all of a sudden it doesn't work and I am left with a $1200 expense and a pretty good project to remove the bass mid panel to send back to Magnepan.
And as far as playing it loud, 1st off I'm no kid, just turned 60 this year with that said to me, and people that have enjoyed my system it never seems to be too loud, as you turn up the volume the sound just gets better and better, I don't feel like im really over driving them, then again I do know I have a lot of power and I thought that would help things but I see it just creates other issues.
Its like buying a Ferrari and only driving the speed limit, I didn't build this system NOT to use it.
Again that's for all the advice it is appreciated.
Follow Ups:
"And as far as playing it loud, 1st off I'm no kid, just turned 60 this year with that said to me, and people that have enjoyed my system it never seems to be too loud, as you turn up the volume the sound just gets better and better, I don't feel like im really over driving them, then again I do know I have a lot of power and I thought that would help things but I see it just creates other issues."
All I had intended to imply is that it's customary that "kids" (and there's some leeway there) get a kick out of playing loud. At 60 you might easily be one of their Dads (and for really young kids, their grandpas).
Your room is rather large so would require more speaker output to fill it out even at "reasonable" listening levels.
The speaker design is a compromise so the power handling has to be traded off against coherence (how far down you take the midrange) and detail -which means the thinness and weight/area of the mids - which also reduces thermal stability and tensile strength. For your size room they may have gone too far in taking down power handling in favor of refinement. Fortunately for you, you have the ability to cut the mids out more sharply with the 200hz LR4 XO boards.
Tell us what it sounds like with the sharper XO once you finished adjusting toe in etc. to the new XO.
Hopefully that is the last mid panel you burn..
Are the midrange drivers in the 20-series using 6µm Mylar or is it 12µm?
The 20.1 use 6um in a push pull magnet structure vs. single ended in the original 20 - they figured they can lower the thickness and double up the magnetic field so would keep power handling roughly the same.
It didn't quite work out that way since the magnet board up front raised air flow resistance so they lost thermal dissipation capacity. For most users that is not an issue. For playback in a really large room it does make a difference - hence the burnt mids..
Have you seen how they do this? As they need to do the bass and mid on the same structure. Can they repair the mid without destroying the bass?
No, they have to open both sections - that is why it is so expensive to get the repair done. I don't think they actually repair them in all cases, but put in new driver sections if the mylar is damaged, as would be the case from thermal failure.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: