|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
63.142.209.123
especially tweeters
Follow Ups:
Everything affects sound. I agree that a dented dustcover is a minimal issue in a woofer, but if that "woofer" has significant output into the midrange, it may be more problematic. The dynamical behavior of large cones driven with high frequencies is complex. Replacement dustcovers are available from several sources for a few bucks. You can very carefully cut off the old dustcovers and glue new ones on. I'd say stay close to the original material and size if possible.
I have listened pretty carefully to tweeters with dented domes, but only after relieving the dent to the greatest extent possible. It's easy- warm the dome up a little with a hair dryer- take it slow, just a little warmth! Then place your lips carefully over the dome and suck very gently. I'm not jiving you- this works quite well; less well for woofer dustcovers. The dent(s) will pop right out, but there will likely be a few small wrinkles remaining. I have not heard any difference between unsullied ones and the slight wrinkle ones, ever. (Do it when no one is around, eh? That's why they call this an "Asylum.")
If you don't think this is good ju-ju, buy a new pair of tweeters; Madisound will help you select a replacement, for example. Wax the platinum Mastercard before you call.
As long as it's a dome shape, either concave or convex, not flat,..I doubt you'd hear any difference...if it's partially dented, I'd be
tempted to push it ALL in. (If a cone tweeter). The downside is, if it hits the edge of the bobbin, it could buzz. Easy enough to just replace the dustcap on a cone tweeter.
These are to be taken as general comments only from an amateur with no engineering background!
As I understand it, the dustcap in a cone driver is essentially there to keep dust and debris out of the voice coil gap. It has little effect on the driver's ability to move in a linear fashion to an applied audio signal. It is a little disk of material glued to the cone at its edges. If properly designed and placed, a small dent in it ought not to make much difference in the driver's sound. Of course, if some drunk kicks in the center of the speaker, the voice coil or other parts may be mis-aligned and sound will be affected.
A dome tweeter, it seems to me, is far more likely to have its sound negatively affected by dents. The dome is the radiating surface, in direct contact with the air, pumping away at that air to generate sound. It is very small. If the shape of these domes is compromised, so is the geometry of the resulting wave front. I am always very skeptical of sellers of used equipment who claim that a dented tweeter dome "has no effect on the sound". That just seems counter-intuitive to me. If I were buying used speakers, I would want to know whether replacement tweeters were available from the maker and what they cost before I put my money down on dented tweeter domes. I'd typically wait for an undamaged unit.
Perhaps someone with more technical expertise can comment on this?
Best,
George
when my daughter was a toddler, she walked in fornt of my Fried Model RIIs, stopped, looked, listened and then promptly whapped the B110 through the grille (opaque) which dented in its dustcap.
try as i may, i could not undo the dent with all manner of techniques. upon listening, it didn't sound any different. i agree, this would not be the same result in sound had this been the tweeter. i have usually had good much pulling out dented in tweeters and have been fortunate that none of those in my house were metal, ceeramic, or diamond coated.
...regards...tr
I have often asked the same question?
woofer dust caps - NO
tweeter domes - YES
What about mid-range? Maybe?
Midranges are like little tiny woofers ;) Just a cap to cover the voice coil and keep out the dirt.
If the woofer in question is in a two-way design, the dust cap being pushed in affects the midrange.
See:
http://db.audioasylum.com/default.mpl?searchtext=dome+&b=AND&topic=&topics_only=N&author=Jon+Risch&date1=&date2=&slowmessage=&ip=&sort=score&sortOrder=DESC&sortRank=Forum&includeDeletes=No&stalker=&stalkee=&forum=speakers
and look at the first three hits.
These posts will answer your question.
Jon Risch
I bought a pair of ADSL710's. They have a metal grill cover. one of them was slightly pushed in and was pressing on the dome midrange. Probably had been doing that for awhile. I was going to pull it back out with a bent pin. Before I got a pin, I looked and it had popped back out own. The domes used on those speakers are very soft and well made. They sound great. Actually very nice.
Why not just put a mono recording through it and see if you can hear a difference?
Dave
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: