 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
72.36.1.26
In Reply to: how often do you folks tighten driver mounting screws ? nt posted by snkby on March 22, 2007 at 21:54:12:
Gravity can gradually deform the mechanical suspension of a woofer and/or cone driver, eventually causing the voice coil to drag. Non-linear motion of the driver, reduced driver output, and permanent damage to the driver(s) are possible results. If you ever notice a rasping sound coming from a driver, you'll know what has happened. Rotating the drivers 180 degrees once a year can help keep driver surrounds round...
Follow Ups:
Can't say can't happen, but I am not convinced that it is really sag due to gravity or something else.
Had Mende radio build in 1930 with about 8" driver, used without hitch until about 1986 when capacitor crapped (gave it to some guy to fix never to see it again).
Uncle still has Grundig Radio from 50s, no problemsFriend's JBL (can't recall model, with wood grilles) his father bought in late 50-s, still works fine. Friend's AR14 from I think 70's with shredded surround, worked until two years ago when he finally ditched it, similar with friends Dynaudio 21W54 (he finally bough kit to fix it).
My Monitor Audio (RA66?) from early 80-s, still works without problems, etc. etc.As much as tightening bolts, none of the above exhibited any problems. Note that if you really do not know proper torque, it is very easy to overtorque bolt.
I've been doing that for years.
I also store not being listened to speakers on their backs for the same reason.
Wouldnt this cause driver to sag? Just in a dif direction.I dont see the need to do this if fasters need tightening then use locktite or a bit of wood glue on threads.Sun light and O2 damages drivers the most, keep out of sun, cover with clean white cloth, control temp and humidity you can store drivers like this for decades. I have a vintage collection I have never found a driver with such a sag in cone caused but vert storage in cabinets.But YMMV and if you feel the need to store with loudspeakers on backs drivers up go for it but I do see where driver would be easy to damage when stored so hope you dont have kids or pets.I do think removing driver place cone down bolted to board to be best for long term storage but if in cabinets best to leave in normal position
...should rotate her boobs?
Just when you're finally used one being slightly smaller than the other folks like you wanna play switchy!
Gimme a break; :)
d.b.
The spider holds everything in position and I've never seen a spider sag to one side or the other. I have two sets of Altecs that are almost 50 years old with the drivers never rotated and no ill effects. And 12 and 15 inch woofers no less.Of course old Altec drivers are of superb mechanical quality.
Driver sagging has been known to happen on occasion. I was alerted to the potential problem at the Clements loudspeaker website...
And what about the fastener? Are yours threaded inserts? If just screws your going to need to replace with larger size after a few times of this.I have owned 40 year old loudspeakers that drivers never where removed from.I never noticed or heard of any vintage users with this problem.With just a slip of your screw driver you could damage cone etc so why take a chance? If you feel the need to do so maybe every 2-6 years might make more sence to me but with all things audio YMMV.
A cure worst than the ailment. I hope there are no doctors with such ideas frequenting this site,
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
