Middle part of woofer on speaker rattles

Ethan25

Ethan25

Super Member
On one of my Boston VR M60 speakers, the middle part of the woofer part rattles some if the music is turned up even to just an easy-listening level. Is this something that can be fixed by myself? I have a set of VR M50s I am using in the meantime - and I am on the lookout for a single VR M60 to replace it, but figured I would ask about the possibility of fixing it myself.
 
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I know in some Boston woofers there is a plastic tube glued inside the magnet/coil assembly.
For what purposes? Don't know...Sometimes it gets lose...Cut out dust cap and check.
If it is - just glue it back.
 
If it's not that plastic tube:
Have you tried gently pushing on the woofer cone in various areas while playing? Around the clock so to speak. If pushing on one side or the other makes it stop, the cone is out of alignment. This can be either a damaged speaker from overcranking, or a sagging or detached spider, or a bad surround (or a bad refoaming job). Sagging spider can be cured by rotating the woofer 180 degrees so it sags the other way for a few years. The other causes require more extensive repairs.
 
Turn it upside down as was just suggested and see if that fixes it, if not
and you decide to lift the dust cap, insert stiff plastic inside the gap as if
you are shimming but push it all the way down and see if it catches on the
lip of the voice coil former. If it catches the former is probably bent inward
and pushing the plastic shim in might straighten/fix it.
The rattle sound is often that bent part hitting the metal pole piece.
 
And if it's bent back in there, that indicates it was overdriven and the voice coil former hit the magnet in the rear. Kinda like driving a cardboard toilet paper tube end first into a wall. Usually you can hear a whacking sound when it bottoms out, if it does that too hard or too many times, it gets bent over on the end.
 
Thanks all for the recommendations! I will hook it up tonight and turn it upside down for a bit to see if that helps.
 
check the dust-cap is stuck down tight ..had one of pa cabs do that and i thought it was a blown speaker from the kids i left my system with overnight . pva glue seems to have cured it .
 
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