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Installing Bucket Magnets


Hey folks, im getting ready to install some Bucking magnets in my JM Lab 707s and a pair of Velodyne Subwoofers in order to shield them for the TV.

Looks straight forward, epoxy the magnets to the rear of the drivers.

Has anyone done this before? Any complications you have come across that i should know? Any advise?

Thanks!
slappy
bright_star_audio
179 posts
 
Hi Slappy,

The added mass to the rear of the driver will change its resonance characteristics. The voicing of the speaker system in the range of that driver may be affected.

Best,

Barry Kohan
merganser
216 posts
 
While Sean is 100% correct that the magnets will change the driver Q, it is ever so slight that I know of no one that could hear a difference.

5 minute epoxy works very well and if you don't like the sound after installing them just take a sharp chisel, work it around the edges and pry the magnets off.
ghostrider45
449 posts
 
If this is one of the servo controlled subs, be careful. Changing the electrical parameters of the speaker may make the servo system unstable.
slappy OP
903 posts
 
Not a servo sub. DLS-4000, top of the line model of a mid level product line. LOL
theaudiotweak
2,801 posts
 
Every answer posted is the correct answer. I used in the past bucking magnets to make a shielded center speaker before ther was such a thing..We used silicon and wire ties to hold everything in place till all was cured. The sub may not be a factor...because of location and height relative to the crt's placement..Tom
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