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Fixing up a pair of aDs 500

2

2b vintage

New Member
According to the hang tag on the front, these are just plain old 500 speakers. Not L. I need to make new grill frames and was wondering if someone could tell me how thick the grill material has to be so the grill cloth will not interfere with the face of the woofer.

Also am in need of grill cloth. I have settled on black for color. I do not want the drivers to show through the cloth when grills are installed. Any suggestions for source of grill cloth material? I am looking at cloth sold by Simply Speakers. Also looking at Guilford of Maine #FR701 cloth. I know nothing of either.

Previous owner stuffed boxes full with fiberglass insulation. Should it be full? If not, how much is enough?
Thanks in advance.
 
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Stuffing should be at a ratio of 1 to 1-1/2 lbs per cubic foot of cabinet volume. Also check Parts Express for grill cloth. Your grills should be about 1/2 to 5/8" thick. Speakers almost always sound better without grills so make sure yours are easily removable.
 
homebrew said:
Stuffing should be at a ratio of 1 to 1-1/2 lbs per cubic foot of cabinet volume. Also check Parts Express for grill cloth. Your grills should be about 1/2 to 5/8" thick. Speakers almost always sound better without grills so make sure yours are easily removable.
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Thank you for the quick reply. Thanks for the info. I measured the cabinets and came up with about 9/10 of a cubic foot for each cabinet. I did not deduct anything for the space the drivers are using up. According to your instructions this would mean about 1 lb of insulation per cabinet. Would it even be possible to stuff that much insulation inside? The current insulation is the yellow fiberglass. It takes a lot of this stuff to add up to one pound. Did you mean a different type of insulation?
 
Fiberglass is an excellent stuffing material. I'd keep it. Since the cabinet volume is less than 1 cu. ft. and you didn't deduct for the drivers, you might try 3/4# to start and see how it sounds.
 
What’s wrong with the current stuffing? If nothing, bag it while doing any internal work, then put it back in when done. I’ve restored a lot of speakers and have never needed to replace the original stuffing.
 
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