RS IIIb foam for Tweet-Mid..where to find?
- Thread starter bjack56
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I'll get some measurements from mine this evening and post them. IIRC, the owners manual for these includes the degree of tilt that's built into the bases as well. It's nothing more than a wedge piece glued to a flat base made from a single piece of one-by. I'll have to dig that out of the garage.
Sorry about not responding with the information I promised above. Right after I posted that I was called out of town and just returned a couple of hours ago; I'll try to get that info for you tomorrow.
To answer your questions, my IIIb's have three bolts on the bottom to secure the base to the bottom of the speaker. AFAIK, the tilt is not adjustable.
Not sure on the type of adhesive to use, but contact cement would probably work okay.
The foam is an anti-diffraction treatment to cut down on reflection/diffraction of mid- and upper-frequency sound from the front baffle. The supposed benefit is to improve imaging and soundstaging, which would be blurred or muddied by the early reflections from the speaker cabinet.
RS-IIIb stand specs
I had a chance to remove one of the bases last night and collect some measurements. I created 3 small jpeg files that are attached below: bottom plan, top plan, and side-view of the wedge riser. Hope these give you the information you need. If you need any more measurements or have any other questions, let me know.
I had a chance to remove one of the bases last night and collect some measurements. I created 3 small jpeg files that are attached below: bottom plan, top plan, and side-view of the wedge riser. Hope these give you the information you need. If you need any more measurements or have any other questions, let me know.
Attachments
On the pic you attached, the base is the thin, black shiny piece of wood with the rounded edges at the bottom. The wedge is glued to the top of the base; it's not real thick, so it doesn't really show in that photo.
My bases have 3 holes (the small circles on my bottom view drawing). The bases attach to the speaker with 3 large bolts with tapered heads (the holes on bottom are counter-sunk). The nuts are glued to the inside bottom of the speaker. If there are no nuts inside to thread the bolts into, they may have come loose due to age of the glue; one of mine did, and I had to remove a woofer to reattach it.
The IIIb's were shipped with the bases unattached. The holes in the speakers were plugged with plastic caps for final testing at the factory prior to shipment. These sound like the plastic "glides" you mention.
It appears the holes in the Base drawing are covered by the wedge & the wedge would have corresponding holes. Is that correct?
On closer look the (3) base plate holes align with the holes on my speaker bottom. Don't have a nut in the center hole, will have to look under the glides/caps.
On closer look the (3) base plate holes align with the holes on my speaker bottom. Don't have a nut in the center hole, will have to look under the glides/caps.
Yes, the three mounting holes go through the base and the wedge that is glued on top of the base.