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Spendor SP-1 Phase Plugs

T

trwham

Active Member
I picked up a pair of Spendor SP-1s a few months ago. I thought these were supposed to have phase plugs in place of dust caps on the woofers, but there is nothing on the pair I have. I e-mailed Spendor, and they are no help at all, and very slow to respond as well.

Does anyone know what these should look like and/or have any idea where to get some?
 
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These SP-1's were supposedly out of the box new, sans a "phase-plug" when I got them. As I look at the driver it doesnt appear to be missing nor ready for an adaptor plug of any sort.
 
Last edited:
tubed said:
These SP-1's were supposedly out of the box new, sans a "phase-plug" when I got them. As I look at the driver it doesnt appear to be missing nor ready for an adaptor plug of any sort.
Click to expand...

Thanks. That's what these look like and I agree it is not obvious there was ever anything on the woofers.
 
My sp2s have a grey plastic plug glued to the pole-piece just as your photos seem to show. The metallic-looking plug is not deep-maybe half.an inch thick, and it is just a disc like a thick game checker. I believe that it was used to fill the hollow coil former space above the pole piece in order to avoid the cavity resonance and to reduce the turbulence such a cavity would create. If the bass-mid were intended to be used way up into the treble then the protruding roundy-pointy type you often see would be appropriate.
 
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