AvSat44 Posted June 17, 2022 Posted June 17, 2022 I'm hoping someone can help me. I've just recently been given a pair of Spendor SP1's to refurbish. This is my first experience with this brand. When I hooked them up, They sounded quite good but I didn't really listen to them for long. I pulled the crossovers which as it turns out have reasonably good quality components installed, although I do prefer air cored inductors and three of the four are iron core. I've decided to let that go as all of the components are within tolerance. So far so good. The cabinets are a mess but I can deal with that and fortunately, the grille material is in really good shape. So I have checked the drivers which are all fine and realised that the mid/bass drivers do not have dust caps (as in the BC1's). To add to my puzzlement the owner provided me with a round plastic disc (about twice as thick as a domino) which he said fell off the 8" driver. There is still one on the other 8" driver. It is glued to the top of the magnet pole which sits down quite a way from the top of the voice coil. I hope the pics give a better description. Why did Spendor do this? What does it achieve? Finally, should these drivers be fitted with dust caps as in the BC1's and if so, is it safe to glue a dust cap (cloth type) to the weird polypropylene cone? I would have thought that having dust caps fitted would be a no-brainer.
VanArn Posted June 20, 2022 Posted June 20, 2022 I call this item,a bung. It is just a cosmetic attachment. If you fit a sealed dust cap, it will cause the speaker's resonant frequency to rise and a porous cloth dust cap should be used.
AvSat44 Posted June 21, 2022 Author Posted June 21, 2022 Thanks for the info. As Spendor have not bothered to respond to my queries, I have already used a cloth cap as you suggested. Cheers.
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