I'm in the process of replacing some caps in a pair of salvaged speakers (Rectilinear Mini III's). One of the caps is supposed to be rated at 87uf. The original is about 1" x 1/2". I couldn't find an exact 87uf cap on PartsExpress so I ordered a 90uf, just to see how close it would be. When I received the new cap I was shocked to see that it measures about 4" x 2". That seems like a huge change in volume for only a 3uf difference. My knowledge of circuits is pretty rudimentary but I'm looking to change that. Any ideas? Thanks.
Greetings, The difference in value of the capacitors is small enough that it shouldn't affect the size in this case. I suspect that the reason for the large difference in size is that the caps are made with different dielectric materials. If you buy a film cap made with polypropylene or teflon as a dielectric, they are larger than a non-polarized electrolytic for a given capacitance and voltage rating. Hope this helps.
Peace,
Dave
P.S. chances are that you will notice differences in the sound between the new and old caps. That is if you had a chance to listen to the speakers before you started on the repairs.
Peace,
Dave
P.S. chances are that you will notice differences in the sound between the new and old caps. That is if you had a chance to listen to the speakers before you started on the repairs.
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