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MCM Crossover Schematic


BR928

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Does anyone have a schematic for the crossover used on the MCM? The stack I have is a four way. The tag says it is Type M-4.

 

The caps have values on them but the chokes only have part numbers.

M-4 A.jpg

M-4 B.jpg

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That looks close, but my network has more components that that. It also uses the 2" Gauss mid driver and not the 4 barrel manifold. Not sure how much that would change it. It's also using 20 mF caps.

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I noticed it didn't look like the same crossover. I will look to see if I can find some other of the M-4

 

If you list the inductor number, someone at Klipsch may know the values:

 

2357

2359

2360

and so on...

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Everything seems to be the same except the MSM section. It has two caps, two chokes and a tap. See markup.

 

The inductors are as follows:

 

2133    two of these in the MWM section

2357    MSM section

2358    MSSM section

2359    MSM section

2360    MSSM section

TA2      MSM section

 

MCMnetworkschematic.jpg

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Usually, the inductors wil not deteriorate, although they can look pretty old and ratty. Those caps I would say most definitely have gone downhill. While the capacitance may be ok, their esr, or equivalent series resistance has increased, which is not a good thing.

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