WTB: ACOUSTAT MK-121-B OR MK-121-C INTERFACE

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I recently acquired some 9" and 8" panels enough to make another pair of Model 6 speakers. I need some MK-121-B or Mk-121-C interface modules similar to the ones in the photos.

Let me know if you have them for sale?
 

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I recently acquired some 9" and 8" panels enough to make another pair of Model 6 speakers. I need some MK-121-B or Mk-121-C interface modules similar to the ones in the photos.

Let me know if you have them for sale?

Keep in mind that the factory-built Model 6's and 8's use a special low frequency transformer to compensate for the greatly increased panel area. That is, the LF transformer provides less boost at low frequencies. Using standard MK-121 components may result in more bass than you'd like. At the very least, you'll probably want to use the yellow transformer tap for the least amount of bass boost.
 
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