Primo M131

Argonne Primo Calrad M131 microphone
Primo M131 microphone

diameter 62mm / weight 324g

Beautiful Primo M131 in mint condition, was also sold under the name Argonne, Calrad and others. Made in Japan in the fifties and 60's.


This one has the original crystal element. I would say with 100% output! This microphone sounds so very sweet, warm and full.... it is amazing. It has the element placed in the back the way it was original. And this gives this mic that perfect perfect tone. I placed a metal grill behind the chrome grill. You can remove if you like. I installed a new Switchcraft 2501mp connector.

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