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  • Assembled by hand in U.S.A.

  • SER-K87 Ultra Premium Capsule

  • Custom Made SER-T13 Transformer

  • Replica Circuit (87i) with original 2N3819 FET

  • Finest Styroflex Capacitors

  • Cardioid, Figure 8 and Omnidirectional patterns

  • Low-cut and Pad switches

  • Threaded Shock Mount (like the original)

       We accept returns within 14 days         after product delivery.

Ultra-premium sounD quality

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Genuine-CLASS capsule

second to NONE

The importance of capsule quality cannot be overstated. We wanted to find a capsule with that "magic wow" sound quality that we have only found in a genuine K87 capsule. Each capsule in the Serrano 87 is an exact K87 replica of the finest quality. Our capsule offers exquisite tonal richness and harmonic depth that truly matches the same sound quality of a genuine K87. You will hear the difference!

The Serrano 87 circuit was designed using the genuine vintage 87i schematic. It features the original 2N3819 FET amplifier, properly biased to original specifications. No compromises have been made.​


The SER-T13 transformer in the Serrano 87 simply sounds gorgeous. It was designed after the genuine BV-13 transformer found in the U87i.  Each one is custom made in the USA specifically for the Serrano 87.


Replica Circuit (87i)

with custom made

Ser-t13 transformer