• Assembled by hand in U.S.A.

  • U.S.A. Custom Made K87 Capsule

  • U.S.A. 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)

  • Beautiful Handmade Wooden Box for protection

       We accept returns within 14 days         after product delivery.

Ultra-premium sounD quality

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. After a long  search we encountered an engineer that was able to successfully create this. Our diaphragms are made on a vintage sputtering  machine using platinum of 1 micron thick. This process makes it possible for us to offer a capsule with that exquisite tonal richness and harmonic depth that truly matches the same sound quality of a genuine K87. Each capsule is made by hand, one at a time, in the USA. 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.

Replica Circuit (87i)

with custom made

Ser-t13 transformer