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Blue Microphones B1 Bottle Cap Cardioid Interchangeable Capsule for the Bottle Microphone

The Blue B1 Small Diaphragm Bottle Cap is an interchangeable capsule for the Blue Bottle studio microphone. A variety of interchangeable capsules are available; each with its own frequency, tonal and pickup pattern characteristic. The B1 is a small diaphragm condenser capsule with a cardioid polar pattern that provides accurate audio reproduction and an extended high frequency response.

Suggested applications for this capsule include acoustic guitar, accordion, drum overheads, metal percussion, hi-hat, small pitched percussion such as toy piano or marimba, room or ambient miking, foley and sound effect recording, strings and orchestral recording.


  • The ultimate in hand-built craftsmanship
  • Class A discrete amplifier circuit with hand-selected EF86 pentode vacuum tube in triode mode
  • Mic system-allows for various capsules to be swapped "on the fly" for extreme versatility
  • Integrated capsule shockmounting
  • Hand tuned and tested
  • Custom Ordered Ships Directly From Warehouse May Take 7-10 Days