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Description

The Aspen Pittman Designs AP 1B-FET condenser microphone brings vintage character and modern engineering together in a studio-ready package. Built around a large 1.25" all-brass capsule with a hand-tuned 3-micron gold-evaporated Mylar diaphragm, the AP 1B-FET captures performances with exceptional depth, detail and warmth. Its sound evokes classic large-diaphragm condensers, delivering smooth highs, rich midrange presence and natural low-end extension. Ideal for vocal sessions, acoustic instruments or kick drums, this mic translates every nuance of your performance into a mix-ready recording.

Hand-Built Capsule and Class A FET Circuitry

At the nucleus of the AP 1B-FET lies Aspen Pittman’s signature Class A FET design chosen for its low noise floor, fast transient response and musical harmonic character. A custom-wound nickel-core output transformer adds subtle coloration and warmth, giving recordings the dimensional feel engineers associate with vintage microphones. The magnetically shielded circuit ensures quiet operation even in complex studio environments. Built from black-coated stainless steel with a precision-machined brass head grille, the AP 1B-FET offers long-term reliability and professional polish.

Complete Accessories Kit

The AP 1B-FET comes fully equipped for professional use, flanked by an SM4 shock mount, HM1 swivel stand adapter, APD PFM+ pop filter and a moisture-resistant aluminum carrying case. This complete kit makes it easy to integrate into any recording setup from day one. Designed by Aspen Pittman—the founder of Groove Tubes and a legend in tube and capsule design—the AP 1B-FET carries forward his commitment to sonic excellence. For engineers, producers and vocalists seeking a large-diaphragm condenser microphone that combines vintage warmth with modern performance, the Aspen Pittman Designs AP 1B-FET delivers a coveted combination of tone and craftsmanship.

Open Box Aspen Pittman Designs AP 1B-FET Large-Diaphragm Condenser Microphone Level 2 197881454234
Open Box Aspen Pittman Designs AP 1B-FET Large-Diaphragm Condenser Microphone Level 2 197881454234
Open Box Aspen Pittman Designs AP 1B-FET Large-Diaphragm Condenser Microphone Level 2 197881454234

Features

  • Large 1.25" all-brass capsule with a 1.04" 3-micron gold-evaporated Mylar diaphragm delivers rich, detailed tone

  • Vintage-style non-disk capsule design optimized for classic vocal recordings
  • Warm, low-noise Class A FET preamp captures natural dynamics and depth
  • Magnetically shielded custom-wound nickel core output transformer ensures clarity and smooth frequency response
  • Black-coated stainless steel body with stainless steel head and grill assembly for lasting durability
  • Fixed cardioid polar pattern provides focused pickup and strong off-axis rejection
  • Frequency response from 20Hz–18kHz captures full-range vocals and instruments
  • Includes SM4 shock mount, HM1 swivel stand adapter with locking nut, and APD PFM+ pop filter
  • Packaged in a moisture-resistant aluminum storage case for protection and transport

Specs

  • Type: True Condenser

  • Polar Pattern: Cardioid
  • Frequency Response: 20Hz–18kHz (±1.5dB)
  • Output Impedance: 200 ohm (transformer isolated)
  • Sensitivity (at 1kHz, open circuit voltage): 32mV/Pa
  • Maximum SPL (1kHz at 1% THD): 134dB SPL
  • Equivalent Noise: 22dB SPL (A-weighted)
  • Maximum Output: 3.2V RMS (1% THD)
  • Polarity: Positive pressure on diaphragm produces positive voltage on Pin 2 relative to Pin 3
  • Connector: 3-pin XLR male
  • Preamp Topology: Class A FET
  • Typical Load Impedance: >500 ohm
  • Power Requirements: 48V DC Phantom Power
  • Housing: Black-coated stainless steel
  • Weight: 1.5 lb.

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