The FLEA Microphones SM 204/23 Tube Microphone brings one of studio recording’s rarest classic microphone designs back to life with meticulous craftsmanship, premium components, and the rich, musical character that made the original Siemens SM204/23 so desirable.
Built around FLEA’s CK12 capsule, a faithful V2545 transformer recreation, and a 6072-family tube circuit, the SM 204/23 delivers a naturally detailed sound with a full midrange, smooth top end, controlled low frequencies, and excellent dynamic response. Whether you are capturing an expressive vocal, acoustic instrument, spoken word, or room ambience, this handcrafted tube condenser offers the kind of depth, dimension, and musicality that can make a great performance feel instantly finished. FLEA developed the SM 204/23 with close attention to the mechanical construction, circuitry, capsule, and transformer architecture of the original microphone. Central to the design is FLEA’s recreation of the coveted V2545 output transformer, a major contributor to the microphone’s harmonic richness and dimensional character. The self-biasing circuit also gives the microphone generous headroom when working with louder, more dynamic sound sources, allowing it to retain composure while preserving transient detail and nuance. The FLEA Microphones SM 204/23 is equally at home as a premium vocal microphone or a versatile studio condenser for acoustic instruments and ambient recording. Cardioid, omnidirectional, and figure-8 polar patterns are selectable from the included power supply, making it easy to adapt the microphone to close-miking, room capture, ensemble recording, or more creative multi-microphone techniques. Each SM 204/23 is handcrafted in small production batches and individually measured, tested, and inspected before leaving FLEA’s workshop.
FLEA Microphones SM 204/23 Tube Microphone Features
- Faithful recreation of the rare Siemens SM204/23 studio microphone
- FLEA CK12 capsule designed to capture the character of the original CK12
- FLEA replica of the renowned V2545 output transformer
- Self-biasing tube circuit provides excellent headroom on dynamic sources
- Cardioid, omnidirectional, and figure-8 polar patterns
- Rich midrange with smooth high-frequency response and controlled low end
- Natural dynamic response preserves transients and subtle performance detail
- Well suited for vocals, spoken word, acoustic instruments, and ambient recording
- External power supply includes integrated polar pattern selection
- Handcrafted in small production batches
- Individually measured, tested, and inspected
FLEA Microphones SM 204/23 Tube Microphone Specifications
- Directional Pattern: Cardioid, Omni, Figure 8
- Frequency Range: 30Hz - 20kHz
- Sensitivity at 1kHz: 7mV/Pa
- Rated Impedance: 50/200 Ohm
- Rated Load Impedance: min 500/2000 Ohm
- Transformer: V2545
- Capsule: FLEA CK12
- Standard Tube: EH6072A
FLEA Microphones SM 204/23 Tube Microphone Includes
- FLEA Microphones SM 204/23 Tube Microphone
- Power Supply
- Cable with Swivel Mount Connector
- Power Cord
- Wooden Microphone Box
- Manufacturer Warranty
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