Descripción
We are proud to introduce the newest addition to the FLEA
microphone family – FLEA SM 204/23, a meticulously crafted
replica of one of the rarest and most fascinating studio micro-
phones ever produced.
The original Siemens SM204/23 became renowned for its natu-
ral, detailed, and exceptionally musical sound. Over the years, it
has become a highly sought-after collector’s piece and is now
virtually impossible to obtain. Our goal was to preserve its
unique sonic character and bring it back in a form that meets
the expectations of today’s most demanding recording studios.
During the development of the FLEA SM 204/23, we paid me-
ticulous attention to every detail. The mechanical construction,
electronic circuitry, transformer, and capsule were all designed
with one objective: to recreate the sonic character of the origi-
nal as faithfully as possible.
At the heart of the FLEA SM 204/23 is our faithful replica of the
legendary Rohde & Schwarz Henry V2545 output transformer
– regarded by many as the holy grail of microphone transform-
ers. Recreated with painstaking attention to the original’s de-
sign and materials, it delivers the tone, depth, and harmonic
richness that made the V2545 so revered, and it is central to
the authenticity of this reissue.
A defining feature of the SM204/23 is its self-biasing circuit,
which handles high sound pressure levels with exceptional
composure and headroom. This gives the microphone a won-
derfully forgiving character on loud, dynamic sources – another
facet of its unique sonic personality.
The result is a microphone that delivers an exceptionally natu-
ral sound, rich midrange, smooth high frequencies, and a solid,
well-controlled low end. Its dynamic response is equally im-
pressive, capturing subtle nuances and transient detail with re-
markable precision. The FLEA SM 204/23 is an ideal choice for
vocals, spoken word, acoustic instruments, and any application
where authenticity and musicality are essential.
Like every FLEA microphone, the FLEA SM 204/23 is hand-
crafted in small production batches using only premium-quality
components. Each microphone undergoes individual measure-
ment, testing, and final inspection to ensure it meets the un-
compromising standards expected from FLEA products.
We believe the FLEA SM 204/23 will appeal not only to en-
thusiasts of classic studio microphones but also to modern
producers and recording engineers seeking a truly distinctive
sonic character.
LEGENDARY HERITAGE
Inspired by a true classic,
respected for generations.
HANDCRAFTED
Built by skilled hands,
with a passion for perfection.
T E C H N I C A L O V E R V I E W
≈ Large diaphragm condenser microphone ≈
Pattern – – – – – cardioid, omni, figure-8
Frequency range – – – – – 30Hz – 20kHz
Sensitivity at 1kHz – – – – – 7mV/Pa
Transformer – – – – – V2545
Capsule – – – – – FLEA CK12
Tube – – – – – EH6072
PREMIUM MATERIALS
The finest components,
carefully selected.
SMALL BATCHES
Not mass produced.
Crafted in limited batches.








