Telefunken TF39 Stereo Set

The TF39 Copperhead Deluxe Stereo Set
The TF39 Copperhead Deluxe Stereo Set is a matched-pair configuration of Telefunken's TF39 large-diaphragm, three-pattern tube microphone. The TF39 itself is an expansion of the brand's established "Copperhead" sound, adding three selectable polar patterns — Cardioid, Omnidirectional, and Figure-8 — for greater flexibility in the studio. The Stereo Set takes this a step further by pairing two TF39 microphones that are frequency and gain matched, purpose-built for true stereo recording applications. Rather than assembling a stereo pair from two individually purchased microphones, this set guarantees consistency between the two capsules from the outset. The system ships complete, with a dual power supply, matching cables, mounting hardware, and a locking flight case designed to keep the matched pair safe and organized between sessions.

A True Matched Pair
At the core of this set are two TF39 microphones that are frequency and gain matched to one another. For stereo recording techniques — such as spaced pairs, X-Y configurations, or Mid-Side setups using the TF39's Figure-8 pattern — matching between the two microphones is essential. Small discrepancies in frequency response or output gain between two "same model" mics can subtly skew a stereo image, so a factory-matched pair removes that variable before the microphones even reach the studio. Combined with the TF39's three-pattern flexibility (Cardioid, Omnidirectional, and Figure-8) on each individual microphone, the Stereo Set allows an engineer to configure both mics identically or in complementary patterns, opening up a wide range of stereo miking techniques with confidence that both channels are sonically aligned.
Powering and Connecting the Pair
Rather than requiring two separate power supplies, the Stereo Set is built around the M 901S Power Supply, a dual unit designed to run both TF39 microphones from a single source. This keeps the tube electronics for both microphones synchronized and simplifies setup, cabling, and rack space compared to running two standalone systems side by side. Two M 803 Tube Microphone Cables, each 7 meters in length, connect each microphone back to the shared power supply, giving engineers flexible placement options for stereo miking without being tethered to the power supply's exact location.
Mounting, Protection, and Transport
Every physical accessory in the set is doubled to match the pair of microphones. Two M 703 Shock Mounts isolate each capsule from mechanical vibration, while two M 782 Stand Mounts allow each microphone to be positioned independently on separate stands — a necessity for most stereo configurations, where spacing and angle between the two mics directly shapes the stereo image. Two MS01 Microphone Sleeves protect each capsule individually during storage. All of this is housed in a single FC03S Locking Flight Case, which keeps the matched pair, power supply, cables, and mounts together as one secure, transportable unit — built for the practical reality of moving a matched stereo system between studios or on location.
Why We Love This
Our gear experts appreciate this set because true stereo recording demands precision, and a frequency- and gain-matched pair removes the guesswork. Each TF39's three polar patterns let them tailor stereo techniques — X-Y, spaced pair, or Mid-Side — to the room and source. A single dual power supply keeps both mics running in sync, while the locking flight case means the matched pair travels safely, session to session, without losing that critical consistency.
Features:
- Two frequency and gain matched TF39 microphones
- Three selectable polar patterns per microphone: Cardioid, Omnidirectional, Figure-8
- Large-diaphragm tube microphone design (Copperhead sonic character)
- M 901S dual power supply for both microphones
- Two M 803 tube microphone cables (7m each)
- Two M 703 shock mounts for independent vibration isolation
- Two M 782 stand mounts for flexible stereo positioning
- Two MS01 microphone sleeves for individual capsule protection
- FC03S locking flight case for secure transport and storage
- Purpose-built matched pair designed specifically for stereo recording