Telefunken TDP-1 Single-Channel Passive Direct Box

A High-Quality Passive Mono DI for Studio and Live Applications
The Telefunken TDP-1 is a single-channel passive direct box designed for connecting guitars, keyboards, basses, and other 1/4" output instruments to XLR inputs. With a passive circuit requiring no external power, the TDP-1 delivers a warm, rich tone thanks to its premium OEP/Carnhill transformer. Whether used for live performances or studio recordings, this DI box provides superior signal integrity with minimal noise, making it an essential tool for musicians and engineers alike.

Premium Components for Clear and Warm Signal Reproduction
At the heart of the TDP-1 is a UK-made OEP/Carnhill transformer, renowned for its ability to maintain signal clarity while adding warmth and musicality. Every circuit board is hand-assembled using 100% through-hole components, ensuring secure and reliable connections. Gold-plated circuit traces further enhance conductivity, resulting in clean signal transfer with minimal interference.

Essential Features for Noise-Free Performance
The TDP-1 includes a -15 dB pad switch, allowing it to accommodate high-output instruments without distortion. A ground lift switch is also integrated to eliminate unwanted hum and electrical interference, ensuring a quiet and professional-quality signal. These features make the TDP-1 a dependable choice for both stage and studio environments where clean audio is essential.

Rugged and Reliable Construction for Long-Term Use
Built for durability, the TDP-1 is housed in an extruded aluminum enclosure that protects its internal components from wear and tear. Recessed switches and connectors offer additional protection against accidental adjustments, making it a reliable choice for touring musicians and sound engineers. Designed to withstand years of heavy use, this DI box is a solid investment for any audio professional.

Convenient Pass-Through Output for Flexible Routing
Equipped with a 1/4" pass-through output, the TDP-1 allows for simultaneous DI and amplifier routing. This feature is particularly useful for recording engineers looking to capture both a direct signal and an amped signal. Whether used for reamping, live monitoring, or signal splitting, the pass-through output enhances versatility in both studio and live setups.

Hand-Assembled for Superior Performance
Every TDP-1 is hand-assembled with precision, ensuring consistent quality and reliability. The use of premium components such as Amphenol connectors, WIMA and Nichicon capacitors, and 1% 1/4W metal film resistors further enhances the unit’s performance. This meticulous craftsmanship guarantees that each DI box meets the high standards expected by professional musicians and engineers.

An Essential DI Box for Musicians and Sound Engineers
With its passive design, high-quality transformer, and rugged construction, the Telefunken TDP-1 is an invaluable tool for any musician or engineer. Whether used on stage or in the studio, this DI box ensures clean, warm, and noise-free signal transmission with every performance.