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Telefunken TDA-1 Mono Active Direct Box

33,890

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Estimated delivery dates: Feb 23, 2026 - Feb 26, 2026

In stock

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Useful in connecting a guitar, keyboard, bass—or indeed, any other instrument with a 1/4″ output—to an XLR input, the Telefunken TDA-1 is a single-channel DI box. The unit utilizes active, discrete class-A FET circuitry which, when coupled with components such as an OEP/Carnhill transformer, helps you to achieve a tone with clean, high headroom and a warm, saturated timbre. The TD-1 sports other constructive features which recommend it heartily; for instance, its printed circuit boards are assembled by hand with through-hole components; this ensures both security and reliability in its connection points. Additionally, all circuit traces have been gold-plated to bolster conductivity, while the circuit itself has been encased in an extruded aluminum enclosure. As such, you’ll find it more than suitable for the wear and tear of gigging.

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TDA-1 Mono Active Direct Box

The single-channel active TDA-1 phantom powered direct boxes utilize top quality components in a modern take on classic circuitry to deliver a full, rich sound that both complements and retains the natural tone and character of the instrument. By pairing discrete Class-A FET circuitry with a high quality, European-made transformer and a rugged metal enclosure, the TDA DI’s provide exemplary sound quality and reliable performance. The circuit boasts a frequency response of ± 2dB from 20 Hz to 70 kHz with extremely low distortion and self-noise, and each individual unit is manually tuned for the lowest possible distortion figure in TELEFUNKEN’s US facility. This careful attention to detail and high-quality component choices result in a harmonically rich low end and a detailed, open high-end. On the TDA-2, each channel features its own independent -15dB pad, ground lift, and +48V phantom power LED indicator. Every TDA unit is assembled, tuned and tested in Connecticut, USA.

Telefunken TDA-1 Mono Active Direct Box
Telefunken TDA-1 Mono Active Direct Box (2)

Features

• Custom-wound OEP/Carnhill transformer, made in the UK
• Phantom powered class-A discrete FET circuitry
• Switchable -15 dB pad and ground lift
• All metal construction
• Recessed switches and connectors
• 100% through-hole components
• Assembled, tuned and tested in the USA
Telefunken TDA-1 Mono Active Direct Box (7)
Telefunken TDA-1 Mono Active Direct Box (6)
Telefunken TDA-1 Mono Active Direct Box (5)
Type:

Active Direct Box

Input Connections:

1/4″ Jack

Frequency Range

20 Hz – 50 kHz, ±1 dB

Transformer:

Custom-Wound OEP/Carnhill

Output Connections:

XLR Output, 1/4″ Thru

Maximum SPL (for 1% THD):

+3.5 dBV (no pad); +18 dBV (with pad)

Output Impedance:

< 250 Ω

Dimensions

100 mm L x 100 mm W x 50 mm H

Weight:

465 g

Input Impedance:

> 30 kΩ

Power Source:

+48V Phantom Power

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