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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 TD-1 is a single-channel DI box. It is passive in its construction, requiring no power whatsoever to run, though components such as an OEP/Carnhill transformer assist in lending the box tone both warm and rich.
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.
The DI box provides a frequency range of 10 Hz to 40 kHz, giving you both a -15 dB pad and a ground lift, should you encounter noise issues. A 1/4" pass-through output is also provided, making this unit very handy in the studio; for instance, you could take a DI off an electric guitar and use the 1/4" pass-through to plug into an amplifier. In this manner, you can record both the sound of an amped guitar and a clean, dry guitar, giving yourself options in the mix. This is but one of the many uses you may find for this feature.
Key Features at a Glance
OEP/Carnhill transformer, made in the UK
-15 dB pad switch
Ground lift switch
Rugged aluminum construction
Recessed switches and connectors for protection
100% through-hole components
WIMA and Nichicon capacitors
1% 1/4W metal film resistors
In the Box
Telefunken TD-1 Single-Channel Passive Direct Box
Limited 3-Year Warranty
Table of Contents
2 x 1/4" jack (1 input, 1 pass through) 1 x XLR output
10 Hz to 40 kHz, ± 2 dB
> 100 kOhms
> 100 kOhms
> +18 dBV
Dimensions (L x W x H)
3.9 x 3.9 x 2.0" / 10.0 x 10.0 x 5.0 cm
17.0 oz / 482.0 g
Telefunken TD-1 Single-Channel Passive Direct Box Review