Useful in connecting a guitar, keyboard, bass—or indeed, any other instrument with a 1/4" output—to an XLR input, the Telefunken TDP-2 is a dual-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 TDP-2 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, while both its channels give you a -15 dB pad and a ground lift, should you encounter noise issues. Since each channel has its own, separate controls, you can run two instruments at the same time through the TD-2, thus keeping the footprint down on stage or in the studio. 1/4" pass-through outputs are also provided on each channel, 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.

2-Channel DI Box    Connects 1/4" Instruments to XLR Inputs    2 x 1/4" Inputs    2 x XLR Outputs    2 x 1/4" Pass-Through Output    Switchable -15 dB Pads    Ground-Lift Buttons Minimizes Hum

• 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
• Amphenol connectors
• WIMA and Nichicon capacitors
• 1% 1/4W metal film resistors

Related Questions and Answers

Q: 1. Would this be what I need to bridge the gap between a standalone DAC (with RCA outputs) and JBL 305 powered monitors?

A: You do not need a di box to connect the DAC to a monitor, you just get the cables (1 per monitor). Please see attached link https://bhpho.to/2SMHJK9

Q: 2. Anything the other way round? I need something affordable with Low-Z input and Hi-Z output - the opposite of this device.

A: Perhaps you can use the Hosa Technology Impedance Transformer XLR Female Mic Lo-Z to Instrument 1/4" Male Hi-Z (B&H # HOMIT43) or Audix T50K Impedance-Matching Transformer (B&H # AUT50K) if you can work with an XLR Low-Z input.

Q: 3. I just bought 1 of these a few days ago from you. It showed up today and the 3.5mm end is not solid black like the one in the picture? Why is it different. I really wanted the black end. Could you see if that is still available like that? Thanks

A: It is not unusual for a manufacturer to change a small non-critical production feature or cosmetic component that wouldn't affect performance. We do not have another version available.

Q: 4. If you use only the left XLR output does it sum to mono?

A: The unit would not sum the two inputs to mono to the left output.

Q: 5. Can the RCA and 1/4 inputs be used at the same time? If so are the signals mixed together for xlr outputs?

A: Technically yes, you could use those two inputs at the same time. However, the audio coming out of the XLR's would be mixed together, and potential phase cancellation could occur from combing audio sources in such a manner.

Q: 6. Are the rack ears reversible?

A: Thank you for your question. The rack ears on the this unit are not reversible

Q: 7. Can the xlr side be used as input or is it only output?

A: No. The XLR side of the RapcoHorizon LTIBLOX Laptop BLOX 1-Channel Passive Direct Box is an output only

Q: 8. Is this used for connecting consumer grade line level signal -10dBV gear to pro grade line level signal +4dBu gear?

A: Although the dbx DJdi 2-Channel Passive Direct Box's continuously variable input signal attenuator can accommodate a wide range of signal levels, it is not specifically designed for connecting consumer level products to professional gear. The main function of the DJdi is accepting unbalanced input signals and converting them to balanced output signals, and functions best in standard DI applications such as sending a guitar signal to a mixer.

Q: 9. What happens if I connect to all three input possibilities at the same time; 1/4" TS, RCA, and 3.5mm TRS. Will it prioritize one over the others and output from only one source, or will it blend all three sources before outputting via the XLR outputs?

A: The direct box is intended to be used with one input source only. If three sources are connected to three different inputs they would be blended together into one signal which may have issues with phasing.

Q: 10. ground lift switch positions which lifts ground?

A: Yes, the DIB-443 has a built-in ground lift. Best regards, Hosa Support.