As with all DI boxes, the role of the phantom-powered TDI range is to facilitate impedance matching and a drop in level. The TDI DUO works by using an ultra-low-noise JFET to buffer the high impedance of your instrument-level signal. The JFET then drives a super-clean step-down transformer which balances the signal. There is a THRU jack paralleled to the input jack. The TDI DUO allows for outstanding sonic performance while minimizing distortion, noise interference, and signal degradation from long cable runs. The TDI DUO can handle extremely high input levels without clipping. Its durable steel chassis can withstand the toughest live or studio environments. The Phantom-Powered TDI pairs great with passive instruments like guitars, basses, piezo pickups, etc. Its 20 dB pad can also flawlessly handle speaker-level signals or active instruments such as synths as well. As with all AEA electronics, this circuit was designed by Fred Forssell. 

• TDI works by using an ultra-low-noise JFET to buffer the high impedance of your instrument-level signal.
• The JFET drives the super-clean step-down transformer which balances the signal.
• Has a THRU jack paralleled to the input jack.
• The TDI can handle extremely high input levels without clipping.
• 48V Phantom powered.
• 20dB pad.
• Ground Lift.

• AEA TDI Duo Phantom Powered Direct Box
• Manufacturer Warranty