Featuring a proprietary circuit designed by Fred Forssel, the TDI Duo from AEA Ribbon Mics is a phantom-powered, 2-channel DI box that supports perfectly transparent conversion from unbalanced Hi-Z to balanced mic-level signals. With Thru jacks for amplifiers and a -20 dB pad for handling hot signals, the TDI Duo is an indispensable tool for the studio or stage.
The TDI offers extremely low noise, interference, and distortion thanks to its JFET analog buffer and superclean Lehle stepdown transformer. Ground-lift switches are provided for eliminating any remaining hum or noise that can arise from grounding loops. Though designed for instrument-level signals generated by passive pickups, the TDI Duo also works great with line-level signals from drum machines, samplers, and synths. Made in the USA, the TDI Duo is built to last with a durable steel chassis, ideal for tours, stage backlines, and years of rigorous studio use.
Simply plug the 1/4” cable from your instrument into the input jack of the TDI, and connect the output via XLR to the next device in your signal chain (preamp, PA, audio interface, etc.), then engage phantom power. With two channels, you can send stereo or dual-mono signals down the line, or send signals to two different locations, which can be particularly useful in live scenarios.