As a lower-cost alternative to the D.W. Fearn VT-I/F Vacuum Tube Instrument Interface DI, we have the Passive Direct Box. This single-channel DI uses the top-of-the-line Jensen direct box transformer in a heavy-duty cast-aluminum box, finished with the same high-quality polyurethane paint as the other D.W. Fearn products.

It features dual 1/4-inch phone jacks for Instrument and Amp, a Neutrik gold-contact male XLR output connector, and a ground-lift switch.
The Passive Direct Box is ideal for recording any electric instrument, such as bass, electric guitar, electronic keyboards, etc. The high-impedance input is designed to properly match any instrument designed to normally feed a guitar amp. The output is 150 ohms, balanced, at mic-level.