The VDI is a single-channel, all-triode vacuum tube DI (“direct box”) for recording electric or electronic instruments. The inputs are designed to provide the proper load impedance for all instruments that have a 1/4-inch phone jack output. Tube circuitry provides the very high impedance necessary to capture all the details of these instruments.
The outputs of the VDI are mic level (150 ohm source impedance at a nominal -30dBV). The VDI is designed to operate into a high-quality microphone preamplifier like our VT-1 and VT-2 Vacuum Tube Microphone Preamplifiers The operation is very simple: plug the instrument into the 1/4” front panel jack and take the output from the XLR connector. A second 1/4” jack provides an output to feed a guitar amplifier when necessary. A ground-lift switch helps eliminate ground loop buzz.