United Studio Technologies Vintage Direct

United’s Vintage Direct bridges the gap between old-school tape operators and modern recordists. When the most demanding recording engineer needs the very best, the Vintage Direct delivers massive sound from its massive transformer. Its circuit design is based around eliminating any of the potential tone-robbing components in the signal path that you're likely to find in a lesser DI Box.

When you need the very best, the Vintage Direct delivers.

While typical DI circuits are simple, the very best depend on great transformers  -  and this is where the Vintage Direct excels.. The design of Vintage Direct was inspired by the earliest hand-wired DI boxes, such as the Wolfbox and Bruce Swedien's Bass Box, both of which used massive early transformers made by Triad, UTC, and others.

Research began with the UTC A12 transformer, first manufactured in the early '60s. Several original transformers were measured to accurately reproduce their winding ratios, bobbin and magnet wire type, and lamination style.

United spent years exploring many versions of this design, experimenting with different winding ratios and alloys; they ultimately settled on a high-nickel lamination and a winding ratio very close to the classics that inspired us. The result: United's US-made 5078  -  one of the largest transformers you'll find in a DI. It delivers a pristine low-noise signal, wide frequency response, extraordinary headroom, and outstanding noise rejection.

United decided that nothing would come between the transformer and source that could rob tone or add noise. Most passive DI boxes use smaller, unshielded transformers reliant on resistor pads, volume pots, and RC network filters before the signal hits the transformer. Vintage Direct has none of it.

Instead, level tailoring in the Vintage Direct is built into the transformer taps of its output, which is far more tolerant of adjustment without affecting tone. Vintage Direct uses three different secondary winding configurations in conjunction with a precision resistor T-pad output attenuator for six evenly-spaced output level settings. True ground isolation mitigates ground-loop hum while tracking.

United built a large, well-shielded transformer that can take any line or instrument-level signal without risking overload. It wasn't cheap, but it ensures pinnacle performance and the highest preservation of tone. Custom audio-grade resistors are made (in the USA) for United by PRP - a component provider for NASA.