The purest tone possible. . 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.

Featuring Custom Large-Core United Transformers. We did the research.

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.

Our 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.

We spent years exploring many versions of this design, experimenting with different winding ratios and alloys; we 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.

It’s not just another DI box — it’s a United. The most exceptional passive DI box built in decades, sports an aluminum, road-worthy chassis that will survive a tour and still impress studio clientele when it gets back home. Its recessed front-panel design protects from both studio accidents and on-stage flying kicks. Removable feet add options for creative mounting.