Many times, unsuspecting gear, often taken for granted, can make a huge difference.

While passive DI boxes are often seen as dongles or adapters, we prefer to see them as a storefront display window: your goods might be the best available, but you need a glass that is clean, transparent, and unscratched so your goods can shine and be appreciated. The less you notice it, the better. That is why we’ve decided to create our own DI boxes based on 15 years of R&D, tests, failures, and successes.

It would have been impossible to deliver the superior clean passive design of the P DI ONE if Heritage Audio hadn’t already mastered transparent passive signal handling with their R.A.M monitor controller series, specifically with the Baby R.A.M, the undefeated category leader for almost a decade now.

Transformers are the main ingredient in any high-level passive DI, and the only way to master the transformer world is pure experience. We’ve spent the last 15 years designing custom-made transformers with almost every reputable manufacturer in the world, thoroughly measuring different alloys to perfectly adjust the response to what each particular design requires, and finally, we found the best one for the job, the HA-DI. It has the ideal combination of a nickel core for an ultra-transparent signal transfer and MU Metal shielding for protection against any unwanted noise or interference caused by outside sources.