Secondhand As New dbx Active Direct Injection Box - Part # Di1dbx Di1 Active Direct Injection Box. Item No. Di1. Preloved, as new, dbx direct injection unit. This item was used for approximately 3 months for a band that I accepted a mixing job with but subsequently split up. It would have done no more than 10 gigs. Description: The dbx Di1 is a compact high quality active direct injection box. Ideal for both studios and on the road, the Di1 will ensure audio signals reach their intended destination in both a