The DB1 is a passive direct box that allows you to take a Hi-Z instrument and turn it in to a Lo-Z out. A special jack for ground lift eliminates 60 cycle hum. With its heavy duty steel box and high performance transformer, its no wonder the DB1 has been our best selling direct box for many years. The DB1 is made in the USA with Rapco's DBT Transformer - wired in-house to assure the highest level of quality.