On Order. 45 Day Lowest Price - 100% Satisfaction Guarantee. The Aguilar DB 900 is a stand out direct box for any instrument. A single 12AX7 tube is utilized in a linear fashion to keep the noise floor extremely low while creating tremendous headroom and an environment where the signal opens to its fullest potential without coloration. Designed for both studio and stage use, the DB 900 is becoming a favorite for top producers, engineers, and players around the globe.