The dbx Model 400 is a Program-Route Selector designed to manage signal paths between tape decks, noise reduction units, and sound processors. The unit is mountable in a standard 19-inch equipment rack and requires no special cooling. It allows users to switch sound processors (equalizer, expander, imager) into or out of the signal path using front panel buttons.
The manual details the operation of various buttons, including Sound Processors, Pre/Post/Copy positioning, Monitor selection, and Noise Reduction encoding/decoding. It also explains how to connect the unit to a preamp, other dbx or non-dbx noise reduction units, and multiple tape decks for recording and dubbing purposes.
| Mounting Standard | 19-inch equipment rack |
|---|---|
| Cooling Requirement | No special cooling required |
| Power Requirement | 5 watts AC power |
The carton contains the Model 400 unit, the instruction manual, a set of hookup cables, mounting brackets, and a warranty/registration card.
To bypass the processors, leave the corresponding buttons (Sound Processors 1, 2, or 3) out; the signal will not go through them.