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The DB-4A from Pro-Co Sound provides four independent "direct-box" channels, housed in a single space, rack-mount chassis. The unit is ideal for the electronic keyboardist and equally well suited to any application requiring the interfacing of unbalanced high-impedance equipment with balanced low-impedance mixer inputs.
The design of the DB-4A allows easy integration with any audio system. Three unbalanced, parallel-connected input/output jacks make "patching in" at virtually any stage of the signal path, a simple task. Signals may be taken straight from the instruments or from sub-mixer outputs.
The unit is housed in a durable chassis constructed from 16-gauge steel and aluminum, utilizing a "uni-box" enclosure. Internally, the specially designed transformers combine superb audio quality with generous noise rejection.
Four channel passive direct box for electric/bass guitars
Floating transformer-balanced XLR output for maximum isolation
Four independent channels for four keyboard, drum machine outputs, etc.
Three In/Out jacks per channel for convenient loop-through
Line mode handles signal levels to +34dBv
Ground lift switch eliminates hum and buzz
Rugged "uni-box" construction for super strength and shielding
Passive design requires no batteries or phantom power
In the Box
Pro Co Sound DB4A - 4 Channel, Passive Direct Box in Rackmount Chassis
Five (5) Year Warranty
Table of Contents
12 x 1/4" TS phone
Any of these may be used as an input or as a loop-through output, as long as only one source is connected to each channel
Ground lift per channel Instrument/line selection switch per channel
20Hz to 20kHz, +/-0.5dB @ -15dBv output
Not specified by manufacturer
19 x 4-3/4 x 1-3/4" (483 x 121 x 45 mm)
4.4 lbs (1.6 kg)
Custom-built impedance-matching transformer optimized for use with high-impedance sources such as electric guitars and basses. It is also very applicable to other unbalanced sources such as keyboard instruments