Rack Mount Preamp/Mixer
Control tailored for the performer/soundman.

 bigger pictures     

 Panel Drawing in PDF format     

 System Diagram in PDF format     
    General Features

        – 4 independent channels with adjustable gain (10 to 50dB)
        – stereo/mono bus with adjustable gain (-Inf to 12dB)
        – 19" single-space (1U) rack-mountable chassis
        – gain/attenuation for mic/line levels
        – low and high impedance loading
        – balanced and unbalanced lines
        – 1/4" and XLR connections
        – phantom mic power





    Channels 1 & 2

        – low impendence balanced XLR inputs (1.3k ohm)
        – phase inversion switches
        – 18 Vdc phantom power switch
        – 1/4" TS outputs (100 ohm, unbal.)





    Channels 3 & 4

        – high impedance balanced 1/4" TRS inputs (20k ohm)
              will accept unbalanced TS connections (10k ohm)
        – 20 dB attenuation switch, for gain range of -10 to 30 dB
        – 1/4" TS outputs (100 ohm, unbal.)





    Stereo Bus

        – stereo/mono switch for each channel pair:
              1 & 2  :   1–to–L & 2–to–R   –or–   1–to–L&R & 2–to–L&R
              3 & 4  :   3–to–L & 4–to–R   –or–   3–to–L&R & 4–to–L&R
        – balanced XLR outputs (100 ohm)
        – 1/4" TRS outputs (parallel to XLR's)
              will drive unbalanced TS connections (50 ohm)