Marshall Graphics Systems

The 1004 is a mic line amp in a ten series format.

lt shares a similarpreamp/lineamp  section to the 1073/1084.

The line section ranges from 0dB to +6dB and the mic section ranges from 20dB to 65dB of gain.

lt has a selectable hi pass filter same as in the 1073.

Phase switch to invert polarity 180 degrees.

Direct input for line instruments such as guitar,bass and keyboards.

Same pinout as 1073/1084