The 1004 is a mic line amp in a ten series format.
lt shares a similarpreamp/lineampĀ 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