The JEI Model M-1 is an extension for your SoundBlaster or similar sound card in your computer. The front panel component fits into a 5 1/4 inch drive bay and there is a special card bracket that goes in the rear. Together they provide both speaker and headphone outputs.
This unit is designed for military, intelligence and professional audio monitoring applications.
Monitor input or output stereo, left only, or right only
Speakers can be turned off with a front panel switch
Separate left and right level controls
Inputs: 1/8 inch from your sound card
Outputs: 1/4 inch headphone; 1/8 inch speaker
Controls: Selector switch for input and output; Level controls for headphone output