Marshall ED-1 Compressor Pedal - Used

The Marshall ED-1 Compressor pedal is retro in design, and is comprised of four adjustment knobs that control Emphasis, Volume, Attack and Compression settings.

The Emphasis function (Hi/Lo adjustment and everything in-between) allows the user to select which end of the tonal spectrum you wish to emphasize. For example, turning the Emphasis knob to Hi will allow the high end on your guitar to ring freely while the low end will be compressed and vise versa for the Lo setting. Setting the Emphasis knob to center will allow even compression across the entire tonal spectrum.

As for the remaining three functions: Volume controls the level of sound, Attack controls the level of the initial strike of the note/string, and Compression adjusts the amount of compression desired.

The ED-1 is housed in a heavy-duty metal chassis with chrome metal knobs, a metal button-style foot switch, an LED to display On/Off status, and standard nine volt battery compartment (and a jack for an optional AC adapter).