Marshall ED-1 Edward compressor*This is a preowned pedal. Does have original box, does not have power supply* The ED 1 Edward compressor guitar effects pedal from Marshall gives you more level and sustain than you can normally wring out of your guitar. The ED 1 Edward features attack and compression controls for dialing in your perfect sonic settings precisely. A dedicated emphasis control also lets you choose whether you want to apply more compression to highs or to lows. The ED 1