Secondhand Drawmer Quad Noise Gate - Part # DS404Used Drawmer Quad Noise Gate Audio Processor. Item No. DS404. Preloved Drawmer quad noise gate unit. This item was used for approximately 3 months for a band that I accepted a mixing job with but subsequently split up. Description: The DS404 Quad Noise Gate has been designed to the highest specification to complement the DS201 Dual Noise Gate, acknowledged as the industry standard gate throughout the world. Recognizing that there are many general