JetCityMusic | 1 decade ago

The new Mad Professor Stone Grey Distortion (SGD) is a modern high-gain distortion pedal with unparallelled clarity and definition. This pedal was developed for high gain applications and specifically for clarity at heavy distortion levels.

http://www.jetcitymusic.com/index.php?page=shop.product_details&flypage=vmj_naru.tpl&product_id=532&category_id=35&manufacturer_id=15&option=com_virtuemart&Itemid=89