They might let you do that up there, but if you read the class matirx it states under amplifier quanity one. Granted if its a local sho the judge might let it slide especially if the othe ramp is on highs, but at regional or multi point events they make you sitck to the rule and will have you pull the amp to the highs, some settle for just removing the fuse others make you pull the amp from the car.
Its about 15 pages of readin but the first page sums it up pretty well.
http://usaci.forumotion.com/general-discussion-f11/ddm3-protest-results-t3219.htm?highlight=ddm3