Crest Audio 9001 Professional Power Amplifier. The item "Crest Audio 9001 Professional Power Amplifier" is in sale since Thursday, April 8, 2021. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Amplifiers". The seller is "pasteles1580" and is located in North Hollywood, California. This item can't be shipped, the buyer must pick up the item.