Alpine MRA-D550 5 Channel Digital Theater Amplifier Condition is Used. The item “Alpine MRA-D550 5 Channel Digital Theater Amplifier” is in sale since Thursday, May 7, 2020. This item is in the category “Vehicle Parts & Accessories\In-Car Technology, GPS & Security\In-Car Entertainment\Subwoofers”. The seller is “andyp2813″ and is located in Wateringbury. This item can be shipped to United Kingdom.