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Message: <blockquote data-quote="Safe_Cracker" data-source="post: 5861368" data-attributes="member: 577889">Eh 90 deg mounting isn't all that bad if you know how to stop the breaking. There is excessive play between the board and heat sink groove. I use a small dab of anchor tight marine grade epoxy between key points between the board and the heat sink along the edges. this keeps the excessive play from causing an oscillation during heavy vibration, thus taking the strain off the fets. Keep the amp off the box and you will be fine. One of the best amps I have ever owned was an IA40.1 which uses the same mounting and is heavier, great amp... I thought I saw a pic of the GP pro a while back and it looked like a Zenon board could someone throw up a pic?Polo.</blockquote>

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