Kraftwerk and m-db, I replaced the 2 caps and all the SMDs on the board. They are quite numerous and small. And you have to pry the boards apart from the foam insulator. Which is glued. I used a steak knife. The sub worked but was much lower in volume than my other one. That does not mean it won’t repair yours. But my amp was bad. M-db, they do not have the whole plate amp, only the amp itself because they still use them in the new subs. They will repair the whole plate amp but shipping to and from Germany will be high. The amp module just plugs in. You have to make sure the amp is for your model because they have to be programmed for different DD subs. The DD-15 and DD-18 use the same amp but different programming. And they all look alike. Here’s a picture of the amp. https://www.ebay.com/itm/145278181171?hash=item21d3411f33:g:MQcAAOSwroNk9GcZ&amdata=enc%3AAQAIAAAA4Dlasd1VpHEE7IZzv%2F56e1lWtlfQ2PXUvSHuVeapZpoxPQ1UD452WTaWHIocJVvedVfo3hbabQ%2BtmOf%2BqqSCDoEIcNFehjJDa6m8hoXp4GPt2Cuyg25ntkxeOhcoHljjSZzIPtPiowt1qZR2b5HY1zQJUqnV1VVPTqO158QP%2FUmCBN1lIhMFVFWLkw1KO2oFF8GBCK1gKxHffCRCd0KS5psP10q0G0dhD67b1v7kQGIbm0SpNx5tWsmp9Cl09X6ImWgjUIaAKn3LISHO%2FOQWbcduTnEtsUr35tY4F6rpSmXD%7Ctkp%3ABk9SR8jS6u_dYg