Meal! No, this is not a thread like tens of other same topics. The problem arises as follows;z.zt. I have installed an HX400 in my golf.A final stage with, as I think, a super price-performance ratio.The good piece should now give way to a “something” stronger variant. Task:The final stage is installed under the passenger seat and this should not change.Question therefore; which final stage you can recommend to me when the installation dimensions are not essential are different from the Helix, and still has more power for the classic 3-channel operation? Greetz Arni