my 2015 range rover sport fitted with the upgraded sound system.
when the base and volume is turned up the outside door skins rattle like an old cortina!!!
i have the car in guy salmon but they said there is nothing wrong but it sounds terrible
there answer turn the base down !!!! anyone having similar problems?

update 18.05.2016
Took it to an independent technical audio specialist who advised that this is common due to not having no sound
Insulation on any of the external panels. The door skins were tested for movement and moved between 1.5mm and 3mm and droned and rattles with the base turned up. He said would not expect a car of this value to have this problem.
Supplied technical report to land rover and they said nothing wrong with the car it’s to spec!!!
So now taking more action against the dealer and land rover as I know they have other complaints regarding this issue.

update 16.06.2016
got a letter from land rover stating if i try to fix the problem they will void my warranty!!!!
i have tried to reach an agreement with them but no use.
now contacting watch dog/ what car/ ombudsman/ trading standards etc
what a joke

UPDATE 23-8-2016
DEKRA has been out and check the car and have confirmed to the finace company that there is excessive droning and rattles from the doors and trim internally and externally. finace company black horse just waiting for an update then will offer me a resolution.