I'm looking to install and amp + sub (home made) in the trunk. It's going to be a large heavy box. Do you know of any recommended ways to secure the box to the car without drilling into the car?
320d se 2008 pre facelift
Got stock prof radio [2door, 2 under seat, 2back speakers all wired direct to head unit - no amp].
Thinking about how to add subwoofer [any recommendations????], one with built in amp in the boot. Connect to battery is no problem.
To get audio do I..