Hi! Since I’ve been out of the matter for some time now, I need some help. My Jaguar XF has unfortunately only installed the standard sound system, which I feel tonally as quite “thin” – the subwoofer of the higher-quality Meridian system is missing (which is not really the banger). Volume and basically the sound are going okay, but it simply lacks the basses. At the XF the final stage for the factory sound system is in the trunk and from there the signal is sent to the sound It even has a subwoofer output, but it is undersized and will probably be controlled by increasing the volume, so as not to overburden the mini subwoofer in the spare wheel socket (which I don’t have – which doesn’t matter anyway, since the driver almost doesn’t have anything). My idea is now the following: I would like to connect a four-channel power amplifier to the outputs to the front speakers via high-level input (in the hope that the speakers will be able to reach the next level). I am not sure that this will not be an “audiophile” solution, but it is just not worth renovating the system completely, including door insulation, other front system, etc. For my project (someone has experience, whether this is possible at all with the XF?) I am looking for a final stage, and I am looking for a full frequency spectrum and then use it to operate my subwoofer (phase Evolution 12V – nix Dolles, but enough for me) and to operate the front speakers. the following parameters are met: – four-channel, snapped about 200W – high-level inputs – Auto On/Off – so no remote cable – filter – as small as possible – as cheap as possible Thank you!