My S60 has the normal sound system with 8 speakers, i.e. the simple widebands in the front and rear doors, high performance tweeters in the door (up to MJ2003 as standard) as well as the simple 2-way speakers in the hat rack, sh. also the attached pictures. Radio is the HU-603. I have retrofitted a Grom interface and operate it via the smartphone mostly via Aux-In. Then the original amplifier from Volvo (PA-200) was retrofitted and the speakers in the I also found the equalizer in the hidden radio menu and I already used it. Does it make sense to at least exchange the front door loudspeakers for the high performance? Or does it make more sense to install a normal two-way system at the front? Even the loudspeakers now installed don’t sound so bad and I almost doubt that for small money (~100 EUR) what can be done? or is there a particularly recommendable system? I’ve been out of the topic for a long time, I used to regularly read various car hifi magazines and also made comparatively complex installations. I’ve been looking at systems like Audio System M 165 Plus, Focal 165-A1, Focal IS165 or Rainbow Dream Line DL C6.2. Has someone already changed the speakers in the door in a comparable (speaker) output situation and can use his or her device. Is there any evidence that this is not the case?