Hi Otto, when I got my Forester e-boxer this March I thought the same about the Sound system. So after a while of trying some of my past usual equaliser settings I let Google do a search on the problem. Soon found on other Subaru forums that I (like you now) thought the sound was crap. One or two suggested forgetting your usual settings and go for somethink like the attached, which now I find quite acceptable. I like all sorts of music from 60s 70s 80s 90s now and Club, all sound OK now. Hope that helps in some way.

Thanks, I thought about them, but will see how it goes with the dealers first to ensure no warranty issues further down the line.

If you did not want to use main stealers look at Sheffield Subaru Services as an alternative

Totally agree with you and part of the problem is that these items are badged from other manufactures, e.g. Harman, so the real expertise and possible liability is with a third party. Your claim, however, is with Subaru UK. Good luck and hope you have some success but these things are always trying and potentially long winded.

Not sure you can buy just the Y piece - a quick search and it looks like you can buy the whole mid section which includes the Y section. Cheapest on evilbay is £69 As an alternative you could look at getting one fabricated https://www.longlife.co.uk/Longlife-Bristol