[SteveC]

4 weeks ago I collected my M135i....few days later I commented that I was a little underwhelmed with the HK sound system which I felt had a slightly boomy, 'one note' bottom end. I speculated that it may need time to run in.

Well that was indeed the case. Yesterday, after about 20 hours of playing, I sat in the car with engine off for another 'listen' and the system has improved markedly. Bass is now far more agile and musical....the system 'images' extremely well (for a car) and has exceptional pace, rhythm and timing. If its anything like domestic hi-fi, it will probably continue to improve up to around 50-60 hours playing time.

Its also taken me quite some time to get the seats perfectly positioned, but I think I've now found the spot. Sitting in my garage, playing music at realistic levels, I was struck by what a beautiful and accomplished car this is.