I wouldnt mind and underseat sub. But Im not sure if they are compatable with the default head unit. I dont really want to change this as its flush mounted with the dash. I wouldnt like the look of the wasted space with a custom head unit. Any knowledge?
I think you can get an adapter Part Number VAR888, which will allow you to use a sub with the standard HU, it will be much cheaper than getting peugeot to do it. Or if you don't have rear speakers you could do it that way. However it probably won't get good quality with only being the standard HU.