If connected using the aux cable, then these a great and the bass feature is fantastic. However the point of wireless headphones is to be able to use them wirelessly which if you want any bass whatsoever is not possible without a constant 'clicking' noise in the background, I thought I had a faulty product but from reading other reviews online, it appears to be in both the M500 and M700, so will be returning these tomorrow, hadn't bought myself a nice pair of headphones in years and was really looking forward to using these..massive disappointment