I was looking for a good stereo headset to replace a home cinema that I could not use Because the neighbors. Disappointed with the basic RS160, I traded against the RS170 which includes an option of enhanced bass and simulated surround sound. Tested on musical commédies, the two faculties activated, a real treat ... Even at high volume, the sound is clear, undistorted bass present but not invasive, the stunning surround! ... And quiet neighbors! Only flat, in the case of a closed helmet ... the phone can ring ... you're somewhere else!