I have purchased this almost 10 to 15 times for me and my friends family.
if u have a right handset this is the best sound and bass headset at this price range it wont even spoil sound quality even at high volume
it works fine for mobile, desktop, pc
i will personally give bass rating to 4.0
it doesnt have mic thats the reason it works fine with all the device
built quality is great coz I always do rough use and the only headset which came more than 2 years is cx 180
sennheiser is really doing great job in all types of headset and this is the cheapest and best in that segment