- would not recommend the M4s for $25. It also looks like these negative comments for the M4 are rustling your jimmies I ordered the M4s last time around. Delivery and service very good, not very good sounding headphones - very bass-heavy, not very good elsewhere either. Weird looking EQ on Poweramp to try to make them sound half-decent. (And I'd forgotten how bad IEMs were to use as a phone headset :-) My personal preference are the M1 and M2 over the M4 having owned all of them before. Since the M5 is supposed to sound better than the M1/M2, I can only guess that this will be better than the M4 if you didn't like M4's sound signature. You pay what you get! I own a M5 but it is not impressive enough to say it is a good earphones. For a cheap earphone replacement, it's fine. I read a lot reviews online before my purchase, most of them said M5's sound quality is good and the build quality is better compare with those previous models in the same brand. Yes, they are true, in terms of $30-50 dollars grade standard. About the build quality, don't make the word "better" and copper looks fool you because it still not in a good build quality and the main problem of their earphone is the wire! Another thing I don't really like and most of the reviews didn't mentions are the level of comfort...not comfortable at all. i will recommend