Just fews facts :
- The M5 signature is NOT V Shape at all BUT lot of people will think it is. Why ? Because the bass are truly at TOTL headphones Level, remind me LCD 4 (100ohm) and the high are clear and detailed, so clear that you will maybe find your other IEMS sounding dark beside the M5. The mids are there, how yeah, and you can feel it clearly. Voices are exquisit !
- With the black Atom-x module (for me the best), the sound is big with a limitless dynamic as far as they never never saturated even at loud volume.
- They can be chameleon sometimes. When I listen classical or baroque, they are incredibly delicate, but if I switch to West Cost Hip Hop suddently they will sound massive. That's extraordinary.
By the way, if you are a Classical / Baroque guy, definitely, you should definitely put them on the top list even they are excellent with all genres.
- Last things : They are easy to drive but appreciate power. They are NOT forgiving. If the mix is great, then you'll be amazed, if the mix is poor, then you want to change the track. You'll fell the "time/age" of the record. If it's old you'll feel it. And and and : as far as they are only 6.8 ohm they support extremely well EQ and you can even add highs to have an even clearear / airyer sound.