IDK but one of my boys was across the room from me (about a 20') I could still hear his headphone thumping over my JBL ones.
So yeah I would say they are good.
Alil too loud if you ask me.
Make sure you get it from a good place though because I hear so many different stories about people getting cond into buying a fake one that looks almost real.
Oh' and I have the beats pill speaker. It is very nice, portable, great sound from any device I connect to via cable or Bluetooth. I had a Sound blade speaker and it was trash compared to my beats pill, which also uses NFC to turn on Bluetooth connections (both my phone and tablet connect that way.)
I listen to stuff like Rob Zombie, Stone Sour, Def Tones, Chevelle, Clan of Xymox, The Cure, Vivaldi all of them and lots more, no breakup or tinniness or distortion. Charges full pretty fast. Runs on battery or plugged in. Nice carrying case. Oh, and all the beats have Monster Cables.
you had to mention "monster cable",another overpriced gimmick...
just like people i have seen that use big fat 50 dollar MC for a 100 watt speaker lol...then i show them you get the exact same performance from a piece of 1.50 telephone wire...the higher the watts the more strands of fine wire are needed and it don't matter who it comes from...copper is copper and no one copper is better than another...