Great for HD's!
You will need an external amp to wake them up!!! I first installed them with no extetnal amp on my car and didn't sound any better than the alpines type e i had, only a bit more brighter. I was actually disappointed when I heard them the first time. But then I decided to test them with a class d amp rated at 115 rms to each and WOW... I immediately took them from my car and installed them in my 2015 street glide. Had to modify the speaker pods but trust me when I say it was worth the effort and time! Loud, clean and after a year of hard playing I'm still amazed I haven't blown them. I did an install for my friend 2014 ultra glide using a jl 50x4 amp and four jl's c2 and even he said mine with only 2 is louder than his four. ***P.S. for those that rate mid entry level speakers low you must use an external amp with decent power to perform as intended. If you don't, then, you're better off with the lower entry level stuff designed for low wattage.
Pros: Amped with decent power these will play very loud and clear all day long.
Cons: Have had them for over a year now and no cons