Exactly. But if you take a trip to their respective threads (v6 or k550) there is always someone that likes really bright or analytical stuff and dares to use the term laidback wich can be conpletely misleading.
The 1a from what ive read its the 1r with the punch it was needed. The 1r missed bass extensions and it did not had much punch. But to be honest i really didnt like them because i thought they sounded muffled and boring.
Yeah the momentums may be called laidback due to the refined and controlled highd ( a la sennheiser) but still they have great punch, clarity and they can also make stuff like metal sound pretty powerfull and engaging.
I would love to try thr 650s and compare with the 600s but unfortunatelly stores here in in portuhal dont have a very good selection of headphones. I could always buy them on amazon and return if i dont like but i dont feel like stalling 350 euros wich at the moment is a massivel amount of money for me....
I have had the HD6XX for a couple weeks now, it is an HD650 in pretty much every detail...except with a shorter cable, I think? And of course the color (which, I'm sorry, in the light of my computer room sure looks black to me).
The 6XX does have noticeable bass extension and volume over HD600, to my ears. It doesn't quite get the deep rumble of X2 or TH-X00, but it's a big step there.
The 6XX is definitely more resolving than X2, and for basically the same price. Unless you absolutely NEED ultra-wide soundstage, such as for gaming, I'd personally choose the 6XX over X2 100% of the time
That's a big deal, as I was a big proponent of X2 for a good while.
I'd still call 6XX laid-back....though a better word may be "unperturbed". It NEVER loses its' composure. I'd say the same for HD600.
However, much the same way as I find my Stax more exciting than my HD600, I find my X00 Purplehearts more exciting than HD6XX. The bass hits even deeper, harder, and faster to my ears...though at a substantial price premium over 6XX.
I'm not sorry I purchased HD6XX, they're a spectacular value for the money. I'm proud to own my Sennheisers and do love them even though they don't get much playtime! But my long-term pairing hasn't changed from Stax + X00.