I enjoyed the hd58x and 598 /599 though, I think it’s mainly that the 660 didn’t feel as impressive for their price bracket versus its siblings. I also tried the 660s right after the focal clears so it wasn’t the fairest first Iimpressions haha.
the main key points to me for the 560 seem to be the senn signature mids but with a better soundstage and extension, plus the price point
U get me a little bit confused there .... U said that thinking about buing HD650,HD600,HD6XX but u tried HD 660s and didnt like them.
There is a difference on how good a headphone sounds and how good value for money a headphone is . HD 6XX and HD 58XX are amazing value for money headphones only in US and not in Europe , for example to me HD 6XX cost me 300 euros vats and taxes to come and waited 2 months , the spider cage was broken also and i had to send them back to US no warannty from SENNHEISER EUROPE .
At the same time HD 600 cost 310 HD 650 cost 340 and HD 660S cost 380 euros So if u consider warranty time waiting etch etch I dont see any Value for money for people outside of Drops cyrcle ...
About sound again... All HD 600 650 6XX 660S have close sound characteristic's Its not something like Beyer sound or BW sound or Focal sound differences even HD 5 series have different sound compered to HD 6 series .... U get a little bit confused because you read People saying that HD 600 are more neutral HD 650 more smooth and HD 660s are more tight better dynamics and thats true BUT the differences are not more than 5-10 % and u can hear them ONLY if u have these Headphones everyday like me and listen them side by side .
So yeah If u Didnt like the sound of HD 660s then u gone not like HD 6 series sound signature ... Saying that U enjoy HD 58X and u didnt enjoy HD 660s sound also doesnt make sense to me because they have the same Character but HD 660s are tighter more refined better imaging they beahave better on distortion etch etch .. So if u really like HD 58X there is no way u didnt like HD 660s .
HD 599 on the other hand they sound for sure different compared to HD 6 series .
Anyway at the end of the day ... U should first decide do you want HD 58X and HD 6 series type of sound ? or HD 599 that are different ? And if u want HD 6 series sound how much do they cost for you ... if for example u can get HD 6XX for 200 vs 400 that HD 660s cost and u dont care about this extra clarity dynamics etch etch ( some people prefer HD 650 smoothness what ever the price) Me ? i use HD 650 for old recordings that i want smoothness and HD 660s for anything else.