Coming up for 60 hours burn in the bass has certainly calmed down a lot. In well recorded bass light music such as folk the headphones don't sound too bad BUT as soon as you listen to anything that is mastered quite hot or has more bass than 'usual' it becomes clear how exaggerated, invasive and messy the low end is.
Im just baffled. When they say they have in essence emulated the HD250 ?? What are they talking about ??
Personally, from what I have seen of Sennheiser in recent years I don't trust the company to ever again produce another classic such as the 250 or the 540. On the one hand they have the HD 800S for the ridiculous price of $1500+ They are not worth half that. TECHNICALLY they are a great headphone but compared to the HD 540....
On the other hand the Manager said they are focusing on headphones for the mp3 phone using generation. Fair enough they need to make money but I just dont think they are interested or have the skill anymore to make a headphone that accurately presents music as natural to real life as the HD 540 for example.
I think, when they say 'we have tuned the 300 almost exactly like the 250' and from what I have seen of the factory, that they have tuned and measured mainly using computers.
There were some engineers in the mid 80's to the mid 90's who produced in a short time some of the worlds best headphones - AKG 240 Sextett, Beyerdynamic 880, Sennhieser HD 540 & HD 250. A special time. Maybe because it was the peak of analog technology before digital took over and that those engineers ONLY had their ears to tune with.
Anyway, still burning in... They do seem likely a potential for some modding?
Also, I must add the packaging was pathetic, like they really didn't care. Shoved in a cardboard box, no accessories, just a leaflet. £170 is not a small amount
IF they REALLY thought they had produced a modern HD 250...one of the best closed backs ever made

then the packaging says a very different story