Anybody heard of Sony MDR-CD555?

Hi,
just found those in a thrift store. I had a quick listen with my cmoy - bass not to boomy, and they do have some soundstage. After listening ten seconds, I was convinced that they were worth the price.

Now at home - compared to the Sennheiser HD497, they sound a lot more emotional. HD497s are quite dull and boring in comparison. But the CD555 are a tad less precise and resolving.

Compared to the SR80 - well, the SR80 clearly has the best features of both, plus the very detailed highs. But for the price, you really can't complain.

They seem to be half-closed... they have a slit in the back where sound leaks out. And according to the cord length, they don't seem to be made for portable use. They have a 3.5mm plug with a thread for a 6.35mm adaptor. So, looks like they were made for home listening and/or studio use.

Has anybody some info on these? Couldn't really find anything here on the forums, nor elsewhere on the internet. When were they made, what are the technical specs, what was the intended use etc...

Here's a pic. As it seems, this headphone is something like the Sony MDR-V6 and the MDR-7506. Well, only question is, what is this "something" exactly?

I listened some more to it, and I really like it! On the bus ride home, it managed to tone down high frequency noises a bit - the bus engine was turned into a low growling instead of a wideband noise. Soundwise, it really comes close to the SR80. It seems to even have a more 'fun' characteristic, at the cost of some refinement and a bit unpreciser soundstage. Considering that I paid 20 times less for it than for my grados, this is indeed very good.

P.S.: I'm a bit afraid of listening vinyl with it. It states "for digital". Maybe it explodes if I connect it to a turntable

9 swiss francs - about 7.20$

sorry nsjong, but I don't understand your post

Just did a resistance measurement this morning. The Grados, as expected, have 32ohm @0hz. the cd555 have 44ohm @0hz.. strange.. The 7506 seems to have 64ohm impedance, and I thought that I read somewhere that the v6 has only 24 ohm impedance. Is there a different driver in the cd555, or do they have such a wildly varying impedance over the frequency spectrum?

bump... anyone got some tiny bit of info about these cans?

thanks serge.
south africa?
I wonder how it came to switzerland, and I also wonder how much it is based on the mdr-v6, because at DC it got 40 ohms impedance