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Post by c61746961 on Jan 31, 2014 18:03:25 GMT
I see, now I wanna get a hold of another pair to listen to stock ; >>
Edit: Wouldn't it be lovely to have K550-level performance in the A51 enclosure?
Also, agreed, Frans' work is top-notch and not guarded in secrecy, which is the biggest plus.
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Rabbit
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Post by Rabbit on Jan 31, 2014 20:04:44 GMT
I do like the AE51 as well. It doesn't have great extension in either treble or bass, but it is nice and balanced sounding, although the bass has a hump there as well. From my descrition it sounds terribly flawed but on the head, it's pleasant. A K550 sound in that enclosure would indeed, be rather nice. Especially how my K550 sounds now!!
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Rabbit
Administrator
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Post by Rabbit on Feb 2, 2014 22:19:14 GMT
Frans, I think Portapro must have changed the bags as well as the packaging if my Portapro is real. My bag has the word 'Koss' emossed on it with it boxed up with an embossed rectangle. The one that you sent to me has 'Koss' with no rectangle around it and the material has a texture. Mine is plain. The letterng of Koss on the one you sent is much more defined, so either they've changed the packaging, including the bag or mine is a very good fake!!
If mine is a fake, maybe that's why I don't like the Kramer mod?
Maybe Koss have changed it in order to make life difficult for the forgers?
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solderdude
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measureutternutter
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Post by solderdude on Feb 2, 2014 22:47:47 GMT
I am 100% sure both are real ones. Everything suggests both are real.
The shape of the holes in the inner ring, the impedance, the lettering quality on the headphones, the color/texture of the pads, the measurements all check out as real on both of them.
Myself I prefer the KSC75 over the PortaPro as it is a bit brighter sounding due to the titanium flashed coating.
The bags have been changed by Koss, probably also to make sure fakes are easily discovered.
The fact that fakes cannot be found on fleabay any more tells me Koss was not amused and took serious countermeasures in legal form and by changing things AROUND the headphones as the bag, packaging, lack of adapter, different plug appear to have changed but the PortaPro itself sounds and measures the same. The sound of the fakes seems to be quite different, not marginally different. They are reported to sound really crappy.
The Kramer mod actually lowers the amount of highs and that's what you hear. Before the mod they sounded exactly the same and very similar to my KSC35.
To complete the Kramer mod the pads need to be changed (made of thicker form) or slip some foam underneath the pads of the Kramer modded one. This should decrease the bass and lower mids and relatively lift the highs.
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