Originally Posted by Claus-DK
Some in this thread say that 2050 and pro80 shares drivers, the houses are very alike, so what you are doing is transforming pro 80 into 2050, or am I totally wrong here ???
Although that is not what was done, I will claim that if you seal the round vent hole in a pair of HI 2050 you will essentially have a pair of Pro 80 with velour pads. If the seal is done properly I do not see how the mesh vs solid cup should make a difference. The internal felt padding, while not completely identical to the Pro 80, should not make a huge difference in the percieved sound, but who am I to say, I removed the felt entirely when I sprayed the inside with stone chip spray and I haven't looked back.
On the other hand, a fellow member on the danish headphone forum auditioned my modded Pro 80's against un-modded one's of his own (well, they had a re-cable, but that shouldn't account for much difference). He concluded that the difference between the modded and un-modded were very subtle and doubted if he would be able to tell them apart in a "blind test".
For myself, for some reason the un-modded Pro 80 just ended up on a shelf (i preferred the sound of my JVC HA-RX900). After the mod the HA-RX900 went on the shelf and the Pro 80 started getting play time, but that COULD be because of the amount of labour put into the mods of these phones. Another reason could be getting rid of that silly curly stock cable (so maybe the Pro 80's WERE better all along, but the cable pulling my head annoyed me enough to discard them). Another possibility, of course, was that I genuinely preferred the sound of the modded pair of Pro 80 (I have not made a "blind test", but maybe I should see if I could convince myself to spend the time doing just that).