These were delivered to me yesterday. They sound almost the same as the T20V2 with a little tilt in tonal balance towards the bottom end. Kinda makes my bid of $80 dollars for the vintage T20 a bit silly, when the new T50s cost the same. Heck they look almost the same. I have not modded these yet but will do so. Whatever limitations in sound that these has (a lot) is entirely cup related and not driver related. Comparing these to the LCD2 would be like comparing PX100 to HD800. Yes I still stand by what I said about the T20V2 and it applies to the T50RP as well - these drivers are technically more proficient than the K701/HD650 drivers - they are indeed turbo drivers, though its hard to tell with all the cup coloration occurring (strangling the sound in in every possible way - especially the top end and imaging and staging).
I think almost everybody in audio period is confusing the definition of driver speed. Driver speed has very little to do with staging, imaging and treble response.
To illustrate this point I will use a drum ride cymbal as an example. When one taps a cymbal with the hard plastic tip of the stick against the surface of the cymbal (hence you "ride" the cymbal) the sound that comes out is a very crisp "Ding" sound with the emphasis on the "D" part. On every headphone below the HD800/LCD2/D7000/T1 level (that I have heard) - this sound becomes less of a "Ding" and becomes more like a "TZing" with the "D" part coming out like a "TZ" sound. This is because the driver is not quick enough to render the hard leading edge and softening it - hence the resultant change in sound. This is my benchmark as a drummer to asses treble transients - I find treble transients are less affected by cup resonance as lower mid and bass transients, transients in those frequencies can be "psycho acoustically" masked by cup resonances - for which the T50 suffers terribly from, but with a little experience - it is possible to filter out the cup resonance sounds in your mind and and hear the true driver speed - or just judge the "Ding" in a ride cymbal.
The good news is that on the T50RP the ride cymbal does sound like a "Ding" and not a "TZing" - though it is muted amongst the cup resonances. If one is willing to put the effort into some simple cup mods as shown by Leeperry - I have no doubt these cans will surpass the HD650/K701 many ways, with driver speed superiority granted with no mods. The fact that there is zero hint of "grain" in these cans hint at superior driver speed, because if one listens carefully enough the HD650 and K701 contains a trace of grain in the upper registers that is non existent in the T50s - and grain is not cup resonance relate. Lack of grain (superior midrange smoothness) is a result of superior raw driver speed.
Edited by SP Wild - 10/6/10 at 8:45am