For what it's worth, I've had two pair of the Pulsars (RCAs) for a little over two months and struggled a bit early on with the top end as well. I don't have a cable burner so I just left the ICs on the system using tuner or XLO burn-in disk (putting the amp in standby when I did).
For me, it took well past 200 hours for the top-end to settle in. But once they did, WOW - they are truely exceptional! Clean, balanced, neutral from top to bottom! I find the music just more engaging. Do they do a better job of PRAT or are they just getting out of the way and letting the equipment do it's best? Beats me but whatever they do, it's definitely working for me! I'm keeping them and now burning in one of Chris's Flavor 4 PCs.
For me, it took well past 200 hours for the top-end to settle in. But once they did, WOW - they are truely exceptional! Clean, balanced, neutral from top to bottom! I find the music just more engaging. Do they do a better job of PRAT or are they just getting out of the way and letting the equipment do it's best? Beats me but whatever they do, it's definitely working for me! I'm keeping them and now burning in one of Chris's Flavor 4 PCs.