Want to report that the Sony ZX1 pairs very very well with AKG3003. The DAc in the ZX1 is so detail and bass so clean, it scale up pretty well. To tone the treble down a bit, I bought the new TS500 comply foam for the AKG3003 and ooohhh.. all these combination makes the AKG300 really really good.. It kick up some really good bass, superb clean melodic bass, the foam also add some richness to the vocal. Good thing is, it didn't make the K3003 darker.
One of the complaint in the past, is I find the bass on the k3003 is a little light, but not now. Its still not as much as 1p2 (with comply as well) but is on par with 1p2 (with silicon). When both is on Comply, the 1p2 still came out more on the sub bass, but then the slam is more on the k3003 & much more tuneful. They almost sound the same on the bass now, the only differences is k3003 has a more forward vocal while 1p2 is still a slight U (very slight) & the difference is very noticeable. K3003 still maintains its wide sound stage with Comply
Have anyone try TS500 comply with k3003 yet?
I used them for a long time, but then tried the tx500 and haven't looked back. They are a perfect length and fit my ears well. They sound best to my ears and am happy to keep using them.