This thread has inspired me to dig out my Toneking T4 set. My conclusion after a couple of months with them was that the T4 was "good but not great". Turns out I just needed to do more tip rolling and pair it with a better source than what I had available when I first got the T4, I'm enjoying them quite a bit today. I've got them on my ES100 on 2x current mode, and with some very shallow wide bore tips (Tennmak Whirlwind). I'd always used longer, narrower bore tips trying to coax out more bass out of (CP145, KZ Starlines), but I think now I realize I was fighting against the T4's inherent strengths by doing that.
With the wide bores, the clarity/layering of mids and treble improves greatly compared to with the narrow bore tips, and the sound stage seems to open up in all directions as well. Vocals are very detailed and clear, almost feels like studio monitors in that capacity. I just tested out some busy, bright tracks that I noticed have given a bit of trouble to both my Blon BL03 and TFZ No. 3, and the T4 was able to deliver a noticeably greater amount of detail through those passages.
I think I'm naturally inclined to like warmer, bassier signatures than what the T4 delivers, but I'm glad I pulled these out of storage and gave them a new listen, these definitely are a good, analytical contrast to the collection of single DD IEMs that I've been amassing lately. T4 is going back into the rotation, not going right back into the big cardboard box in the back of the closet, high praise indeed
Now the big question is whether I can resist picking up a 9T on 11.11, I have been trying to hold off buying new things until my JVC HA-FDX1 arrives, but well, we all know how that tends to work out.
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