Well i actually have the T300 to,but i have not listened to it very much yet ( been using the T800 nonstop) but i can write a few words atleast.
The tuning is quite different to the 800. Where the 800 is very open sounding in the midrange,the 300 is more closed in and not very spacious. The bass is a bit elevated,but is not a bass head iem. The bass sound like a typica BA bass,dry and pretty fast
i guess it.s pretty good for the Money,but it is not my prefered tuning . It's an easy listen as least.
I feel it's an missed opportunity because there is pretty good drivers in there… But of course YMMV
On a more serious problem,at least for me,is that the stem is extremely narrow. So none of the usual tips you have laying around will fit. so
if you like me Changes tips for fine tuning,well forget about that.
I have worked around that problem for now with the use of tape around the stem to thicken it.But i Think it's a bad idea from Audiosense to build it like this.
If you have a 100 usd burning in you're pocket,use it elsewhere is my advice