Plan to get Sennheiser IE600 in shop, end up walking away with pre-order 1750 ( order change to 1790 2 day later ) ... it's that darn similarities in sound signature for a lot less price and a better cable !! 
I find IE600 some sibilance on certain notes, 1750 just feel smooth sounding with same tonality. Of course Sennheiser win hands down on the size, but acoustune is not too bad with a more refined iem shape this time.

I find IE600 some sibilance on certain notes, 1750 just feel smooth sounding with same tonality. Of course Sennheiser win hands down on the size, but acoustune is not too bad with a more refined iem shape this time.
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