For what i have read, the output impedance of the walnut is 100 ohm, so is not suited for this kind of IEM, without some adapter, like an ear buddy or a portable amp with near one/zero ohm on the output.But 2 things. Accessport still sounded better on es3. And walnut v2 sounds bad with es3.
I think that, if i like how the ZS6 respond on mine Fulla 2, maybe i could try to buy a Zishan V2, but not without put my Topping between the KZ and the LO output of the source, for the same problem.
Walnut and Zishan are bargains but designed for demanding headphones.
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