Originally Posted by gordec
Is the impedance really an issue? I figured Venturecraft built this with mobile listening in mind so IEMs should all work well. Sometimes I don't know if you really need to read into the specs that much.
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Even with 47Ω output impedance, X is working fine. From my experience with TG334, W4R, and TF10, I notice some change in sound signature when paring X with all of them. At first, I think that it's because of OpAmp characteristic. TG334 and W4R's bass are suppressed a little (more on W4R) while high are more pronounced. On TF 10, I got the opposite. I learn that output impedance will effect the FR of multiple BA iem, so I suspect that my X is doing that to me. I plan to upgrade OpAmp for my X and ask VentureCraft to change output impedance at the same time. With the new 10Ω output impedance, I get the sound signature of those iem closer to the one right out of my ipod with more clarity and details.
Originally Posted by 10DeeQ
whats the headphone impedance upgrade for ?
i have go-Dap 4.0 not X but i thought the internal are quite similar
my go dap is still at venture craft for firmware upgrade
do i nned to ask them to upgrade the headphone impedance too ?
i only use them with my audio technica ATH CM7Ti and V-moda M-100
if i need to upgrade that i might as well ask them for it since the go-dap is still with them right now, thank you.
It's not an upgrade. You can say that it's customized to personal preferences. High output impedance is used to protect the circuit of the X but it also change the FR of your iem a little bit.