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iBasso just keep doing stuff right don't they?
Well, so far they know how to impress.
I have RHA ma750 more than three years.
Is the sound quality is better?
Is it worth the upgrade or the sound quality is the same?
It may depend on how much of an upgrade you're looking for.
May not be a major upgrade, but the IT01 is better in some aspects. Both share a lively signature, but the IT01 is less v-shaped. Midrange is more forward, especially the vocals. Speed is higher too. Smoother treble and more controlled, while the MA750 can be sharper. iBasso has more clarity and it's more effortless.
Both have a similar mid-bass lift.
It may depend on your source too.