From what I read so far, it seems like they are on par in sound quality overall with each having its strengths and weaknesses. The 121 is better for analytical listeners, has a more balanced frequency response and better mids. PFE232 has a more fun response, bigger bass for bass lovers and a smoother treble at the expense of midrange presence. My conclusion based on what I read is that PFE232 is not worth anywhere near the price, but then again I think single driver PFE is better sounding than any multi driver IEM I tried so far overall and so I wouldn't mind paying upwards of $500 or even more for it considering how many inferior sounding IEMs are selling for a lot more money than the Phonaks.























Thanks for the post


