JohnYang1997
100+ Head-Fier
To those who don't know about hf5 and er4, they use the "same" driver but by two different manufacturers. sonion 2389 is essentially knowles (2)9689. Slightly different in the fr. Thus to me. hf5 + PtoS adaptor ~ er4s.
Same thing may apply to er3. Etymotic being a "big" company means that they are able to customize ba driver. New er4's have customized drivers that you are not able to buy retail like you do with 29689/2389. So it's "safe" to etymotic.
Which also means that even if you crack er3/4 open, you won't find anything meaningful.
My word is, if you love etymotic and want to support etymotic, go buy er4sr + xr + mk5 and probably er1 and 2 lol.
If you want to have the most of your money and have the most of your er3, try adding 20-100ohm resistor to er3 and profit.
Same thing may apply to er3. Etymotic being a "big" company means that they are able to customize ba driver. New er4's have customized drivers that you are not able to buy retail like you do with 29689/2389. So it's "safe" to etymotic.
Which also means that even if you crack er3/4 open, you won't find anything meaningful.
My word is, if you love etymotic and want to support etymotic, go buy er4sr + xr + mk5 and probably er1 and 2 lol.
If you want to have the most of your money and have the most of your er3, try adding 20-100ohm resistor to er3 and profit.