k750i r1db001 makes low quality sound

[csart]

you can just flash the phone to another fw version, i think ribc002 is a good fw, stable and its still got the megabass feature. if it you dont want that you can just play around with the manual equalizer until you get the right sound

[djape48]

i have w700 with r1db001 and megabass works fine (there is more bass then i actually need). when phone speaker is turned on, you can't really notice the difference, only when using headset