The thing is my K750's volume is so low when playing Mp3's like two times lower than normal output. I got this HPM-70 headphone set which also allows me to connect the phone to any earphone but there is no difference in volume. When I connect it to a sterio I have to turn up the volume to full to get a "resonable" output.

I did notice something though, when I connected my phone to a multi-media speaker set and plugged my earphones to ITS output the volume is so amazingly high and blows my ears! And NO quality reduction what so ever! The multi-media speakers amlifier seems to be boosting the output. I'm trying to make something portable out of the circuit but as it needs 9V I'm not sure if it will be exactly "portable" and "affordable".

I heard that this so called "low volume" is due to a law. Never the less is there a way to modify the phones firmware so I can get the volume to "normal" levels on the earphone.

Thanks

Btw, I will need some kind of guide to do the procedure... I'm very new to this and scared of breaking my phone

i think you should read first every pages in here on k750i.

i cant help it cause i got w810i.but definitly some1 will help you so dont get worried

also dont be scared to patch ur phone

use farmanager+sefp or xs 3.0 beta and change your acoustics..use hyper_t,eyeyousee or tvh!these are the best acoustics!