<![CDATA[ChipMusic.org - GBA line output mod?]]> 2011-06-11T20:57:03Z PunBB https://chipmusic.org/forums/topic/4307/gba-line-output-mod/ <![CDATA[Re: GBA line output mod?]]> Alley Beach wrote:
wedanced wrote:

according to this, pin 13 and 15 are the out. so we can jump that to the pot, kill the old traces, and then from post pot go to the jack, correct?

you would want to jump from the in not the out. The amp component is what adjusts the signal for headphones making it more loud and clear for other outputs tho.

Trash 80 made the first plans for the gbc prosound mod. It accomplishes this by going around the noisy amp chip and going straight out. all other prosound mods work the same way. by bypassing the amp it keeps the impedance of the signal at a level that is more suitable for instrument outputs which gives it a volume boost (als drops headphone signals).


what you can do is take from the 7 and 8 pins cut the 13 and 15 and send straight to the pot for an prosound without a added jack.

]]> https://chipmusic.org/wedanced 2011-06-11T20:57:03Z https://chipmusic.org/forums/post/70070/#p70070 <![CDATA[Re: GBA line output mod?]]> Alley Beach wrote:
wedanced wrote:

according to this, pin 13 and 15 are the out. so we can jump that to the pot, kill the old traces, and then from post pot go to the jack, correct?

those resistors are pre-amp, like wedanced suggested. So, the amp will take the broken resistor sound output, which sound awfull. we need a pre-resistor sound output, if such thing exists.

]]> https://chipmusic.org/Analog 2011-06-11T19:36:04Z https://chipmusic.org/forums/post/70068/#p70068 <![CDATA[Re: GBA line output mod?]]> wedanced wrote:

according to this, pin 13 and 15 are the out. so we can jump that to the pot, kill the old traces, and then from post pot go to the jack, correct?

]]> https://chipmusic.org/Alley+Beach 2011-06-11T17:35:36Z https://chipmusic.org/forums/post/70063/#p70063 <![CDATA[Re: GBA line output mod?]]> ill do it as soon as i get an gba. why not just solder straight from the amp?

]]> https://chipmusic.org/Alley+Beach 2011-06-11T17:32:08Z https://chipmusic.org/forums/post/70062/#p70062 <![CDATA[Re: GBA line output mod?]]> Will check it out when I get back home.

]]> https://chipmusic.org/wedanced 2011-06-11T07:47:18Z https://chipmusic.org/forums/post/70039/#p70039 <![CDATA[Re: GBA line output mod?]]> is no other place to take out the sound output?

]]> https://chipmusic.org/Analog 2011-06-10T22:23:30Z https://chipmusic.org/forums/post/70022/#p70022 <![CDATA[Re: GBA line output mod?]]> Lol. Well fuck. I think it is safe to say this mod is for surgeon. Sorry guys.

]]> https://chipmusic.org/wedanced 2011-06-10T21:33:48Z https://chipmusic.org/forums/post/70021/#p70021 <![CDATA[Re: GBA line output mod?]]> I'll buy all your broken GBAs big_smile

]]> https://chipmusic.org/Apeshit 2011-06-10T21:01:15Z https://chipmusic.org/forums/post/70017/#p70017 <![CDATA[Re: GBA line output mod?]]> Guess who failed too? haha,  I got too frustrated and ended up swiping off the resistors and just trying to solder on the pads... which I couldn't do.  So aside from missing those resistors my mobo is okay.  I don't know,  I might try working on it later.  Too small!

]]> https://chipmusic.org/Theta_Frost 2011-06-10T20:35:27Z https://chipmusic.org/forums/post/70013/#p70013 <![CDATA[Re: GBA line output mod?]]> any success theta frost?

]]> https://chipmusic.org/wedanced 2011-06-08T22:10:21Z https://chipmusic.org/forums/post/69843/#p69843 <![CDATA[Re: GBA line output mod?]]> those resistors are very small,... i've succesfully killed both on my gba's PCB. FAIL.

]]> https://chipmusic.org/Analog 2011-06-07T05:01:08Z https://chipmusic.org/forums/post/69576/#p69576 <![CDATA[Re: GBA line output mod?]]> So... I failed because of my hands.... It's up to u guys sad
It's a shame that I can figure out how to do mods now but I am no longer able to execute them...
Can't tell u how bummed that makes me.

]]> https://chipmusic.org/wedanced 2011-06-07T04:22:01Z https://chipmusic.org/forums/post/69575/#p69575 <![CDATA[Re: GBA line output mod?]]> I have a clear pink GBA kicking around.  If I have any time outside of finals this week I could solder that up.  Don't have any 2.x to give good sound comparisons though.  If there is interest I could take pics and make a mini tut-ish.

]]> https://chipmusic.org/Theta_Frost 2011-06-06T22:03:47Z https://chipmusic.org/forums/post/69544/#p69544 <![CDATA[Re: GBA line output mod?]]> Let us know how it goes. Waiting on a new gba in the mail. Gonna try to do it and I will post my results with sound comparisons and what not. We will see how this goes.

]]> https://chipmusic.org/wedanced 2011-06-06T21:57:36Z https://chipmusic.org/forums/post/69542/#p69542 <![CDATA[Re: GBA line output mod?]]> thanks a lot wedanced, i'm going yo give it a try, and see how it behaves...

]]> https://chipmusic.org/Analog 2011-06-05T22:36:17Z https://chipmusic.org/forums/post/69469/#p69469