So, I got bored wait for a response (on various forums) for boosting audio from the TG-16's EXP. I looked online for a simple amp, when this circuit came up (multiple times) in my search.
Hack A Week - Single NPN preamp
I had parts laying around, so when I had time, I built this thing.
After several minutes of prep and rewiring I got this. (Pardon the shaky cam)
(after uploading the video, I didn't realize how soft the audio on the video was, so you may need to turn up the speakers to hear the difference. No scary things popping out, I promise)
I used two .01µF caps for the video's test. I'm gonna try a 1µF to see if I get a better bass response.
You'll have to build two of these for both left and right audio channels.
You can also eliminate R1 in the schematic. It's not needed in this case.
Just thought I'd share for those needing a sound booster.