first of all, you wanna strip the speakers naked first. to do this, pry along the area.

and then continue to unscrew the visible screws in there. should be no problem at all.

these will be the internals of the speakers

that little circuit beside it is indeed the amp circuit for the speakers. that means you dont need to buld one from scratch like the soundmod. moreover, it uses 3.6V, just like the psp. it eases the process as you dont need to do any calculations to make it work.
after disassembly, desolder the wires that goes to the phone jack. (that part where you stick into the cellphone. )

a closer look at the circuit.

the points from left to right:
+, -, C, L, R, RA
note the C and RA? well, me and the guys at acidmods failed to register the use of it. so we concluded its a Sony Ericsson exclusive point. no need to solder them.

the + should be the +3.6V and is the power in for the amp. the - is the ground. L and R are obviously the input for the amp.
the L+, L- and R+, L- are the pins for the speaker output. cut off the wire from the speakers. it eases the fitting.

now, that should clear the speaker part. moving on to the psp part.

dissassemble the psp, this guide might help: PSP Slim Dissassebly Guide.
please make sure you've read and fully understood the process. a wandering mind can really screw things up.

in order to give way to the speakers, the umd reader have to be taken out. i dont think it will be much problem as you guys must've tons of .iso games.
also, holes must be drilled on the umd door to locate the speakers.

the amp will be placed under the d-pad, at the left side of the backplate. there is ample space under the mem stick reader, and coincidentally, the amp doesnt bother the mem stick reader at all. just enough space.

cut off the minor supports in that area.
drill a hole on the wall beside it to route the wires to the speaker outside. this should do the trick

take the headphone jack fom the psp, and short the pin 3 and 4. shorting them tricks the psp that there is a headphone jacked in. you can add a switch there to enable on/off functions. but too bad i got none now.
the 1 pin is the Left input, and the 2 pin is the Right input. solder them to the L and R pins on the speaker amp.


connect the + pin on the amp to the battery connector on the psp motherboard.
make sure you solder it to the lower pin on the right connector. *make sure u dont over use the solder and cause it to touch the other tiny components. that'll be bad*


connect the - pin on the amp to a ground point on the motherboard. now, there are a few ground points on the motherboard also the headphone jack board. but in this case, i soldered them to the motherboard's ground point, easier.



after all that had done, place them orderly in the space we've cleared.
a pict might help.

remember to insulate the exposed circuit from the mem stick cage. they might short out. for low voltage electronics like this, a simple masking tape is enough. but for safe, use an insulating tape.


note how clean the wires are?. it may take some time for you to tidy up. but trust me, its worth it.

run the speaker wires out the hole in the wall we made earlier to the umd slot, and solder the speakers respectively to their connectors.