I've got a cheap chinese lightsaber and want to make some adjustments to it. The item looks great but its volume is too loud and my neighbours get mad when I switch it on. It doesn't have any way to control it. I contacted the seller and confirmed that there was no internal control.
I'm not an expert in electronics, I only know basic teoric concepts and how to use a soldering gun. My first idea was to install a potentiometer between the control board and the speaker, because there is some space behind the speaker, but after I searched this site I discovered it was a bad idea, that the sound will be distorted, the amplifier could break and there would be unnecessary power consumption in the resistance. At least that is what I understood.
I've tried to locate the amplifier, but it doesn't seem easy to make mods to the PCB, as it is really small and it fits in the hilt without much free space.
So the question is, considering that controlling the volume at the amplifier input is not an easy option, and that the system itselt is not a Hi-Fi and small distortions could be accepted, will installing a potentiomenter be dangerous and break the amplifier? What about a voltage divider?
If the risk is too high, could I simply take the speaker off? Altghough I think it can sound silly asking this, I read in another question that it could break the amplifier too, due to infinite resistance. I really don't know if that responses only related to guitar amplifiers or if it applies to small ones.
The speaker specs are
8 Ohm 2 W,
20 mm in diameter, while the battery is
3.7 V 2000 mAh.
The cables on the left down corner of the PCB go to the speaker; the right side ones go to the leds. I cannot extract the PCB more than that without cutting any cable, I hope this helps.
Thank you in advance.