i use this link
http://ledcalc.com/ supply voltage:i did the direct contacts in the speaker so i'm supposing 3.6v..
5v if i use lm386...is this correct
voltage drop across led: 3.3(blue)
desired led current: 20mA...is this correct
how many leds: 12
18 ohms is what comes out...
just need your opinion guys if i'm heading on the right track...