speaker leds help!

[COD3-BRKR]

I have these speakers that you can hook up to anything that has a headphone jack.
Prob: I want sound reactive leds ,but when i solder them it does nothing.
Is there anything im doing wrong ?
(not a newb)

[driftking99]

hey, i did a project similar to that. it works off a 9v with 9 leds 3 rows of 3 parallel leds. and a female jack for headphones and male jack for ipod/mp3. heres a diagram for just male jack running off a 12v. il post up a schematic for the one i did aswell later.
http://hacknmod.com/hack/led-light-box-thumps-to-your-music/

[Modded Matt]

you need to determine what power supply is being provided to the speaker. you may be over/under powering the led which is why it wont light

[COD3-BRKR]

thanks guys i though it was impossible or somthing.
i will try it now.