this is a revision of an old instructable I did a while back showing you how to make a clip indicator for a speaker. this one has less blowing led's
Step 1: Parts
one large or medium size capacitor
Step 2: Soldier the Led to the Capacitor
take the negative side of the led and soldier it to the positive side of the capacitor
Step 3: Connect It to the Speaker (if the Speaker Is Already Set Up)
set your speaker up and connect the open pin of the capacitor to the ground terminal of your speaker
Step 4: Connect the Other Side of the Led
leave the positive side of the led unresisted and soldier it to the positive side of the speaker
Step 5: Test It!
see if it worked, it should.