You might think, why do i need a volume limiter ? well you should consider that on the long term listening to loud music, especially on earphones can lead to permanent hearing loss. Some of the more expensive mp3 players available on the market have built in volume limiter’s but most of them don’t include this option. So here is what you can with a couple of resistors inserted in series with the headphones. You can get full info on project by following the link below.
Volume Limiter Circuit: [Link]