How come the left earphone doessn't sound as loud as the right earphone?
right--main music/beat left--base chorus. For iphone/pod/touch, you can change this in a setting called the equalizer
Which is the left and right earphone?
Determine with balance control if they look the same.
How do I fix the right speaker on an earphone?
You don't. Be gentler with your next pair.
Why is it always the left earphone/speaker that goes out?
because its not right:)