Any 1/4" to 1/8" converters/adapters and vice versa?

[Xpred]

I'm looking for a 1/4" to 1/8" and a 1/8" to 1/4" type of adapter/converter plug so I can plug my headphones & speakers in/out/from several sources. Anyone know of any good ones that don't lose quality of sound as much?

 

[TimOBrien]

As long as you stay away from the 59cent specials at the Dollar Store, you can just go to Radio Shack and everything'll be fine....