The build quality of the Spark headphones is impressive for the price. The earbuds are constructed of aluminum and resemble a sparkplug. They are extremely lightweight and feel solid in your hand. The splitter and the audio plug are metallic but ID America chose to make the in-line microphone out of plastic. This is one gripe I have about the build quality as this is something that should be metallic and should be upgraded with a 3 button mic instead of the 1 button design.
So you're wondering how they sound? Overall, for the value, i'd say they are okay. I wasn't overly impressed yet I wasn't disappointed. The Spark headphones are bass heavy with a solid but smooth punch. The mids are adequate and are not completely overpowered. The treble is lacking and doesn't present a smooth sound. The extension is mediocre and is apparent in the high registers. Overall though, treble is crisp and the sound isn't too bad.
I've used comparable Klipsch s4's and in my opinion, the Klipsch product takes the edge over these albeit slightly more expensive. For a relatively basic, dynamic and bass heavy headphone, you can't go wrong with the ID America Spark at $59.95. They come in 9 different color combinations and are available via the ID America website.