Spark High Definition In-ear Headphones are the combination of precision acoustics, unique design and expert ergonomic research. Powerful and accurate acoustics are achieved through high performance dynamic driver and special high definition acoustic filter built-in, resulting in full, explosive bass, intense mid-range and clear treble frequency response that will put a smile on your face...
“ I am tired of: throwing away earphones, wasting money, and destroying the environment. Ironbuds promised to be an answer to all three - imho they've cracked it. What is surprising is how good they sound. Been waiting a year for Acoustic Forge to release these. I posted in the forums about 8 months ago about them - but Thomas (the CEO) announced they were having some difficulties...” --intelegant