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 went to shop for upgrade from my beloved Westone 4. Didn't bother to get custom. Aiming around $500-1000 options Audition candidates 1. Ultrasone IQ $730 2. AKG K3003 $1,140 3. Sennheiser IE800 $ 660 4. Aurisonics ASG-2 $653 5. Heir Audio IEM 5.0+ $ 690 Here are the mini review of IQ and versus of the other candidates. ...” --darkinners