German company Ultrasone has released the smallest headphone in its HFI line, the HFI-15G. The open-back supra-aural design features a decentralized driver position that is claimed to widen the sound-stage by directing the waves to the outer ear, instead of straight into the ear canal. The company lists a frequency range of 20Hz to 20kHz, with a sound pressure level of 96dB. The 40mm Mylar drivers
