
HFI-15G – Moving on… 
Due to its small size and its low weight, the HFI-15G may be used especially for mobile applications (Walkman™, MP3-Player). With no other small headphone, the sound is being reproduced as naturally and as convincing. 
Technical data ULTRASONE HFI-15G: 
– Open, supra-aural headphone 
– S-Logic Natural Surround Sound System 
– Reduced magnetic field emission (LE or PROline version) 
– Safe hearing protection 
– Dynamic principle 
– Frequency range 20 Hz – 20,000 Hz 
– Impedance 32 ohms 
– Sound pressure level 90 dB 
– Weight (without cord) LE 85 g, PRoline 110 g, 3,5/6,3 mm gold-plated plug 
– Long-term availability of replacement parts 
– German Technology