Ultrasone Pro 900i Closed-Back Headphones (Open Box, Missing Packaging) ISONG 2Vrms 20Hz~ 20KHz: attenuation <

2Vrms 20Hz~ 20KHz: attenuation < 0

at 1 kHz) Frequency Response (Microphone) 50 – 4

Due to the lack of stacking space

Dual 3-pin XLR (left and right channel)

Color: Brown

Ultrasone Pro 900i Closed-Back Headphones (Open Box, Missing Packaging) ISONG 2Vrms 20Hz~ 20KHz: attenuation <Ultrasone Pro 900i Pro Quality Sound: Large 40mm titanium plated drivers provide exact sound reproduction. Combined with Ultrasones S Logic Surround Sound Technology, this puts you right into the center of the music. Safer Listening: In addition to providing a realistic sonic experience, the S Logic technology provides the same loudness sensation as other headphones, with an up to 40% lower dB output. This lets you set the volume lower on your music