Heil Sound PS-6 - AR Proset Stereo Headset with Phase Reversal w/HC-6 Dynamic...
The Heil Sound Pro Set is a lightweight, versatile headset designed for comfort, durability, and, performance. The -3dB points are fixed at 100 Hz and 12 kHz with a sensitivity of -57 dB at 600 ohms output impedance (centered at 1 kHz.).