Headphones - Mini stereo

RE: NW- Copy #1 - Copy #19 only: Exponent brand headphone; RE: NW-Copy #1 to Copy #19 (Exponent brand headphone) only: 3.5 mm stereo plug; Cord length 2 m; Frequency response: 20 - 22,000 Hz; Impedance: 32 ohms, Max power input 100 mw; Sensitivity: 105db +/- 2db @1Khz; RE: NW-Copy #20 to Copy #29 only: Koss brand headphone; RE: NW-Copy #20 to Copy #29: Koss brand headphone only: 3.5 mm stereo plug; Cord length 1.2 m; Frequency response: 80 - 18,000 Hz; Impedance: 32 ohms, 91 db SPL; RE: NW-Copy #30 to Copy #46: Cyber Acoustics ACM-70b headphone: 3.5 mm stereo plug; Cord length 7 ft; Frequency response: 20 - 20,000 Hz; stereo; RE: NW-Copy #47 to Copy #54: Koss UR20 headphone only: 3.5 mm stereo plug; Cord length 8 ft; Frequency response: 30 - 20,000 Hz; stereo. Full size, flexible, closed cushions; RE: CO-Copy #15 & Copy #16: Koss UR20 headphone only: 3.5 mm stereo plug; Cord length 8 ft; Frequency response: 30 - 20,000 Hz; stereo. Full size, flexible, closed cushions; RE: NW Copies 52-61 : Sony ZX110