Koss

Sony

QZ900

MDR-1AM2

Wired Headphone Specification

Wired Headphone Specification

Over Ear

Over Ear

Neodymium

Neodymium

NA

40 mm

32 Ohms

16 ohm

100 dB/mW

98 dB/mW

20 Hz - 20000 Hz

3 Hz - 100000 Hz

NA

1,500 mW

Yes

NA

Black

Black

3.5 mm Gold Plated Jack

3.5 mm Silver-Coated OFC Strands, L Gold-Plated

1.2 m

Tangle-Free Cable

NA

187 Gm

- Revolutionary Active Noise Reduction (ANR) headphone system reduces harmful and annoying low frequency sounds in noisy environments
- Closed leatherette ear cushion for added passive noise reduction
- Cord unplugs to enjoy passive and active noise cancellation wirelessly
- Straight single-entry 4 foot cord with in-line volume control
- Fold flat for portability; carrying case included
- Covered under the Koss Stereophones Limited Lifetime Warranty

Swivel ear cups for portability.
Swivel design makes travel easy.
Silver-coated oxygen-free copper.
High-Resolution Audio compatible.
Patterned grill for smooth ultra-highs.
Heavy bass with Beat Response Control.
Enfolding closed-back design seals in sound.
Pressure-relieving earpads for total comfort.
Super-lightweight design for hours of comfort.
Smartphone compatible with in-line remote mic.
Supplied balanced-connection headphone cable.
Silver-Coated OFC Strands, L-shaped Gold-Plated.
Wide frequency response for a full range of sound.
Responsive Liquid Crystal Polymer driver for clarity.
Aluminum-coated LCP diaphragm for more precision.
Enjoy music as the artist intended with High-Resolution Audio.