Koss

SHURE

QZ900

SRH1440

Wired Headphone Specification

Wired Headphone Specification

Over Ear

Over Ear

Neodymium

Dynamic, Neodymium

NA

40 mm

32 Ohms

37 ohm

100 dB/mW

101 dB/mW

20 Hz - 20000 Hz

15 Hz - 27000 Hz

NA

1000 mW

Yes

CVC

Black

Black

3.5 mm Gold Plated Jack

3.5 mm Gold Plated Stereo Plug

1.2 m

Tangle Resistant Cable

NA

343 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

Individually tested and serialized.
Open back circumaural design promotes natural audio response.
Legendary Shure durability withstands the rigors of everyday use.
Impedance optimised for connectivity to most portable audio devices.
Replaceable velour ear pads with high density, slow recovery foam for exceptional comfort.
Open-back, circumaural design for exceptionally natural sound, wide stereo image, and increased depth of field.
Fully adjustable, premium padded headband with steel frame and sleek, ergonomic design for hours of listening comfort.
Additional oxygen-free copper cable and zippered storage case provide years of listening enjoyment and convenient storage.
Dual-exit cables with gold-plated MMCX connectors provide secure connection and detachability for easy storage or replacement.