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Koss QZ-2000 comparison

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Features
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Product name	Koss QZ-2000	Koss PortaPro Headphones	Koss Pro4AA Titanium	Koss Pro3AA Titanium	Sennheiser PXC-300
Price	$134.61 to $137.28	$33.99 to $38.55	$58.99 to $66.49	$43.45 to $43.59	$102.00 to $149.95
CNET editors' rating	3.0 stars Overall score: 6.8 (3.0 stars)	4.0 stars Overall score: 8.3 (4.0 stars)	3.5 stars Overall score: 7.3 (3.5 stars)	3.5 stars Overall score: 7.7 (3.5 stars)	3.5 stars Overall score: 7.7 (3.5 stars)
Average user rating		4.5 stars	3.5 stars	3.0 stars	3.5 stars
Release date		January 01, 1984	May 15, 2003	May 15, 2003
The Bottom Line	For smaller headphones, the QZ-2000s provide impressive noise cancellation and big-bottomed bass.	Koss hit a home run with the PortaPros. Love or hate the design, there's no denying the sound quality here: they're the ideal companion for mobile audiophiles and home theater enthusiasts.	These macho headphones can rock out like pro models.	This affordable model offers the detail and transparency of expensive high-end speakers.	Sennheiser's featherweight noise-canceling headphones are supercomfy and produce sound quality approaching that of some full-size models.
Similar Products	Compare more products	Compare more products	Compare more products	Compare more products	Compare more products
Response Bandwidth	145 - 20000 Hz	15 - 25000 Hz	10 - 25000 Hz	15 - 20000 Hz	8 - 21500 Hz
Localization	English	Info unavailable	English	English	Info unavailable
Headphones Form Factor	Ear-cup	Semi-open	Ear-cup	Ear-cup	Semi-open
Sound Output Mode	Stereo	Stereo	Stereo	Stereo	Stereo
Color	Black	Info unavailable	Info unavailable	Info unavailable	Black Silver
Connectivity Technology	Wired	Wired	Wired	Wired - None	Wired
Headphones Type	Headphones - Binaural	Headphones - Binaural	Headphones - Binaural	Headphones - Binaural	Headphones - Binaural
Active Noise Canceling	Info unavailable	Info unavailable	Info unavailable	Info unavailable	Yes
Product Type	Headphones - Wired	Headphones - Wired	Headphones - Wired	Headphones - Wired - None	Headphones - Wired
Recommended Use	Info unavailable	Portable audio system	Home audio system Professional audio system	Home audio system	Info unavailable
Product Description	Koss QZ 2000 - Headphones	Koss PortaPro Headphones	Koss PRO 4AA - Headphones	Koss PRO 3AA - Headphones	Sennheiser PXC 300 - Headphones
Manufacturer Warranty	Limited lifetime warranty	Limited lifetime warranty	Limited lifetime warranty	Limited lifetime warranty	2 years warranty
Remote Control	None	None	None	Info unavailable	None
Full specifications	Full specifications	Full specifications	Full specifications	Full specifications	Full specifications
Buying choices	Amazon.com $137.28 In stock: Yes Amazon.com Marketplace $134.61 In stock: Yes Prices from 2 CNET Certified stores	Dell Small Business $33.99 In stock: Yes Amazon.com $34.99 In stock: Yes Amazon.com Marketplace $38.55 In stock: Yes Prices from 3 CNET Certified stores	J&R Music and Computer World $58.99 In stock: Yes Amazon.com $60.15 In stock: Yes Amazon.com Marketplace $66.49 In stock: Yes Prices from 3 CNET Certified stores	Amazon.com $43.45 In stock: Yes Amazon.com Marketplace $43.59 In stock: Yes Prices from 2 CNET Certified stores	J&R Music and Computer World $149.95 In stock: Yes Amazon.com $103.00 In stock: Yes Amazon.com Marketplace $102.00 In stock: Yes Prices from 5 CNET Certified stores
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