Koss JR900 Cordless Stereo Headphones

Other products by Koss

Product Details

• Product Dimensions: 13 x 5 x 10 inches ; 1 pounds
• Shipping Weight: 3 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B00001P4XX
• Item model number: JR900
• Average Customer Review: 3.2 out of 5 stars  See all reviews (4 customer reviews)
• Discontinued by manufacturer: Yes
• Date first available at Amazon.com: September 4, 1973

Product Description

Amazon.com Product Description

The Koss JR-900 cordless stereo headphone system consists of a transmitter and a set of 10-ounce headphones with a built-in receiver for cordless listening from almost any audio source, including your stereo, VCR, DVD player, or computer. The transmitter offers a choice of five stereo broadcast channels for optimizing transmission. Using separate channels, you can even use more than one system in the same vicinity.

The JR-900 also comes with a rechargeable built-in nickel-cadmium battery pack capable of powering the headset for approximately 10 continuous hours. The set is covered by Koss's lifetime warranty.

Product Description

Includes RF stereophone, transmitter and AC power adapter; Provides cordless listening from your stereo, video or computer sound source; Transmits through walls or ceilings; Five channel stereo transmitter provides interference-free personal listening; Multiple sound source apability when used with additional transmitters; Closed ear cushion for better bass and isolation; Stereo/Mono switch, power indicator, and volume control; Rechargeable NiCad batteries; Frequency response: 20-20,000 Hz.

Customer Reviews

Most Helpful Customer Reviews

65 of 66 people found the following review helpful:

2.0 out of 5 stars Hiss and break-up, January 10, 2001

By	"mbartosik" (NY United States) - See all my reviews

If you like quiet music or wish to be mobile then these are definitely not for you.

Unless the volume reaches a certain level, then there is just too much hiss. To drown out the hiss you either need to increase the volume sufficiently that you cannot hear anything else in the room (that's not very high since these are closed earphones), or play different music.

Even when you are within 2 meters of the transmitter, moving your head just a couple of inches can result in signal break-up.

If you are prepared to sit still and listen to rock music at the right volume then the sound quality really is quite good. However for over $200 more flexibility is expected both in terms of mobility and clearity.

In mono the hiss goes away, as does the signal breakup (within 10 meters). However, you are paying for stereo headphones.

The batteries don't last long (maybe 4 hours) and to recharge them you must connect a cable between the headphones and the base unit and push a switch on the base. With some other makes you only need sit them on a stand. Also the batteries cannot easily be swapped. So if you want to listen for 6 hours, or you forgot to charge them, you'll just have to wait until they are recharged. You cannot just insert a new battery.

They are a bit on the heavy side.

Something I do like is that there is no tuning dial for the radio signal, so cannot accidently detune them.

52 of 54 people found the following review helpful:

3.0 out of 5 stars Classical listeners will be disappointed, October 18, 2000

By	Karola Moore (Anchorage, AK USA) - See all my reviews (REAL NAME)

Listening to classical CDs throughout the house was my goal in purchasing these cordless headphones. General reception is pretty good, although it does fade in and out somewhat as I move through the house. Most annoying, however, is a constant background hiss, which distracts from the high quality sound I hoped for.

Your satisfaction with this product will probably depend on your listening preferences. Most radios stations and many pop-type CDs would come through just fine. Discriminating lovers of more quiet music will not be satisfied.

9 of 10 people found the following review helpful:

3.0 out of 5 stars Koss Has Balls Asking This Price For These Headphones!, February 15, 2006

By	Todd Currie - See all my reviews (REAL NAME)

Ok lets face it, wireless headphones certainly haven't been perfected yet and any wireless headphones that operate on radio frequency (like these headphones) are going to have some kind of hissing and reception noise but I expected a little more at this price from Koss considering they're suppose to be state of the art in headphones! For Koss to have the balls to ask $300.00 (at Koss.com $400.00) is totally ridiculous! These wireless headphones are no better than wireless headphones that cost anywhere between $50.00 - $100.00. The sound quality is a little better than cheaper wireless headphones but what sinks these is the reception. I don't recommend these for this price, it's a total rip off! The only benefit to owning these is the lifetime warranty.