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Sony MDRRF970RK 900 MHz Analog RF Wireless Headphone | 
 enlarge | Brand: Sony
Category: CE
List Price: $126.86
Buy Refurbished: $36.99
You Save: $89.87 (71%)
New (7) from $66.69
Avg. Customer Rating:  22 reviews
Color: Black
Media: Electronics
Autographed: No
Memorabilia: No
Batteries Included: Yes
Shipping Weight (lbs): 4
Dimensions (in): 12 x 14 x 10
Legal Disclaimer: Warranty does not cover misuse of product.
MPN: MDRRF970RK
Model: MDRRF970RK
UPC: 027242708242
EAN: 0027242708242
Availability: Usually ships in 1-2 business days
Shipping: Expedited shipping available
Condition: New Sony Warranty included----No shipping to APO's & FPO's ---Shipped in Sony-sealed box with Owner's Manual, Sony accessories, and New Sony Warranty. Buy with confidence-Authorized Sony Dealer since 1990.
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| Features:
| • | 900MHz RF Wireless transmission, FM stereo sound | | • | Induction charging: not direct pin contact for ease | | • | Noise Reduction technology to reduce interference | | • | Neodymium magnets for higher fidelity sound | | • | Charging time approx 16H; Battery up to 14H |
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| Accessories:
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| Editorial Reviews:
Product Description
self-adjusting double headband with built-in auto power on/off sensor * over-the-ear, open earcup design * 900 MHz RF (radio frequency) wireless transmission * switchable noise filter for use when connecting to a TV or VCR * listening range: up to 150 feet * up to 14 hours operation using the supplied NiMH rechargeable battery pack; up to 22 hours with two "AAA" batteries (not included) *
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| Customer Reviews: Read 17 more reviews...
 If you like noise August 22, 2007
30 out of 30 found this review helpful
I was hoping these would work better than the Sennheiser's have used before. Nice looking, rechargeable, inductive charge, auto-off with the headband, comfortable. But.. the noise level is simply intolerable. There is a level of noise at all times which is very intrusive. With music its not really bad, but with dialog(as in a movie) it is truely horrible. With any quiet passage, the noise increases sharply. Some reviewers(of the 960rk) have suggested that increasing the input signal will improve this. Maybe slightly, but the dynamic range of the headphone circuit is very poor, so clipping and distortion come very quickly. Supposedly there is a noise reduction circuit(compared to the 925), but I can't imagine what it does. The range of 150 ft is a joke-maybe on Mars. Even disregarding the noise issue, they really can't be reliably used more than 4 feet from the based. The engineers involved with this one should be spanked. Doesn't Sony test these things before production? It could also be that the 900 MHz band just isn't a good one for this application. The Sennheisers(RS110) have some interference problems also, but the noise is noticeably less and the sound quality much better.
Lost my Faith in the Church of Sony December 1, 2007
21 out of 21 found this review helpful
This looks like the most elegant product of its kind at this price tier. Indeed, the design is terrific, and they actually look nice sitting on my entertainment center unused. The problem is that they DON'T WORK.
1. Batteries: the rechargable battery (great idea) was apparently broken before I opened the box - the phones have never held a charge. Powering them with disposable AAA's is an option, but disposable batteries appear to drain 24/7 whether the phones are being used or not. After a month of ownership, and perhaps 15 hours of use, I have fed these phones 4 sets of batteries already.
2. Sound and Signal: As others have noted the sound quality is tinny to begin with. Voices sound ok, but any stereo sound effects are muted. Then there is the static, which is ever-present, unless I turn my head 90 degrees away from the base unit. (Since the base unit is in front of my TV, this makes viewing impossible.) But even if I could tolerate the sound quality, the signal is interrupted every 45-60 seconds by an unpleasant "wonk" sound, like a bicycle horn through a toilet paper tube. All of this is a problem at 15 feet or less. Admittedly, the sound quality does not get any worse as I move away from the base unit. Even on the other side of my house, through 3 walls, I can still "enjoy" these phones, to the limited extent that's possible.
3. Design: While the base unit is attractive, and the earpieces are cozy, the design still leaves a lot to be desired. Most irritatingly, the phones have no "off" switch. Instead, they activate automatically when you pull them over your head, and thereby place tension on the second (inner) head band. I have a really big head, and I have to pull them down almost over my cheeks before the phones will activate. But there is enough tension in the inner band to pull them back up over my ears (where they should be) - at which point they deactivate.
I have always been one of the faithful at the Church of Sony and I stupidly bought these off-the-rack at Best Buy without checking the Amazon reviews. I will never make the same mistake with Sony products again...
Save your money September 14, 2007
15 out of 15 found this review helpful
This product is very convenient. It turns on when you put them on (it usually takes a 10-40 seconds). However the sound quality is absolutely terrible. There is a lot of static even when I sit 10 feet from the unit with clear line of sight.
Sony headphones $59 headphones for $99 November 18, 2007
8 out of 12 found this review helpful
Hello,The sound level from my new lap top is kinda weak.I picked up the 970 thinking that they would have ample volume.I plugged in the unit and found they wouldn't charge (Battery was in backwards).After screwing around with the battery I found the 970 charged and the battery lasts and lasts.They would be good for music if they sounded good but alas the 970 must be for dialog.I also found the 970 needs to be "dialed in".I can't help but to think after all is dialed in with 970 that the wife could walk around the house work and still watch the soaps. UPDATE it's been nearly a year...No denigration of quality what so ever.It's why people buy Sony brand
Skip this product, it s**ks. December 31, 2007
6 out of 6 found this review helpful
Bad product from a reputable company. I bought it based on the Sony name and had problems immediately. First the sound is awful, static is always present. Second, the transmitter quits at random times for no reason.
I took it back and got a replacement thinking I got a lemon, but no, the replacement did the same thing.
Skip the Sony brand for these headphones.
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