Sony MDR-IF240RK Wireless Headphone System

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Product Description

Amazon.com Product Description
Go wireless with your music. The MDR-IF240RK wireless stereo headphone system features 30mm drive units for deep bass, up to 30 hours of battery life on a single charge, and a transmission range up to 24 feet. Permitting an easy connection to your home audio system, TV or VCR, these headphones provide a personal entertainment experience you can really move to.



Go Infrared
Infrared transmission works by sending out infrared light signals from the transmitter to the headphones. Infrared signals are resistant to external noise and interference, but the headphones must be within line of sight of the transmitter--the signal can't pass through walls, furniture, or other obstacles.
That said, these phones offer a 24-foot transmission range, for listening enjoyment throughout the room, and a 90° transmission angle (maximum) for uninterrupted listening as you move around.
A convenient mute function lets you temporarily suspend audio, and the simple controls include an automatic power switch and single volume control.
Lightweight, Comfortable Design
Wear the MDR-IF240RK phones comfortably for hours on end, thanks to a lightweight construction, wide headband, and open-air design that lets you continue to hear ambient sound.
Powerful Sound
30 mm diameter drive units deliver serious bass, and a wide dynamic range. PET diaphragms ensure high rigidity, which minimizes distortion, even at higher volume levels. Ferrite magnets combine high energy and small size, for ample sound output without weighing the headphones down.
Great Battery Life
The included NiCad rechargeable battery automatically recharges when you place the headphones on the supplied transmitter. Get up to 30 hours of life on a single charge, or switch to an optional AA alkaline battery for 100 hours.
MDR-V150 Specs
Frequency Response:
18Hz - 22,000Hz
Driver Unit:
30mm
Magnet Type:
Ferrite
Diaphragm:
PET
Effective Range:
24 ft (7m); 10 ft (3m) at +/-45°
Infrared Carrier Frequencies:
Right 2.8MHz, Left 2.3MHz; (Frequency Modulation)
Power Requirements:
AC 120V, 60Hz
Recharging Time:
24 hours (Approximate)
What's in the Box
MDR-IF240RK Headphones, Transmitter/Recharger, Rechargeable Battery, Connecting Cable, UniMatch Plug Adapter, AC Power Adapter
Go wireless with your music. The MDR-IF240RK wireless stereo headphone system features 30mm drive units for deep bass, up to 30 hours of battery life on a single charge, and a transmission range up to 24 feet. Permitting an easy connection to your home audio system, TV or VCR, these headphones provide a personal entertainment experience you can really move to.

Product Details

• Product Dimensions: 12 x 8.5 x 4.2 inches ; 2 pounds


• Shipping Weight: 3 pounds


• Shipping: Currently, item can be shipped only within the U.S.


• ASIN: B000095SB4


• Item model number: MDRIF240RK
  

Customer Reviews

This review is on the Sony MDR-IF240R not MDR-IF240RK, not sure if there's any difference. I needed a wireless headphone for the bedroom because I watch TV over 2 hours every night while my wife sleeps and about 2 hours early in the morning. I've also owned a wireless Sennheiser HDR60 and a wired Panasonic RP-HT970 Vibration Series Headphone. The Sennheiser worked fine, but their rechargeable battery (two included) would only last me about two days. I always had one recharging so I could swap it out, but it was still annoying to have it cut out in the middle of a program. After a year one of the batteries wouldn't hold a charge any more and when I saw how much a replacement battery cost, I decided to buy the Panasonic. Because it was wired, the Panasonic RP-HT970 sounded great, especially the bass effects with DVD's. It was very comfortable and I would still be using it, if I hadn't tripped on the cable and broke it. It had also been an obstacle for my wife when she had to walk across the room.
I decided to go wireless again and bought the Sony MDR-IF240R after reading reviews. I wanted a headphone that used standard batteries and wouldn't need constant replacing. I have cordless phones and a wireless PC network, so I decided having no interference using infrared was better than having the ability to go room to room using other technology. Since I only used it for TV viewing, I was willing to accept decent, if not great, sound quality. This headphone met all my requirements. I put in one standard AAA battery instead of the rechargeable battery that came with it and I haven't had to change it in over two weeks of constant use (4 hours/day).
The headphones are mostly plastic and look a bit cheap. They are fairly comfortable, but if I tilt my head, they will fall off because the foam cushions are flat rather than cupped like the Sennheiser and the headband is rather flimsy. That would be my biggest complaint. Sony should also have provided a longer cable for the transmitter to allow more flexibility in placement. Sound quality is fine for TV viewing, but it can't compare to the quality of a wired headphone like the Panasonic which makes you feel like you're actually in a movie when played on DVD.
I have perfect reception using it at 12 feet and I've walked 45 degrees to the left and right without any loss. If something comes between the headphone and the transmitter, it will cut out, so positioning is very important. You can eliminate the hiss that others have mentioned, if you turn up the volume on the sound source (e.g. TV or Receiver) rather than turning up the volume control on the headphone. On the Sennheiser there was a tuning control, which I had to fiddle with in order to receive a signal, but the Sony doesn't have or need one.
In conclusion, this headphone met all my expectations, the price was reasonable and I would recommend it to others until someone comes out without something that has better sound quality and excellent battery life.
Sound quality - 4 stars (compared to other wireless)
Battery life - 5 stars
Range - 4 stars
Comfort - 4 stars
Fit and finish - 3 stars
Price - 4 stars

These headphones are clearly not intended for listening to music at high quality. But I have been using them to listen to my TV, and am delighted with the ease of setup, ease of use, long battery life, and apparent immunity from interference.
You can't use them outside the room, and the sound quality is good but not great. Perfect for TV. Even if obstacles partly block the infrared path, the sound continues uninterrupted. The headphones are comfortable and light, and run for many hours before recharging.
I am totally satisfied with the product, and only wish I had ordered something like this years ago!