Sony New Digital Cordless Headphones receive 100m far RF Signals
Sony New Digital Cordless Headphones MDR-RF4000K and MDR-RF810RK: Now there’s a smarter way to experience high quality sound in privacy and comfort while you’re listening to music or watching TV.
The luxuriously styled MDR-RF4000K digital cordless headphone from Sony offers fabulous digital sound for your favourite AV entertainment. It’s also designed to fit in perfectly with today’s living rooms, thanks to a unique new storage and charging dock that cuts unsightly wires.
Discreetly styled to complement the modern lines of your TV, the slim, convenient storage case doubles as a cable-free battery charger. After use, just fold the ear cups flat and the MDR-RF4000K stows neatly away while the battery recharges.
Digital RF transmission ensures clear, secure signal reception over a range of up to 30m. The headphone’s closed-type design cuts sound spillage, so there’s no need to disturb others while you’re enjoying the action packed finale of a favourite movie.
Exceptional audio quality is assured by the headphone’s powerful 40mm long-stroke diaphragm. You’ll be rewarded with beautifully detailed, immersive reproduction of movie soundtracks and dialogue, music and more.
The closed-type design also features swivel circum-aural cushions and a parallel-link self-adjusting headband for superb wear comfort, even for extended listening periods. Thanks to a convenient volume control on the headphone, there’s no need to reach for the remote to turn sound up or down.
The power-efficient design allows up to 7 hours continuous listening time between charges of the NiMH battery. Alternatively, slip in a single AAA alkaline battery and enjoy up to 10 hours listening without a break. An auto power-save feature switches off the headphone when it’s not being used, extending listening time still further.
Ultimate freedom: MDR-RF810RK cordless headphone
Also available this Spring, the MDR-RF810RK gives you supreme freedom to enjoy your hi-fi or TV in comfort and privacy, anywhere in your home.
Weighing just 220g (approx.), the easy-to-wear cordless headphone can receive analogue RF signals transmitted from the up to 100m away. Like the MDR‑RF4000K, it features a precision 40mm driver for uncompromised sound, plus a convenient volume control for easy level adjustment.
13 hrs listening time on a single charge of the NiMH battery is boosted even further to an incredible 28 hours uninterrupted listening on AAA alkaline battery power.
The new MDR-RF4000K and MDR-RF810RK wireless headphones are available from April 2010.
Specification table in comparison of MDR-RF4000K and MDR-RF810RK
| Features | MDR-RF4000K | MDR-RF810RK |
| Colours | Black | Black/Silver |
| Availability | April 10 | April 10 |
| Versions | EU8, CEK | EU8, CEK |
| Type | Closed | Closed |
| Freq. resp. (Hz) | 12-22,000 | 20-20,000 |
| Driver unit | 40mm | 40mm |
| Reception range (m) | 30 | 100 |
| Output power mW | 10 + 10 | 3+3 |
| Battery life (AAA/NiHM) | 7h / 10h | 28h / 13h |
| Charging time | 16h | 16h |
| Plug type | Connecting cord mini to phono, unimatch plug | Unimatch plug cord stereo to phono |
| Volume control | Built-in | Built-in |
| Channels | 1 | 2 |
| Key features | Swivel flat
Charging dock / storage case Stylish design Auto On/Off Circum-aural earcups |
|
| Accessories | AC power adaptor | AC power adaptor |
| Weight (g) | 300 | 220 |
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