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Sony MDR-RF800R, wireless headphones feeding streaming audio over my home wifi network

post #1 of 5
10/21/10 at 3:21am
Thread Starter 

I want to have wireless headphones, to use  anywhere in my house, audio streaming from my desktop computer over my internet wireless router (tech. specs. below).

 

Would it be possible to modify the SONY MDR-RF800R wireless stereo headphones for this purpose? How should I proceed? Please note that I do not have the transmitter piece for this headphones.

 

 

 

Headphone User Manual with Specifications:

http://www.produktinfo.conrad.com/datenblaetter/300000-324999/303950-an-01-en-SONY_MDR_RF_800_FUNK_KOPFHOERER.pdf

 

Carrier Frequency: 863.52 Mhz and 864.52 Mhz

Modulation: FM stereo

 

 

 

Home internet wifi details:

RT-211 125Mbps Wireless ADSL2+ 4-port Router

· All-in-one solution: ADSL2+ Router, 125Mbps Wireless Access Point, Firewall and 4-port Switch.
· ADSL2+ Technology: High speed Internet with 24Mbps download and 4Mbps upload speeds
· Annex A and Annex B support: works with either the traditional PSTN or digital ISDN phone lines
· High speed wireless with G++: 125 Mbps wireless Access Point (when used with other AirTies wireless devices that also support 125Mbps). Also, backward compatible with 802.11b/g.
· Advanced Wireless Security: Latest wireless security technologies that support WPA (Wi-Fi Protected Access), WPA2 (IEEE 802.11i), WEP (Wired Equivalent Privacy) encryption and 802.1x standards
· Maximum Wireless Access range and Mesh Technology: Ranges of up to 400 meters outdoors and 100 meters indoors standard. Extendible with AirTies MESH Technology, using additional AirTies wireless access point devices.
· Automatic Wireless Key Setting: Automatic Wireless Security configuration for the router and the PC using the AirTies ADSL Utility.
· Advanced Firewall for maximum security: Advanced anti-DoS SPI Firewall; URL, IP and MAC address based filtering, DMZ
· Quick and easy installation with the Easy Setup CD
· Automatic Firmware updates: Automatic firmware update support through the AirTies ADSL Utility
· ADSL Usage Monitor: Especially useful for limited quota ADSL subscribers. Reports monthly total download and upload amounts and current download rate.
· DHCP server, advanced router with NAT, NAPT, RIPv1/v2 support
· 8 Channel PVC support
· VPN pass-through
· Robust against AC voltage fluctuations: Specially designed to withstand wide voltage fluctuations
· Wired device support: Connect up to 4 wired devices to your local network via the 10/100Mbps Ethernet ports.
· Web based user interface
 

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post #2 of 5
10/21/10 at 6:38am
Possible? Perhaps. But it will take a lot of effort and probably greatly increase the size, mass and power requirements of the headphones.

WiFi is a digital specification in a different frequency band. You would need to embed a wifi receiver, small microprocessor and DAC into the headphones. Basically turn it into a mini portable computer. Not saying it can't be done, but an iPod is a far easier solution for portable sound.

That being said, the headphones are just a glorified FM receiver embedded into the shells. I would try to find another base unit (transmitter) and call it day. Use the device in the intended manner and hook the base up to your source. If you need range, you can always mod the transmitter to put out more power. Might annoy your neighbors (and the FCC) if you get carried away. ;-)
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post #3 of 5
10/26/10 at 5:27am
Thread Starter 

Thank you for your answer.

 

I have an N800, looks like using that device instead would be better.

 

On the other hand, I do not want to have the transmitter, because this would be another RF additional to my already crowded home environment. Since I already have a wifi as a carrier possibility, I do not wish to add another with a new transmitter.

 

OK, the headphones are no good for streaming, what other use may I have for the headphone without adding it a transmitter which I do not have. Can they be modified to be used on the FM to listen to something?

 

In worst case, I will use these as headphones with cable, by removing the PCB's and the batteries.

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post #4 of 5
10/28/10 at 8:10pm
Well, they are designed to be used with the specified transmitter. I have no idea what the receiver Is capable of, but, I suspect it is pretty specialized in design. I doubt you could modify it to tune broadcast FM, but, you never can tell. You would probably need a schematic unless you have skills in reverse engineering circuits.

If you can provide circuit details, then anything is possible.
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post #5 of 5
11/9/10 at 12:22am
Thread Starter 

Unfortunatelly I do not have the circuit details :-(

But thank you very much for your help.

Best regards,

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