Hi,

I recently bought a X51 R3 with basic wifi&bluetooth option. And then I bought a Plantronics BackBeat Pro wireless bluetooth headset, which uses bluetooth 4.0 + EDR (A2DP for audio streaming, AVRCP for music controls, Hands-free v1.6 for wideband, and Headset v1.2).

And the headset connect perfectly with my iPad and HP laptop via bluetooth and the X51 can also connect to a wireless speaker (Sony SRS-X3) perfectly. The problem comes when I tried to connect the headset to X51, they paired, but the sound quality is VERY poor, like answering a phone call in bad signal. Could there be something wrong with the compatibility? I heard the new X51s also uses bluetooth 4.0 which I don't think is an issue.

Please help, thanks!