Had an identical problem!
Shopped around and bought these... click here
Two disadvantages with my new television.
*The external sound is not controlled by the tv volume
*because my tv had phono sockets out, I had to get adaptors - but you do have the advantage of a 3.5 socket.
The woofer is tucked down behind the cabinet and I can now sit and watch HDTV with HD sound.
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