A:Answer you will need one of two items, a wireless receiver or wireless amplifier. the two are very different. With both it removes the need to run wires to the back of your room for surround sound. an amplifier still requires speaker cables to go from the amplifier to your existing rear speakers, a true wireless receiver wont use the existing speakers but will use wireless S-Air speakers that only need their own AC power.
here is a list of S Air devices to get you started
The AIR-A10R Wireless receiver listed here will allow wireless rear speakers (sold separately) to connect to your Home Theater System without stringing wires to the speakers.
AIR-SA50R Wireless Speakers with self amplification will require an S- Air Receiver like the AIR-A10R or ALTA33PC (both sold separately).
The ALTA33PC Wireless receiver will allow wireless rear speakers (sold separately) to connect to your Home Theater System without stringing wires to the speakers same as the above AIR- A10R
a less expensive option would be
The WAHT-SA20 S-AIR™ Wireless Rear Amplifier and use your existing speakers. it would just mean the rear speakers would connect to it instead of all the way at the front of the room.
for a more in depth explanation see page 42 of the operating instructions of your 370 Home Theater system.
http://www.docs.sony.com/release/BDVE370.pdf
