Amazon.com: 70V 200W HIGH POWER LINE MATCHING TRANSFORMER: Electronics

Product Description

Product Description
These high quality transformers are designed to convert the output of any standard 4 or 8 ohm amplifier for use with a 70.7 volt public address sound distribution system. Available in 100 watt RMS and 200 watt RMS power handling. Frequency response: 40-20,000 Hz. Minimum efficiency: 85%. Mounting holes: 100W: 2.3" x 3.15" (center to center), 200W: 2.83" x 3.15" (center to center).

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70V 200W HIGH POWER LINE MATCHING TRANSFORMER

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2.0 out of 5 stars No instructions or documentation of any kind included., December 22, 2008

By	Christopher A. Wolter (Walnut Creek, CA USA) - See all my reviews (REAL NAME)

I'm not an electrician. I just want to hook up my 200W Sony stereo receiver to my office's speaker system. There are about a dozen speakers installed in different rooms. Each speaker has its own in-wall volume control with a small transformer attached to it.There are only 4 wires that come out of the wall, available to hook up with my receiver/amplifier. Evereything worked fine until last month, when burglars broke in and stole my receiver and some electronic gizmo that looks like the picture of this product. I have managed to figure out that it used as a 70-volt system, with down-converting transformers at each speaker. I tried hooking up this transformer between the speaker outputs of the amplifier and the 4 wires that come out of the wayy, but it doesn't work. I have tried every variation that I can think of. Since there isn't any documentation or instructioons with this product, I don't know what to try next! HELP!