Help Need to combine L and R feeds for mono amp


I need to combine the L and R channel signals from a stereo CD player, and other stereo sources as well, to feed a mono amp. Can you tell me how to build a bridge device to accomplish this - maybe send me a simple schematic?

All help appreciated.
Cccc

This is for a vintage setup with HH Scott preamp/amp, Klipsch Corner Horn, Thorens TT, etc.
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Can't you simply use a splitter?

http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10401&cs_id=1040107&p_id=326&seq=1&format=2

-RW-
Thanks Ericjcabrera - I will look into that as soon as I get to town.

Thanks also Rlwainwright. I had tried using a reversed splitter and got poor mono signal, and then was advised by a nice person on thTs forum that doing so would cause more than one problem. Yhat individual suggested a simple "bridge" but did not give specifics. Thus, my request.

Anyone else have some info?

Cccc
Try this:

1 kilohm to each output. Tie the loose ends together. Take that into your mono amp. You may have to juggle the value some, and perhaps add a resistor to ground at that common point.
Hey Ar_t - thank you. Will try.
Cccc