Can someone remind me how to do a simple job please?

I have a motorcycle (K1200LT) with loudspeakers front and rear, with
independant volume controls. These are stereo fed from a Becker readio
cassette unit up front.

I want to provide mono (L+R) feeds into a helmet without stuffing the
amplifiers or affecting the loudspeaker output. So do I use a couple of
capacitors from the two lives or what? It's so long since I played with this
sort of thing.


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AJL Electronics (G6FGO) Ltd : Satellite and TV aerial systems
http://www.classicmicrocars.co.uk : http://www.ajlelectronics.co.uk