Is there a device which can convert 2 audio inputs into 1 input?

Hi,

I'm new here ...
I've got a Speaker(amp) which have one audio entry (jack) ...
I'd like to put 2 output in it (tv and hifi) ...

Should I make a simple Y cable ? Or can I bought a device which accept 2 entry and convert signal into one ?
I don't want a switch ... I would like to have a device which could take the current playing line, or both (if both are playing) ...
Is this kind of device exists ? where could I buy it ?
Don't want an audio/pro system ... Just want the simplest/cheapest thing ...

Thanks in advance

 

You could make a simple y cable to connect both outputs to 1 input, but they will influence each other.
You can try if it suits you, but it is not the best solution.
I would at least add some resitors in series to each channel, to reduce the fact the tv and the hifi will see the other. You could use a stereo pot-meter to fade between TV and HIFI...

But the other way... Why dont you connect the TV to the HIFI and the HIFI only to the Spaeker system.

 

Definitely !!