I want to add a sub but have no AV reciever

Possibly.
1. Is the audio out analog (not digital)?

2. Can you use the audio out along with the built-in speakers that you are using now?

3. Can both the audio out and built-ins be controlled by the same volume control?

Yes x 3 means it is a go.

Kal

Some Sony TVs have audio out on TV controlled by TV volume control, most TVs do not.

Thanks Kal and Stanwal. I have a Vizio SV472XVT. I checked and yes to all your points.

Thanks again,
Chris

There are seld powered center channels with remote powered subs. Which might fir your need. It is mid fi at best. These are called SOUNDBARS

Thanks Kal and Stanwal. I have a Vizio SV472XVT. I checked and yes to all your points.

Hi Chris555.

I am a new Vizio dealer and I think you are not reading the manual correctly.

To send "line level" output through your sets RCA analog outputs, you will need to "turn OFF" the internal speakers.

This then will only send the signal to the SUB you will be using, and you will have no main speakers playing.

I'm afraid to do what you wish would require also going with a prepro of some type that would then route that signal to BOTH main speakers and SUB.

As mentioned by some, there are powered SOUNDBARS with Subs that can do this for you also. In fact Vizio make a couple.