I didnt realize until I bought it that this particular Visio didnt have an output for speakers, volume controlled or otherwise. Guess the assumption is that you are going to get your audio from the source, eg, sat/cable box, disc player, etc. [Guess they forgot about on-air TV.] I finally figured out there are adaptors available to go from the headphone [small] jack which Visio did have, to RCA cables to the DHS surround sounds which you could then control volume via the TV remote [sound guality is ok?????]. On the 03, the radio has to go thru the radio/video switch on the dash--which messes things a bit too.
2003 40' MDTS
Garden Ridge, Texas