Originally Posted by Digimitch:
“TV is a Toshiba 40RL858.
MY son just plugged in a set of cheap redundant PC speakers which did improve the loudness but had an annoying crackle. Perhaps some higher quality PC speakers would do?? This TV is mainly used by my wife and disabled son and we each have a 'oneforall4' remote which by 'punchthrough' controls the TV volume whichever of the 4 devices (i.e. TV, Sky, DVD, or Satellite box) is currently selected!--hence the need to use the Headphone socket.
Soundbar not approved by 'she who must be obeyed'!!”
Surprised SWMBO doesn't mind speakers but won't have a soundbar?

Has she actually ever seen one in action? Most are so slim they just sit across the front of the TV pretty much just filling the gap between the bottom edge of the TV bezel and whatever the telly is sitting on. That Yamaha I linked to is only 4 inches high. Or this one
http://www.richersounds.com/product/...00/pion-sbx300
which is only just over 3ins high. Compare that to the TV at 24 or so inches tall.
Not to mention that the worst place possible for the speakers is hidden behind the TV and probably pressed up against the wall.
The crackle may not be the speakers. It is also possible it's the jack socket not making proper contact with the plug, maybe due to dirty contacts. You might be able to clear that up by twisting the plug round and round a few times in the socket.