Lg tv the speaker sounds all muffled can I change the speaker in it or any suggestions

Try listening with headphones. If that resolves the problem, then your TV speaker amplifier has failed, or your spakers have.

Please illuminate me explaining the word "Muffled" means and i will be glad to help you out...

check the wiring it may loosen or some loose connection inside needs to be resolder, but it inside the tv so call service tech in your area

Maybe some wire is faulty... Try to disconnect everything and connect each speaker one by one, first trying only radio tuner and then trying to connect the TV and other devices. Using that you can isolate the fault into the specific component/wire.

If these speakers are two or three way speakers, it is possible that the tweeter(s) are blown in them.
Try and remove cover to check.
If the sound is not distorting, but just flat and muddy its the tweeters.
Put the other ones on this channel, to make sure it is not the amp.

after you play a cd while the cd is playing go into your audio settings and adjust theres settings foe each part on a stereo if u set the audio for AM//FM then play a cd the stereo changes to the cd settings

switch the HDMI cables around to make sure its not one of them, if the problem is one of them it will move with the cable,if no change i would suspect the coaxial cable next.

The speakers sound all good because you said "the speakers" are muffled .....it sounds like a problem on the board.....a capacitor a resister but its fixable....unfortunately only by a repairman

In my case, turning the surround sound OFF is what fixed the problem. The bass contibutes most to the perception of the location of a sound. If surround is ON without surround speakers connected, the internal TV speakers can only take the place of what would be the front speakers in a surround system. So turn surround OFF and set your bass preference wherever you want it. That worked for me.

check to see if the radio is clear. If it is it may be the signal going into the amplifier. if it is muffled as well, depending if you have an Equalizer hooked to the unit. This also could cause the problem. Finally check the bass, treble balance and volume knob but turn them back and forth while unit is on and see if signal clears up momentarily. if this is the case the control knobs need to be cleaned. Also spin the connection jacks {RCAs} in the rear and see if this clears it up. If not you may have to have the unit serviced by a professional.