In order to use the first method, you'll need the skills of maintenance of TVs and perfect knowledge of the safety rules. Turn off the TV, open it (do not expose it to shock, not to break the picture tube or LCD panel), and then, without touching the picture tube, high voltage wire, as well as parts of the power supply, video amplifier, power Converter backlight (LCD TV), line scan (a tube in the TV - and any other parts), desolder the wires to the speaker, splice them long cable, and then output outside of the TV so that they do not pass near any high voltage circuits. Have a stereo TV output cables from both channels. Then close the housing unit. If you are not confident, commit the operation by a qualified technician.
Take a speaker system with a resistance similar to the same parameter built-in speaker of the TV or stronger than him. Connect the cable you output to this speaker system. If the resistance of one system is lower than the loudspeaker of the TV, but you have two of them and their total resistance exceeds this figure, connect them in series. If the TV is stereo, connect the acoustic system instead of each of the built-in speakers.
The second method does not require considerable skill, but involves the use of an external amplifier and requires the TV line-out sound. Output signal clear with RCA connector Audio out (building - ground, center pin - output of sound), with DIN-connector "VCR" (the middle contact is common, and output, depending on the model year of the TV, can serve as either the rightmost or the leftmost pin) or SCART connector (pin 3 - output, 4 - common).
The signal feed to the input of the amplifier, where it can be used connector to RCA or DIN. Way to connect to those connectors described above. The stereo amplifier features either two RCA jacks, either a single DIN, which is input to the right channel uses one of the extreme contacts (which depends on the year of its release), and for left - contact between the contacts of the right channel and common wires. If the TV is mono, and the amplifier - stereo inputs (but not outputs!) amplifier connect together.
Turn on the TV and in the presence of amp. In the second case, initially set the amplifier to minimal volume. Then adjust it to the desired level.
Do not perform the above-described manipulation with auto transformer and transformerless TVs.