If it is truly mono the music in the right and left channel is identical, so it’s still mono. In the days when mono was the only way to get music home the source (record or tape) only had one channel and the mono electronics were connected to one speaker. Now that stereo is the rage, everyone has two (or more) speakers. So if you bought a mono LP, CD or download and the signal was only in one channel then it would only play on one speaker. I don’t think that would go over to good with the finicky consumer. So they put the same signal in both channels. It plays on two speakers, but it is mono. The only difference of one speaker versus two is two can produce a center image, but none of the right/left soundstage artifacts that a good stereo can.
this is interesting; then i mean i can use to chose to listen whit the left channel or right in my amp, and listen with one speaker only, to make it sound like mono in one speaker? i mean if the signal are identical, then i can chose, to listen to one speaker only ?
yes i had try that to, and i agreed, but my speakers are small or normal STANDMOUNT speaker, so the sound is not so “big” but im looking to buy a big old second hand speaker, so soon (i hope next year) i will try it ;
then i can compare my one channel vs 2 channels needle drop, of kind of blue mono 1959
By all means, try just one speaker. Might sound a little odd with the typical stereo speaker set up, i.e., one speaker on the left side and one on the right, but this is a free test!