A friend of mine gave me a bds Harman/Kardon with only 3 speackers: 2 front right and left and the center one. I don’t have the subwoofer. The bds works good but only with 2 front speackers. The center speacker don’t work, is because that I don’t have the subwoofer? The center speaker is ok it works I already checked it.
If the system thinks you are playing stereo, or you are playing stereo source and there is no special configuration how to deal with stereo sources, i.e.: do you want to apply virtual surround? Then stereo plays on 2 speakers, perfectly normal.
To enable center then, either you are playing a surround source, and your system is CONFIGURED for surround, it may not offer you a 3.1 setup, it may say configure for 2.0 or 2.1 or 5.1 and those are your choices in which case you should select 5.1 anyway, even though u won't have can't hear rear speakers but at least your center will be enable.