Audiobugged...Sure they can. They have just two channels, with the sound intended for the rear out-of-phase between channels. When a quad record is played back through the intended decoder, out-of-phase signal is attenuated for the front speakers, and in-phase signal is attenuated for the rears. If you play the record without a decoder, the out-of-phase signal will come from the front speakers, but because it is out-of-phase it will not image, but will have a difuse and directionless quality. This is not bad.
