Single magnet coaxial loudspeaker having two air gaps on both sides of its faces, front gap of larger diameter for low frequency voice-coil and the opposite gap accommodating compression driver voice-coil. Front voice-coil drives low frequency membrane and rear voice-coil drives high frequency diaphragm, radiating sound waves through a phasing plug to the horn input through an opening into the magnetic structure, whereas the membrane acts as horn flair. Common region geometry around bottom pole of the magnetic structure controls flux line proportions between the two gaps. The five embodiments use series or parallel, inner or outer magnetomotive flux division. These are suitable for much simpler, more reliable and better balanced coaxial loudspeakers for professional and high-end markets.