A mid-frequency loudspeaker drive unit includes a substantially conical
diaphragm having a forward periphery and a surround connected to and
extending from the forward periphery of the diaphragm to form a
substantially smooth transition from the diaphragm to the surround, the
diaphragm and the surround presenting a substantially smoothly continuous
outwardly facing surface. The drive unit can be part of a compound
loudspeaker drive unit including a high-frequency drive unit coaxially
disposed within the diaphragm and a chassis encompassing the mid-frequency
drive unit with the surround being secured to the chassis to form the
smooth transition from the diaphragm to the surround.
