case is slanted parallel to the leather diaphragm shown best in fig1 a the presence of the hair substantially improves the acoustic impedance by selecting the appropriate thickness of hair and measuring with an impedance tube one can determine the optimum acoustic impedance to produce a higher sound pressure level the natural hair leather is extremely tough and for this reason it is therefore not easily deformed or torn with significant mechanical forces that typically occur when a loudspeaker driver is exposed to mishandling or a strong signal as is known the u201c woofing u201d action results in physical movement of the cone body which over repeated use or sudden burst of low frequency sound can result in diaphragm fracture of other structural compromise by incorporating the hair leather material this difficultly is obviated in respect of fig3 shown as a further embodiment of the present invention in partially exploded and cut away form where the diaphragm 14 referenced from fig1 and 2 is denoted by numeral 34 and comprises a conventional polypropylene material to which optionally may be attached a layer of leather bearing hair as denoted by numeral 36 as will be appreciated the material for diaphragm 34 could easily be paper fiberglass polymeric material composite material or a suitable metal material known for.