of the audio signal for the incoming telephone call from the same smartphone when the telephone call is terminated the audio playback signal is once again given priority for speaker output the speaker assembly 100 can be used as a speaker phone referring now to fig1 to 24 the speaker assembly 100 is shown with the protective cover 101 removed thereby exposing the rear housing portion 1100 the on board battery 1101 is visible in this view as are left and right woofers 801 l and 801 r respectively most of the on board circuitry is installed in chamber 1103 as is an on board microphone 1102 which provides speaker phone capability referring now to fig2 to 39 the front housing bezel 2501 is screwed to the rear housing portion 1100 shown in fig1 to 24 the woofers 801 l and 801 r each of which is operative for a different audio channel are actually mounted in the bezel 2501 which is then secured to the rear housing portion the passive radiators 901 l and 901 r are acoustically coupled to the woofers it will be seen that when the bezel 2501 is secured to the rear housing portion an acoustic chamber u2014 open at the front and rear of the speaker assembly 100 u2014 is formed around each woofer or audio speaker and its acoustically coupled passive radiator thus two chamber walls formed by abutting panel pairs 1104 l 3801 l and 1104 r 3801 r are positioned between woofers 801 l and 801 r and between passive radiators 901 l and 901 r in addition the onboard battery 1101 is positioned between the abutting panels pairs 1104 l 3801 l and 1104 r 3801 r it should be readily apparent that the two chamber walls.