db the preferred embodiment as described performs reliably in normal live sound situations with power amplifiers that can produce 150 watt rms to 450 watt rms into 4 ohms referring to fig1 and 5 the protective grill 5 may be replaced by a combination horn flare and protective grill 16 to increase mid band directivity and sensitivity fig6 demonstrates that exact size and shape of the enclosure 17 is not important as long as overall size is kept to a minimum but large enough to acoustically reproduce frequencies down to about 250 hz the material of the enclosure 17 is also unimportant as long as the enclosure 17 is rigid durable aesthetically pleasing and inexpensive to produce likewise driver 18 size is unimportant and can range from 3 inches to 8 inches diameter as long as moderate sensitivity and a minimum useable frequency response of at least 250 hz 10 khz is achieved fig7 and 9 illustrate various embodiments of electrical schematics of the invention all use a dynamic driver 6 that has a nominal impedance greater than 30 ohms all methods utilize a high pass filter to protect the dynamic driver from excessive cone excursion first and second order filters are described but higher order filters would offer improved driver protection at increased manufacturing costs referring to fig7 a rheostat 41 controls the volume of a dynamic driver 6 a capacitor 19 and an inductor 24 form a high pass filter a capacitor 23 and a switch 22 form an optional bright circuit to enhance the brilliance as the volume is reduced referring.