Patent ID: 6937740

Claim:
A monopole low frequency test woofer, comprising: a rigid mounting plate having an acoustical opening; a monopole driver having a high mass cone and low resonance in free air, said driver being mounted on said mounting plate with a basket of said driver fitting about said acoustical opening; a rear tub attached to said mounting plate forming an enclosure housing said monopole driver so that sound radiates from said enclosure only through said acoustical opening, a top portion of a rear panel of said rear tub being offset inward toward said mounting plate to have lesser depth than a bottom portion of said rear tub to thereby form a slot; an electrical connector on said tub for connecting said monopole driver to an external circuit, said electrical connector being positioned in said slot flush with said bottom portion of said rear panel; and an inductor connected in series with said monopole driver, said inductor contouring frequency response of said monopole driver to match frequency response of a vehicle dipole speaker over a frequency range of interest.