I recently installed a subwoofer system into my 2000 Esprit that looks factory stock. It may not be the best system out there, but it does do a respectable job at handling the mid-low end range of the audio spectrum. What I did was install a performance sound system from a 1986-1988 Pontiac's Fiero GT. The Fiero's performance sound system is a cleverly designed amplifier that receives its signal from eight speaker wires and draws it's power from the radio's 12v power antenna line. There is no need to run separate wires from the battery. The amp is very small, runs cool and is able to fit inside the Esprit's cramped radio cavity by positioning it vertically to the left of the SRS control unit. The Fiero Subwoofer intensity control slider switch, which is typically located in the Fiero's dome light, was replaced with a rotary 20k pot w/lotus knob mounted in the Esprit's center console in the hole reserved for the non-USA window override button. For the subwoofers, due to the Esprit's extremely shallow firewall speaker cavities (<2"), I chose Earthquake's SWS-6.5X and they just barely fit the stock factory holes in the firewall. For the sub grills, I used the ones from Alpine's discontinued SPS-1729 (6.5") speakers since they visually match the rest of the car's stock speakers. I was pleasantly surprised that no modifications were necessary to make Alpine's grills fit over the Earthquakes subs. Even the four mounting screw holes of the grill's mounting ring aligned with those of the subs! Be forewarned that the speaker grills for Alpine's SPS-1629 speakers may visually look like the SPS-1729, but are actually smaller by