SVS 3000 Micro Subwoofer Review - Bass For Your Space - HomeTheaterReview
Pololu - Sub-Micro Servo 3.7g
Amazon.com: MTX TN8MS Terminator 8 Inch Micro Compact Amplified Subwoofer Enclosure for Small Vehicles with Class A/B Amplifier, Variable Bass Boost, External Bass Control, and Smart Engage Auto Turn On Circuitry :