We examined a small car subwoofer amplifier module. While not easily seen, the core design has a few minor flaws. The components selection is a little odd. The subwoofer filter circuit is moderately ...

Its sibling, the Volt—a car from which the Spark EV’s engineers borrowed liberally—is good for 40 or so miles, while the Nissan Leaf averaged 58 miles in our testing. Recharge Time.