Can I Use A Powered Subwoofer Without An Amplifier?
As stated before, many powered subwoofer units have their own amplifiers, meant for special purposes. While this amplifier is not as strong as a separate high-quality amplifier, it is more than enough to produce high-volume sound in most cars. So, if you do not require very high-intensity sound output from your stereo, a powered subwoofer can be used without an amplifier.