Mbq Super Compact Sub-Woofer

Space saving — under‑seat or slim enclosures let you add some decent bass without sacrificing trunk space. Useful in smaller vehicles or when you want a stealthy install.

Decent power for size — e.g. with RMS ≈120‑130 W, max ~180‑300 W depending on model, these are capable of giving you a good bump in bass without needing a huge amplifier or huge box.

Built‑in amplifier — simplifies installation; less need to buy external amp.

Frequency range good for most music — 30‑40 Hz low end captures lower bass (though not the very deepest sub‑bass that big 12‑inch or bigger subs might).