Best loaded car subwoofer enclosures under $250

Top pick: Skar Audio SDR-1X12D2 — a ported 12" loaded box rated 600W RMS, from a brand that lives and breathes car bass, and the best-reviewed of the bunch. It's passive, so pair it with an amp that makes around 600W at 1 ohm.

Who the others suit:

• TROPO-1X12D2 — same idea, single 12" ported, if you want a slightly different tuning and a 1-ohm final load.
• TROPO-2X8D4 — dual 8" ported: big output in a shorter box, good for tight trunks.
• MTX TNE212D — dual 12" for maximum cone area on a modest amp.
• Rockville RWS12CA — powered and ultra-slim: no amp needed, slides under a seat.
• DS18 12" ported — budget single 12" if you're building a simple system.
• TROPO-1X8D2 / 1X10D2 — smaller single-driver boxes for limited space.

Check your amp's power at the box's final impedance before buying.