Car Subwoofer Power

A good wattage for a car subwoofer is 400–1,000 watts RMS, depending on the size and design. Smaller 8-inch and 10-inch subs perform well around 300–600 watts, while 12-inch and larger models benefit from 600–1,200 watts. Subwoofers like Audiomobile, Image Dynamics, and Arc Audio handle clean power efficiently. RMS wattage matters more than peak numbers for real performance.

A 2-ohm sub usually gives more output because most amplifiers produce more power at lower impedance. A 4-ohm sub runs cooler and may offer cleaner performance if the amp is limited. The best choice depends on your amplifier’s rated power and stability. Matching impedance to the amp ensures stronger and safer performance.

No, 200 watts is not twice as loud as 100 watts. Doubling power increases volume by about 3 dB, which is a small but noticeable change. To sound twice as loud, you need about 10 times the power. Speaker efficiency and enclosure design influence loudness more than wattage alone.

Not typically. Two 12-inch subs are usually louder because their combined cone area is greater than a single 15. They move more air and produce stronger output with the same power. A 15-inch sub can play deeper, but two 12s deliver more overall volume when installed in proper enclosures.

The most powerful subwoofers are large-format drivers with high RMS ratings and big voice coils. In your lineup, models like Audiomobile 4415, Image Dynamics IDMAX, and high-power Arc Audio subs handle substantial wattage. These subs deliver serious output when paired with the correct enclosure. Power alone is not enough—box design and clean amplification are key.