What subwoofer impedance does it need?

It is designed for a 1-ohm load. A dual 2-ohm sub wired in parallel gives 1 ohm. Higher-impedance subs will draw less power from it.

Can I bridge two of these?

No. It is a single-channel monoblock and is not bridgeable. Use one amp per sub or step up to a larger multi-amp setup.

It is not rated for marine use. Mount it in a car or other dry, ventilated spot.

Check the box contents with the seller. Many DS18 mono amps ship with a bass remote, but confirm before buying.

For most single 12-inch subs rated near this power at 1 ohm, yes. Match the sub's RMS rating to the amp's output to avoid overdriving it.

At Best Buy, for $199.95, as of our latest check.

$199.95at Best BuyChecked Nov 9

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