JTR Speakers Kallos 12Sub vs JTR Speakers Captivator RS1

Short answer: the JTR Speakers Kallos 12Sub. It ranks #2 of 212 subwoofers by sound quality, rated 4.5/5, at $3,699. The JTR Speakers Captivator RS1 ranks #56, rated 4.2/5, at $3,300, $399 cheaper, which does not close the gap in sound quality.

Why pick the JTR Speakers Kallos 12Sub: A compact sealed 12 inch subwoofer with a very powerful amplifier, smooth tuning and high output in a Baltic birch cabinet. The catch: Erin’s Audio Corner tested it outdoors on video, but CEA-2010 output figures in the form the other subwoofers here are ranked on haven’t been published, so it can’t be placed against them.

What the JTR Speakers Captivator RS1 does well: A compact sealed 18 inch subwoofer with strong deep bass for home theater and both balanced and RCA inputs. The tradeoff: The 533.4H x 533.4W x 457.2D mm cabinet and 117.1 lbs (53.1 kg) mass make this a serious placement and moving commitment.

Buy the JTR Speakers Kallos 12Sub. It is rated higher for sound quality, and the $399 you would save on the JTR Speakers Captivator RS1 does not close the gap.

Worth knowing: the JTR Speakers Kallos 12Sub has not been measured yet. Its rating is estimated from related models, with a likely range of 4.3 to 4.7, so treat this verdict as provisional.

Want more options? Browse the full Subwoofers rankings.

Prices on this page were last checked November 14, 2026 at 6:17 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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Specifications Side By Side

Where the Ratings Come From

• JTR Speakers Kallos 12Sub: reviews by Erin’s Audio Corner.
• JTR Speakers Captivator RS1: manufacturer specifications and listening comparisons; no independent measurement has been published yet.

This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.

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