JTR Speakers Captivator S2 vs JBL 4645C

Short answer: both are discontinued, so this only matters if you are buying used. Used, the JTR Speakers Captivator S2 is the better pick: it ranks #9 of 143 subwoofers by sound quality (rated 4.5/5), against #25 (rated 4.4/5) for the JBL 4645C. If you want one new, the JTR Speakers Orbit Shifter PRO ranks #1 at $4,499.

Why pick the JTR Speakers Captivator S2: A tall sealed subwoofer with two 18 inch drivers and serious deep bass output for demanding movies in a large room. The catch: The 1016.0H x 533.4W x 457.2D mm cabinet and 220 lbs (99.8 kg) mass make this a serious placement and moving commitment.

The case for the JBL 4645C: A pro cinema 18 inch ported subwoofer with very strong upper bass punch, suited to adding impact in a modest room. Watch for: Deep-bass output is limited relative to its midbass result, so it is not the right choice for the lowest movie effects.

Buy the JTR Speakers Captivator S2 only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, start with the JTR Speakers Orbit Shifter PRO instead.

Still deciding? The full Subwoofers rankings cover every ranked option.

Prices on this page were last checked October 29, 2026 at 4:42 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.

As an eBay Partner, we may be compensated if you make a purchase.

Specifications Side By Side

Related Speaker Comparisons

More worthwhile head-to-heads for JTR Speakers Captivator S2:

• JTR Speakers Captivator S2 vs JTR Speakers Orbit Shifter PRO
• JTR Speakers Captivator S2 vs JTR Speakers Orbit Shifter LFU
• JTR Speakers Captivator S2 vs WW Speaker Cabinets X21 - B&C 21DS115-4
• JTR Speakers Captivator S2 vs Pro Audio Technology LFC-24sm
• JTR Speakers Captivator S2 vs Power Sound Audio (PSA) TRIAX