Short answer: the REL Acoustics HT/1003 MKII. It ranks #105 of 212 subwoofers by sound quality, rated 3.7/5, at $624.44; the Klipsch RP-1000SW ranks #142, rated 3.6/5, and costs $674.99, so there is little reason to consider the other one.
What the REL Acoustics HT/1003 MKII does well: Dedicated home theater design with a front-firing 10-inch CarbonGlas driver and NextGen5 300W Class D amplifier. The tradeoff: Omits REL traditional high-level speaker wire input, connecting exclusively via line-level RCA/LFE.
What the Klipsch RP-1000SW does well: The entry 10-inch model in Klipsch’s flagship Reference Premiere high-excursion subwoofer family. The catch: The 10-inch driver naturally gives up bottom-octave (16-25Hz) maximum output compared to the 12-inch Klipsch RP-1200SW and 14-inch Klipsch Reference Premiere RP-1400SW in larger home theater rooms.
Buy the REL Acoustics HT/1003 MKII. It is rated higher for sound quality than the Klipsch RP-1000SW and costs less, so only choose the other one for a particular feature it does better.
Worth knowing: the REL Acoustics HT/1003 MKII has not been measured yet. Its rating is estimated from related models, with a likely range of 3.5 to 3.9, so treat this verdict as provisional.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| REL Acoustics HT/1003 MKII | Klipsch RP-1000SW | |
|---|---|---|
| Price | $624.44 | $674.99 each |
| Ranked | #105 of 212 in Medium Home Subwoofers (30-75 lbs) Estimated | #142 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Country | United Kingdom | United States |
| Warranty | 3 | 5 |
| Enclosure | sealed | Ported, front Aerofoil slot port |
| Drivers | 10” (250mm) CarbonGlas cone, inverted carbon fiber dust cap | 10” front-firing Cerametallic high-excursion woofer |
| Amplifier Power | 300W RMS (NextGen5 Class D) | 300W RMS, 600W peak Class D |
| Frequency Response | 24Hz at -6dB (manufacturer specified) | 19Hz - 131Hz (+/- 3dB, Manufacturer specified) |
| Dimensions | 14.3”H x 14.3”W x 15.5”D (362 x 362 x 393 mm) | 16.7” x 15” x 21” (423 x 381 x 534 mm) |
| Weight | 34.2 lbs (15.5 kg) | 56.7 lbs (25.7 kg) |
| Bass Extension (-3dB) | - | 19Hz (measured, Audioholics) |
| Crossover Frequency | - | 40Hz - 160Hz variable |
| Inputs | - | Dual RCA line-in, WA-2 wireless port |
| Maximum SPL | - | 118.5dB (in-room) |
| Phase Control | - | 0° / 180° switch |
| RCA Input | - | Yes |
Related Speaker Comparisons
More top alternatives to REL Acoustics HT/1003 MKII:
- REL Acoustics HT/1003 MKII vs Sony Bravia Theater Sub 9
- Polk Audio Signature Elite ES10 Subwoofer vs REL Acoustics HT/1003 MKII
- Klipsch RP-1000SW vs ELAC Varro PS250
- Klipsch RP-1000SW vs REL Acoustics T/5x
- JBL L10cs Classic vs Klipsch RP-1000SW
Prices on this page were last checked October 11, 2026 at 4:59 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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The Two Speakers In Full
REL Acoustics HT/1003 MKII: $624.44 Estimated Amazon eBay
Same family: the REL Acoustics HT/1205 MKII (larger subwoofer, ranked higher, estimated 3.9/5) and the REL Acoustics HT/1510 Predator II (larger subwoofer, rated 4.1/5).
Pros: Dedicated home theater design with a front-firing 10-inch CarbonGlas driver and NextGen5 300W Class D amplifier. Delivers energetic, punchy bass response down to 24Hz (-6dB) in a compact, braced sealed cabinet.
Cons: Omits REL traditional high-level speaker wire input, connecting exclusively via line-level RCA/LFE. Sealed 10-inch cabinet runs into compression on sub-25Hz movie bursts compared to 12-inch and 15-inch models.
Full REL Acoustics HT/1003 MKII review and specifications →
| Amplifier Power | 300W RMS (NextGen5 Class D) |
|---|---|
| Country | United Kingdom |
| Dimensions | 14.3”H x 14.3”W x 15.5”D (362 x 362 x 393 mm) |
| Drivers | 10” (250mm) CarbonGlas cone, inverted carbon fiber dust cap |
| Enclosure | sealed |
| Frequency Response | 24Hz at -6dB (manufacturer specified) |
| Warranty | 3 |
| Weight | 34.2 lbs (15.5 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
Klipsch RP-1000SW: $674.99 each Amazon eBay
Same family: the Klipsch RP-1200SW (larger subwoofer, ranked higher, rated 3.8/5), the Klipsch Reference Premiere RP-1400SW (larger subwoofer, estimated 4/5) and the Klipsch RP-1600SW (larger subwoofer, rated 4.2/5).
Pros: The entry 10-inch model in Klipsch’s flagship Reference Premiere high-excursion subwoofer family. Combines a newly developed 10-inch front-firing spun-copper Cerametallic driver with an analog preamp stage and 300W RMS / 600W peak Class D amplifier. Features Klipsch’s internal flare Aerofoil slot port that eliminates port chuffing and turbulence at high velocity. CEA-2010 output data confirms robust output across the 31.5Hz to 80Hz range with extension reaching 19Hz in-room, providing tight, articulate musical punch with excellent transient speed.
Cons: The 10-inch driver naturally gives up bottom-octave (16-25Hz) maximum output compared to the 12-inch Klipsch RP-1200SW and 14-inch Klipsch Reference Premiere RP-1400SW in larger home theater rooms. The cabinet depth (534 mm) is substantial for a 10-inch sub.
Full Klipsch RP-1000SW review and specifications →
| Released | 2023 (3 years ago) |
|---|---|
| Amplifier Power | 300W RMS, 600W peak Class D |
| Bass Extension (-3dB) | 19Hz (measured, Audioholics) |
| Country | United States |
| Crossover Frequency | 40Hz - 160Hz variable |
| Dimensions | 16.7” x 15” x 21” (423 x 381 x 534 mm) |
| Drivers | 10” front-firing Cerametallic high-excursion woofer |
| Enclosure | Ported, front Aerofoil slot port |
| Frequency Response | 19Hz - 131Hz (+/- 3dB, Manufacturer specified) |
| Inputs | Dual RCA line-in, WA-2 wireless port |
| Maximum SPL | 118.5dB (in-room) |
| Phase Control | 0° / 180° switch |
| RCA Input | Yes |
| Warranty | 5 |
| Weight | 56.7 lbs (25.7 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons