Short answer: the Klipsch R-121SW. It ranks #95 of 145 subwoofers by sound quality, rated 3.6/5, at $249; the Klipsch R-12SW ranks #120, rated 3.3/5, at $249. With prices this close, go by the sound-quality ranking rather than the cost.
The case for the Klipsch R-121SW: 12-inch spun-copper driver with 200W RMS delivers controlled, musical bass with minimal distortion.
Why pick the Klipsch R-12SW: 12-inch copper-spun IMG driver provides low frequency with minimal breakup/distortion.
Buy the Klipsch R-121SW. It is rated higher for sound quality than the Klipsch R-12SW at the same price, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| Klipsch R-121SW | Klipsch R-12SW | |
|---|---|---|
| Price | $249.00 | $249.00 |
| Ranked | #95 of 145 in Medium Home Subwoofers (30-75 lbs) | #120 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, rear | ported, rear |
| Output SPL at 15 Hz | 90.7 dB | 68.5 dB |
| Output SPL at 20 Hz | 96.0 dB | 86.9 dB |
| Output SPL at 25 Hz | 98.4 dB | 97.1 dB |
| Output SPL at 31.5 Hz | 102.3 dB | 100.0 dB |
| Output SPL at 40 Hz | 108.2 dB | 104.7 dB |
| Output SPL at 50 Hz | 112.4 dB | 109.0 dB |
| Output SPL at 63 Hz | 112.9 dB | 111.2 dB |
| Output SPL at 80 Hz | 111.3 dB | 109.3 dB |
| Output SPL at 100 Hz | 109.9 dB | 107.6 dB |
| Output SPL at 125 Hz | 108.3 dB | 105.8 dB |
| CEA-2010-A Average (40-80Hz) | 111.2 dB | 108.5 dB |
| Dimensions | 16.6”H x 16”W x 19.7”D (421.6 x 406.4 x 500.4 mm) | 16”H x 14”W x 18.5”D (406.4 x 355.6 x 469.9 mm) |
| Weight | 35.1 lbs (15.9 kg) | 33.1 lbs (15.0 kg) |
| Warranty | 5/2 | 5/2 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | ErinsAudioCorner |
| Amplifier Power | 200W RMS | 200W RMS |
| Frequency Response | 28-120Hz | 29-120Hz |
| Drivers | 12” (305mm) driver | 12” (305mm) driver |
Related Speaker Comparisons
How Klipsch R-121SW compares with other leading options:
- JTR Speakers Captivator 212PRO vs Klipsch R-121SW
- Klipsch R-121SW vs MartinLogan Dynamo 1600X
- HSU Research ULS-15 MK2 vs Klipsch R-121SW
- Klipsch R-121SW vs Monoprice SW-12
- Klipsch R-121SW vs Power Sound Audio (PSA) XV15
Prices on this page were last checked September 29, 2026 at 3:43 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
Klipsch R-121SW: $249.00 Amazon eBay
Pros: 12-inch spun-copper driver with 200W RMS delivers controlled, musical bass with minimal distortion. Front-firing design maximizes placement flexibility. Excellent value with exceptional bang-for-buck.
Full Klipsch R-121SW review and specifications →
| Amplifier Power | 200W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 111.2 dB |
| Cabinet Color | black |
| Country | United States |
| Dimensions | 16.6”H x 16”W x 19.7”D (421.6 x 406.4 x 500.4 mm) |
| Drivers | 12” (305mm) driver |
| Enclosure | ported, rear |
| Frequency Response | 28-120Hz |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 90.7 dB |
| Output SPL at 20 Hz | 96.0 dB |
| Output SPL at 25 Hz | 98.4 dB |
| Output SPL at 31.5 Hz | 102.3 dB |
| Output SPL at 40 Hz | 108.2 dB |
| Output SPL at 50 Hz | 112.4 dB |
| Output SPL at 63 Hz | 112.9 dB |
| Output SPL at 80 Hz | 111.3 dB |
| Output SPL at 100 Hz | 109.9 dB |
| Output SPL at 125 Hz | 108.3 dB |
| Warranty | 5/2 |
| Weight | 35.1 lbs (15.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- Klipsch R-121SW vs RSL (Rogersound Labs) Speedwoofer 10S MKII
- Klipsch R-121SW vs Monoprice Monolith M-10 V2
- Klipsch R-121SW vs Monoprice SSW-10
- Klipsch R-121SW vs Kef KC62
- Klipsch R-121SW vs SVS PB-1000 PRO
- Klipsch R-121SW vs SVS SB-2000
- Klipsch R-121SW vs JBL HDI-1200P
- Klipsch R-121SW vs Power Sound Audio (PSA) XS15SE
- See all 18 comparisons
Klipsch R-12SW: $249.00 Amazon eBay
Pros: 12-inch copper-spun IMG driver provides low frequency with minimal breakup/distortion. 400W digital amplifier (200W RMS) with 29-120Hz frequency response. Unique copper diaphragm ensures durability while producing deep bass without distortion. Clean detailed bass at this price range stands out. Elegant cube design (14x18.5x16 inches, 30 lbs) with straightforward setup and easy connectivity via RCA inputs.
Full Klipsch R-12SW review and specifications →
| Amplifier Power | 200W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 108.5 dB |
| Cabinet Color | black |
| Country | United States |
| Dimensions | 16”H x 14”W x 18.5”D (406.4 x 355.6 x 469.9 mm) |
| Drivers | 12” (305mm) driver |
| Enclosure | ported, rear |
| Frequency Response | 29-120Hz |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 15 Hz | 68.5 dB |
| Output SPL at 20 Hz | 86.9 dB |
| Output SPL at 25 Hz | 97.1 dB |
| Output SPL at 31.5 Hz | 100.0 dB |
| Output SPL at 40 Hz | 104.7 dB |
| Output SPL at 50 Hz | 109.0 dB |
| Output SPL at 63 Hz | 111.2 dB |
| Output SPL at 80 Hz | 109.3 dB |
| Output SPL at 100 Hz | 107.6 dB |
| Output SPL at 125 Hz | 105.8 dB |
| Warranty | 5/2 |
| Weight | 33.1 lbs (15.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons