Short answer: the KRK S10.4. Both are rated 3.6/5 for sound quality (#146 and #124 of 212 subwoofers), and the KRK S10.4 costs $479 against $499 for the RSL (Rogersound Labs) Speedwoofer 10S MKII, with sound quality a draw, the lower price decides it.
The case for the KRK S10.4: The 10” studio subwoofer in KRK’s fourth generation, with a glass aramid woofer, a 160W Class D amplifier and a four-position crossover. Watch for: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from KRK’s measured 12S (117.1dB in the 40 to 80Hz CEA-2010 bands), which it is not expected to match.
Why pick the RSL (Rogersound Labs) Speedwoofer 10S MKII: 10-inch ported with 400W RMS (1020W peak) XDR amplifier. Watch for: The ported cabinet is big and heavy for a 10 inch subwoofer, at 40.6 lbs (18.4 kg) and about 39 x 38 x 40 cm, and its rear port needs some space from the wall.
Buy the KRK S10.4. Both are rated the same for sound quality, and it costs $20 less than the RSL (Rogersound Labs) Speedwoofer 10S MKII.
About the ratings: the KRK S10.4’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 3.2 to 3.8, so this verdict could change once it is measured.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| KRK S10.4 | RSL (Rogersound Labs) Speedwoofer 10S MKII | |
|---|---|---|
| Price | $479.00 | $499 |
| Ranked | #146 of 212 in Medium Home Subwoofers (30-75 lbs) Estimated | #124 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Country | United States | United States |
| Warranty | 3 | 5/2 |
| Enclosure | ported | ported, rear |
| Drivers | 10” glass aramid composite woofer | 10” (254mm) driver |
| Amplifier Power | 160W Class D | 400W RMS |
| Frequency Response | 30-110Hz ±3dB (manufacturer specified) | 21-200Hz |
| Maximum SPL | 117dB (manufacturer specified) | - |
| Dimensions | 13.4”H x 18.9”W x 12.2”D (341 x 479 x 310 mm) | 15.5”H x 15”W x 15.7”D (393.7 x 381.0 x 400.0 mm) |
| Weight | 35.1 lbs (15.9 kg) | 40.6 lbs (18.4 kg) |
| XLR Input | Yes | - |
| AES Input | No | - |
| Output SPL at 15 Hz | - | 89.0 dB |
| Output SPL at 20 Hz | - | 100.0 dB |
| Output SPL at 25 Hz | - | 105.0 dB |
| Output SPL at 31.5 Hz | - | 107.7 dB |
| Output SPL at 40 Hz | - | 110.3 dB |
| Output SPL at 50 Hz | - | 112.9 dB |
| Output SPL at 63 Hz | - | 113.0 dB |
| Output SPL at 80 Hz | - | 112.1 dB |
| Output SPL at 100 Hz | - | 111.4 dB |
| Output SPL at 125 Hz | - | 110.7 dB |
| CEA-2010-A Average (40-80Hz) | - | 112.1 dB |
| Cabinet Color | - | black, white |
| Measurement Source | - | Audioholics |
Related Speaker Comparisons
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- JTR Speakers Captivator 212PRO vs RSL (Rogersound Labs) Speedwoofer 10S MKII
- MartinLogan Dynamo 1600X vs RSL (Rogersound Labs) Speedwoofer 10S MKII
- HSU Research ULS-15 MK2 vs RSL (Rogersound Labs) Speedwoofer 10S MKII
- Monoprice SW-12 vs RSL (Rogersound Labs) Speedwoofer 10S MKII
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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
KRK S10.4: $479.00 Estimated Amazon Sweetwater eBay
Same family: the KRK S8.4 (smaller subwoofer, estimated 3.3/5) and the KRK S12.4 (larger subwoofer, ranked higher, estimated 3.9/5). See every KRK S Subwoofers generation.
Pros: The 10” studio subwoofer in KRK’s fourth generation, with a glass aramid woofer, a 160W Class D amplifier and a four-position crossover. Rated 30 to 110Hz (±3dB) and 117dB, with balanced XLR and TRS inputs for studio use.
Cons: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from KRK’s measured 12S (117.1dB in the 40 to 80Hz CEA-2010 bands), which it is not expected to match.
Full KRK S10.4 review and specifications →
| Released | Mar 2021 (5 years ago) |
|---|---|
| AES Input | No |
| Amplifier Power | 160W Class D |
| Country | United States |
| Dimensions | 13.4”H x 18.9”W x 12.2”D (341 x 479 x 310 mm) |
| Drivers | 10” glass aramid composite woofer |
| Enclosure | ported |
| Frequency Response | 30-110Hz ±3dB (manufacturer specified) |
| Maximum SPL | 117dB (manufacturer specified) |
| Warranty | 3 |
| Weight | 35.1 lbs (15.9 kg) |
| XLR Input | Yes |
- 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
RSL (Rogersound Labs) Speedwoofer 10S MKII: $499 RSL eBay
Older models: the RSL (Rogersound Labs) Speedwoofer 10 (ranked higher, rated 3.7/5) and the RSL (Rogersound Labs) Speedwoofer 10S (ranked lower, rated 3.4/5). See every RSL Speedwoofer generation.
Same family: the RSL (Rogersound Labs) Speedwoofer 10E (smaller subwoofer, ranked lower, rated 3.3/5), the RSL (Rogersound Labs) Speedwoofer 10S (smaller subwoofer, ranked lower, rated 3.4/5) and the RSL (Rogersound Labs) Speedwoofer 12S (larger subwoofer, rated 3.7/5).
Pros: 10-inch ported with 400W RMS (1020W peak) XDR amplifier. DSP with dual modes (LFE mode for 22Hz extension, Music mode for tight response). Quick tight musical bass at excellent $499 price. Wireless receiver built-in.
Cons: The ported cabinet is big and heavy for a 10 inch subwoofer, at 18.4 kg and about 39 x 38 x 40 cm, and its rear port needs some space from the wall. Output falls to 89dB at 15Hz, and its 40 to 80Hz average of 112.1dB is a little below the sealed SVS SB-1000 PRO’s 113.9dB.
Full RSL (Rogersound Labs) Speedwoofer 10S MKII review and specifications →
| Released | Jun 2022 (4 years ago) |
|---|---|
| Amplifier Power | 400W RMS |
| CEA-2010-A Average (40-80Hz) | 112.1 dB |
| Cabinet Color | black, white |
| Country | United States |
| Dimensions | 15.5”H x 15”W x 15.7”D (393.7 x 381.0 x 400.0 mm) |
| Drivers | 10” (254mm) driver |
| Enclosure | ported, rear |
| Frequency Response | 21-200Hz |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 89.0 dB |
| Output SPL at 20 Hz | 100.0 dB |
| Output SPL at 25 Hz | 105.0 dB |
| Output SPL at 31.5 Hz | 107.7 dB |
| Output SPL at 40 Hz | 110.3 dB |
| Output SPL at 50 Hz | 112.9 dB |
| Output SPL at 63 Hz | 113.0 dB |
| Output SPL at 80 Hz | 112.1 dB |
| Output SPL at 100 Hz | 111.4 dB |
| Output SPL at 125 Hz | 110.7 dB |
| Warranty | 5/2 |
| Weight | 40.6 lbs (18.4 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
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- RSL (Rogersound Labs) Speedwoofer 10S MKII vs JBL Stage 220P
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monoprice SSW-10
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs BIC America PL-300
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs Monoprice Monolith M-10 V2
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs RSL (Rogersound Labs) Speedwoofer 10S
- RSL (Rogersound Labs) Speedwoofer 10S MKII vs SVS SB-2000 Pro
- See all 21 comparisons