Short answer: the KRK S12.4 is the newer model that replaces the KRK Systems 12S, but only the KRK Systems 12S has been measured and ranked so far, so this comparison is on specs and features rather than sound. The KRK Systems 12S is discontinued, so it is now a used buy.
The case for the KRK S12.4: A 12-inch Kevlar woofer in a reinforced MDF cabinet with a front-firing port, driven by a 220W Class-D amplifier.
On the KRK Systems 12S side: 12-inch Kevlar ported with 240W RMS offers smooth response and solid deep extension.
Price: the KRK S12.4 lists at $839 and the KRK Systems 12S at $899.
Buy the KRK Systems 12S if you want a speaker whose sound quality has been measured and ranked.
Buy the KRK S12.4 if you want the newer model, and you can wait for measurements to confirm how it sounds.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| KRK S12.4 | KRK Systems 12S | |
|---|---|---|
| Price | $839.00 | $899 Discontinued |
| Ranked | - | #25 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, front | ported, front |
| Drivers | 12” Kevlar driver | 12” (305mm) driver |
| Amplifier Power | 220W | 240W RMS |
| Country | United States | United States |
| Output SPL at 20 Hz | - | 92.8 dB |
| Output SPL at 25 Hz | - | 99.1 dB |
| Output SPL at 31.5 Hz | - | 111.0 dB |
| Output SPL at 40 Hz | - | 115.6 dB |
| Output SPL at 50 Hz | - | 118.7 dB |
| Output SPL at 63 Hz | - | 118.2 dB |
| Output SPL at 80 Hz | - | 115.8 dB |
| Output SPL at 100 Hz | - | 113.6 dB |
| Output SPL at 125 Hz | - | 110.6 dB |
| CEA-2010-A Average (40-80Hz) | - | 117.1 dB |
| Dimensions | - | 18.1”H x 15.9”W x 22.6”D (460.0 x 404.9 x 575.1 mm) |
| Weight | - | 66.6 lbs (30.2 kg) |
| Warranty | - | 3 |
| Measurement Source | - | Data-bass |
| Frequency Response | - | 32-139Hz |
| Inputs | - | XLR (stereo, balanced), TRS (stereo), RCA (stereo) |
| XLR Input | - | Yes |
| RCA Input | - | Yes |
| TRS Input | - | Yes |
| Optical Input | - | No |
| Coaxial Input | - | No |
| USB Input | - | No |
| HDMI Input | - | No |
| AES Input | - | No |
| Aux Input | - | No |
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
KRK S12.4: $839.00 Amazon eBay
Older model: the KRK Systems 12S (rated 3.9/5).
Pros: A 12-inch Kevlar woofer in a reinforced MDF cabinet with a front-firing port, driven by a 220W Class-D amplifier. A four-position selectable crossover matches it to existing studio monitors, and the included bypass footswitch mutes the sub and sends full-range audio to the monitors for mix checks.
Cons: No independent measurements yet, so its output can’t be compared with ranked subwoofers. It is built as a studio monitor partner, so its controls suit a desk setup more than a home theater receiver.
Full KRK S12.4 review and specifications →
| Amplifier Power | 220W |
|---|---|
| Country | United States |
| Drivers | 12” Kevlar driver |
| Enclosure | ported, front |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
KRK Systems 12S: $899 Discontinued eBay
Newer model: the KRK S12.4. It’s likely to perform similarly, though we don’t have measurements to confirm that yet.
Pros: 12-inch Kevlar ported with 240W RMS offers smooth response and solid deep extension. Little port noise with no cabinet rattle. Highly recommended professional studio subwoofer at fair price point.
Cons: Discontinued.
Full KRK Systems 12S review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 240W RMS |
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 117.1 dB |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 18.1”H x 15.9”W x 22.6”D (460.0 x 404.9 x 575.1 mm) |
| Drivers | 12” (305mm) driver |
| Enclosure | ported, front |
| Frequency Response | 32-139Hz |
| HDMI Input | No |
| Inputs | XLR (stereo, balanced), TRS (stereo), RCA (stereo) |
| Measurement Source | Data-bass |
| Optical Input | No |
| Output SPL at 20 Hz | 92.8 dB |
| Output SPL at 25 Hz | 99.1 dB |
| Output SPL at 31.5 Hz | 111.0 dB |
| Output SPL at 40 Hz | 115.6 dB |
| Output SPL at 50 Hz | 118.7 dB |
| Output SPL at 63 Hz | 118.2 dB |
| Output SPL at 80 Hz | 115.8 dB |
| Output SPL at 100 Hz | 113.6 dB |
| Output SPL at 125 Hz | 110.6 dB |
| RCA Input | Yes |
| TRS Input | Yes |
| USB Input | No |
| Warranty | 3 |
| Weight | 66.6 lbs (30.2 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons