Mounting type | Tabletop Mount |
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Material | Glass Aramid Composite |
Model name | S8.4-NA |
Speaker type | Woofer |
Special feature | Hi Res Audio |
Recommended uses for product | For Music Players |
Compatible devices | Desktop |
Subwoofer diameter | 8 Inches |
Unit count | 1 Count |
Controller type | Corded Electric |
Colour | Black |
Included components | Subwoofer |
Product Dimensions | 40.9D x 29.2W x 27.9H Centimetres |
Item weight | 26.5 Pounds |
Is waterproof | False |
Manufacturer | Gibson |
Place of Business | Pickering, ON L1W 3Y8, CA |
Model | S8.4-NA |
Part Number | S8.4-NA |
Number of Processors | 1 |
Special features | Hi Res Audio |
Number of Items | 1 |
Speaker Amplification Type | Active |
Wattage | 109 watts |
Power source type | Corded Electric |
Batteries included | No |
Batteries Required | No |
Signal-to-noise ratio (dB) | 92 dB |
Material Type | Glass Aramid Composite |
Manufacturer | Gibson |
Item model number | S8.4-NA |
ASIN | B0939NWYJR |
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KRK S8.4 S8 Generation 4 8" 109 Watt Powered Studio Subwoofer
Purchase options and add-ons
Brand | KRK |
Speaker maximum output power | 109 Watts |
Frequency response | 133 Hz |
Connectivity technology | XLR |
Audio output mode | Mono |
About this item
- 8" glass aramid composite woofer
- Bass extension to 30Hz with a max SPL of 112 dB
- Footswitch control enables/disables sub and crossover filter (footswitch not included)
- Curved design with front-firing bass port for placement flexibility
- Powerful, lightweight Class D amplification
Frequently bought together

Product information
Technical Details
Additional Information
Date First Available | April 22 2021 |
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Customer Reviews |
4.6 out of 5 stars |
鶹 Rank |
|
Feedback
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Product description
"The S8.4 powered studio subwoofer builds upon KRK’s legacy for sonic accuracy in a compact form factor. The custom-voiced, glass-aramid woofer delivers tight, defined bass, while the Class-D power amplifier dramatically increases transient response, control and punch. The four-position selectable crossover lets you adjust the subwoofer setting easily to your existing monitors. Pairing the S8.4 subwoofer with KRK or another studio monitor delivers an optimized mixing and listening experience with extended low end, while the exclusive bypass-control feature provides full range audio to the monitors without switching off the subwoofer. KRK’s S8.4 subwoofer doesn’t just deliver precise bass and a rich feature set: it’s the next dimension in subwoofer performance."
Compare with similar items
This Item ![]() KRK S8.4 S8 Generation 4 8" 109 Watt Powered Studio Subwoofer | Recommendations | |||||
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Price | $499.00$499.00 | $639.99$639.99 | -25%$249.00$249.00 List: $329.95 | $542.00$542.00 | $239.98$239.98 | $199.99$199.99 |
Delivery | Get it by Wednesday, Jun 11 | Get it by Tuesday, Jun 10 | Get it by Tuesday, Jun 10 | Get it by Wednesday, Jun 11 | — | Get it by Tuesday, Jun 10 |
Customer ratings | ||||||
Sold by | 鶹.ca | Musique Gagné – Musical Instrument Store Est.1888 | 鶹.ca | Audioengine LLC | 鶹.ca | 鶹.ca |
speaker size | 8 inches | 8 inches | — | — | 6.5 inches | 8 inches |
power source | Corded Electric | Corded Electric | Corded Electric | AC | Corded Electric | Corded Electric |
connectivity tech | XLR | Auxiliary | Ethernet | RCA | XLR | RCA |
speaker type | Woofer | Subwoofer | Subwoofer | Subwoofer | Subwoofer | Subwoofer |
mounting type | Tabletop Mount | Tabletop | Floor Standing | Floor Standing | Floor Standing | Tabletop |
weight | 26.5 pounds | 33.6 pounds | 18.7 pounds | — | 10.41 pounds | — |
control method | touch | application | remote | touch | touch | remote |
model name | S8.4-NA | HS8S | NS-SW050BL | S8 | CR6S X Series | T5 |
frequency response | 133 hertz | — | 28 hertz | 27 hertz | — | — |
surround channels | — | — | 2.1 | 3 | 2.1 | 2 |
woofer diameter | 8 inches | 8 inches | 8 inches | 8 inches | 6.5 inches | 8 inches |
From the manufacturer


KRK S8.4
S8 Generation 4 Powered Studio Subwoofer, 8"
The S8.4 powered studio subwoofer builds upon KRK’s legacy for sonic accuracy in a compact form factor. The custom-voiced, glass-aramid woofer delivers tight, defined bass, while the Class-D power amplifier dramatically increases transient response, control and punch. The four-position selectable crossover lets you adjust the subwoofer setting easily to your existing monitors.
Pairing the S8.4 subwoofer with KRK or another studio monitor delivers an optimized mixing and listening experience with extended low end, while the exclusive bypass-control feature provides full range audio to the monitors without switching off the subwoofer. KRK’s S8.4 subwoofer doesn’t just deliver precise bass and a rich feature set: it’s the next dimension in subwoofer performance.
Key Features
- Footswitch control enables/disables sub and crossover filter (footswitch not included)
- Redesigned cabinet with a lower profile and front-firing bass port
- Powerful, lightweight Class D amplification
- Optimized four-position crossover control
- Universal connectivity: XLR, 1/4" TRS, and RCA inputs and outputs
- Polarity and input sensitivity controls
- Ground lift switch prevents ground loops

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Customer Reviews |
4.6 out of 5 stars 89
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4.6 out of 5 stars 138
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4.9 out of 5 stars 15
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Low-Frequency | 8" Glass Aramid Composite Woofer | 10" Glass Aramid Composite Woofer | 12" Kevlar Aramid Composite Woofer |
Frequency Response | 34.5Hz - 133Hz | 30Hz - 110Hz | 26Hz - 97Hz |
Max Peak SPL | 112.8 dB | 117.2 dB | 119.9 dB |
Power Output (Continous) | 109 Watts @ 1% THD+N @ 46Hz | 160 Watts @ 1% THD+N @ 44Hz | 220 Watts @ 1% THD+N @ 44Hz |
Signal to Noise Ratio | 92 dB | 92 dB | 92 dB |
Amplifier Distortion (THD + N) | ≤ 0.1% @-3dB Of Max Power Output 35Hz-133Hz | ≤ 0.12% @-3dB Of Max Power Output 31Hz-110Hz | ≤ 0.3% @-3dB Of Max Power Output 29Hz-97Hz |
AC Power Input | 100VAC-240VAC | 100VAC-240VAC | Selectable 110V-120V / 220V-240V |
Enclosure | 15 mm and 18 mm Reinforced MDF | 15 mm and 18 mm Reinforced MDF | 18mm Reinforced MDF |
Dimensions (H x W x D) | (H x W x D): 11" (279 mm) x 16.125" (410 mm) x 11.5" (292 mm) | (H x W x D): 13.4375" (341 mm) x 18.875" (479 mm) x 12.1875" (310 mm) | (H x W x D): 16.375" (416 mm) x 23.875" (606 mm) x 14.375" (365 mm) |
Weight | 26.5 lb. (12 kg.) | 35 lb. (15.88 kg.) | 62.5 Lb. (28.3 kg.) |
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Customer reviews
Customers say
Customers like the sound quality and power of the speakers. They mention they're perfect for home studio use and excellent for condo use.
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Customers are satisfied with the sound quality of the speakers. They mention it works fine with their Krk studio monitors.
"It's Incredibly powerful for its size & produces clean tight bass, however I noticed the bass starts distorting once the sub gets hot but once you..." Read more
"...Overall sound seems very accurate. Very happy with package. Came earlier than expected." Read more
"Fast delivery service, much faster than mentioned. The sound quality is absolutely perfect. Working fine with my Krk's studio monitors ...." Read more
"krk so powerful for a 8 inch sub love the sound pro subwoofer." Read more
Customers find the speakers perfect for home studio and excellent for condo use.
"...Working fine with my Krk's studio monitors . Perfect for home studio setup" Read more
"...Perfect for the home studio." Read more
"Excellent for condo use..." Read more
Customers are satisfied with the power of the speakers. They mention it's incredibly powerful for its size and produces clean, tight bass.
"It's Incredibly powerful for its size & produces clean tight bass, however I noticed the bass starts distorting once the sub gets hot but once you..." Read more
"krk so powerful for a 8 inch sub love the sound pro subwoofer." Read more
"The smallest in the KRK sub family yet really powerful. Perfect for the home studio." Read more
Reviews with images

Excellent for condo use
Top reviews from Canada
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- Reviewed in Canada on March 22, 2022Verified PurchaseIt's Incredibly powerful for its size & produces clean tight bass, however I noticed the bass starts distorting once the sub gets hot but once you let it cool it sounds clean again. I'd avoid usage at loud volumes for long periods of time as the amp can get really hot.
For mixing bass frequencies lower than 32Hz I strongly recommend going with the S10.4, I would've gotten that but I live in an apartment building and would never be able to get the most out of it without being a nuisance to my neighbors.
- Reviewed in Canada on March 10, 2022Verified PurchaseI'm using with Focal Solo 6 tops to provide greater low-end definition. After a lot of research, the KRK 8.4 sub suited my needs. I'm also using it with a sustain pedal to cut out bass sometimes. Was able to dial in the sound while listening to commercial music very quickly. I also got the ISOacoustic sub stand for my neighbours below. Overall sound seems very accurate. Very happy with package. Came earlier than expected.
I'm using with Focal Solo 6 tops to provide greater low-end definition. After a lot of research, the KRK 8.4 sub suited my needs. I'm also using it with a sustain pedal to cut out bass sometimes. Was able to dial in the sound while listening to commercial music very quickly. I also got the ISOacoustic sub stand for my neighbours below. Overall sound seems very accurate. Very happy with package. Came earlier than expected.
Images in this review
- Reviewed in Canada on September 23, 2023Verified PurchaseFast delivery service, much faster than mentioned. The sound quality is absolutely perfect. Working fine with my Krk's studio monitors . Perfect for home studio setup
- Reviewed in Canada on December 20, 2023Verified Purchasekrk so powerful for a 8 inch sub love the sound pro subwoofer.
- Reviewed in Canada on January 12, 2022Verified PurchaseThe smallest in the KRK sub family yet really powerful.
Perfect for the home studio.
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Reviewed in Canada on January 29, 2022Verified PurchaseQualité sonore exceptionnelle, fabrication de qualité. Je suis vraiment très heureux de cet ajout à mon studio.
Top reviews from other countries
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ArmandoReviewed in Mexico on December 23, 2022
5.0 out of 5 stars Excelente bocina! Simplemente es KRK que más puedo decir.
Verified PurchaseLa calidad de audio es espectacular si las combinas cómo es mi caso con las rokit 10 g4, si la compras no te arrepentirás.
- C. UstomerReviewed in the United States on April 6, 2025
5.0 out of 5 stars Very nice for music (heavy, solid, no rattles/booms, no hum, perfect back-panel controls)
Verified PurchaseI was looking to add a sub to enhance the bass in my music. I'm a long-time audiophile who has owned many subs over the decades. My fronts (JBL 530s) are beautiful but have only 5.5" drivers and drop off precipitously below 70hz. The bass in my music is played by instruments, not computers- nothing below 35hz is needed. This placed me in the market for a tight 8" sub. A key attribute I demanded was the ability to defeat the "Standby" setting, as a sub turning on and off is unlistenable to. (Don't believe the BS that you can't hear this.) The KRK 9 emerged and I purchased it. It has a perfect set of back-panel controls. I calibrated and evaluated everything using test-tone webpages and careful listening to music I know by heart, a method easier and far more accurate than YPAO. This sub is heavy, solid (no rattles/ "booming"), no hum, and plays well in the octave I need. Yes, it's expensive, but it actually enhances my sound quality for music. I've attached a photo of the optimal controls when paired with very capable bookshelf speakers. There is a 2009 remaster of "Seconds Out" by Genesis and in the song "Firth of Fifth" you hear clearly and distinguished the bass guitar and bass drum. This is a new revelation to me for an important piece of music. Bravo!
C. UstomerVery nice for music (heavy, solid, no rattles/booms, no hum, perfect back-panel controls)
Reviewed in the United States on April 6, 2025
Images in this review
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Darío Maldonado CardeñoReviewed in Mexico on July 18, 2023
5.0 out of 5 stars Muy bueno en estudio pequeño
Verified PurchaseQueda Perfecto para mi pequeño estudio
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Neftali HernandezReviewed in Mexico on August 23, 2022
5.0 out of 5 stars Poderoso como lo prometía
Verified PurchaseSi piensas ocuparlo en un espacio pequeño te recomiendo algo menos mounstroso, es más poderoso de lo que imaginaba, excelente compra si piensas armar tu estudio en casa
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EdupatoReviewed in Mexico on March 25, 2023
5.0 out of 5 stars Súper bocina
Verified PurchaseMe encantó su sonido y sus controles