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KRK S8.4 S8 Generation 4 8" 109 Watt Powered Studio Subwoofer

4.6 out of 5 stars 89 ratings

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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

This item: KRK S8.4 S8 Generation 4 8" 109 Watt Powered Studio Subwoofer
$499.00
Get it by Wednesday, Jun 11
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Product information

Technical Details

Mounting type ‎Tabletop Mount
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

Additional Information

Date First Available April 22 2021
Customer Reviews
4.6 out of 5 stars 89 ratings

4.6 out of 5 stars
鶹 Rank

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KRK S8.4 S8 Generation 4 8" 109 Watt Powered Studio Subwoofer


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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."

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This Item
KRK S8.4 S8 Generation 4 8" 109 Watt Powered Studio Subwoofer
KRK S8.4 S8 Generation 4 8" 109 Watt Powered Studio Subwoofer
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Price$499.00$639.99-25%$249.00
List:$329.95
$542.00$239.98$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
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From the manufacturer

Feel the bass. New pro subwoofer series.
Main Product Image

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
KRK Subwoofers
S8.4
S10.4
S12.4
Customer Reviews
4.6 out of 5 stars 89
4.6 out of 5 stars 138
4.9 out of 5 stars 15
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

4.6 out of 5 stars
89 global ratings

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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.

5 customers mention "Sound quality"5 positive0 negative

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

3 customers mention "Home studio use"3 positive0 negative

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

3 customers mention "Power"3 positive0 negative

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

Excellent for condo use
5 out of 5 stars
Excellent for condo use
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.
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Top reviews from Canada

  • Reviewed in Canada on March 22, 2022
    Verified Purchase
    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 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.
    One person found this helpful
    Report
  • Reviewed in Canada on March 10, 2022
    Verified Purchase
    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.
    Customer image
    5.0 out of 5 stars
    Excellent for condo use

    Reviewed in Canada on March 10, 2022
    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
    Customer imageCustomer image
    One person found this helpful
    Report
  • Reviewed in Canada on September 23, 2023
    Verified Purchase
    Fast 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, 2023
    Verified Purchase
    krk so powerful for a 8 inch sub love the sound pro subwoofer.
  • Reviewed in Canada on January 12, 2022
    Verified Purchase
    The smallest in the KRK sub family yet really powerful.

    Perfect for the home studio.
    One person found this helpful
    Report
  • Reviewed in Canada on January 29, 2022
    Verified Purchase
    Qualité sonore exceptionnelle, fabrication de qualité. Je suis vraiment très heureux de cet ajout à mon studio.
    Report

Top reviews from other countries

Translate all reviews to English
  • Armando
    5.0 out of 5 stars Excelente bocina! Simplemente es KRK que más puedo decir.
    Reviewed in Mexico on December 23, 2022
    Verified Purchase
    La calidad de audio es espectacular si las combinas cómo es mi caso con las rokit 10 g4, si la compras no te arrepentirás.
    Report
  • C. Ustomer
    5.0 out of 5 stars Very nice for music (heavy, solid, no rattles/booms, no hum, perfect back-panel controls)
    Reviewed in the United States on April 6, 2025
    Verified Purchase
    I 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!
    Customer image
    C. Ustomer
    5.0 out of 5 stars
    Very nice for music (heavy, solid, no rattles/booms, no hum, perfect back-panel controls)

    Reviewed in the United States on April 6, 2025
    I 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!
    Images in this review
    Customer image
  • Darío Maldonado Cardeño
    5.0 out of 5 stars Muy bueno en estudio pequeño
    Reviewed in Mexico on July 18, 2023
    Verified Purchase
    Queda Perfecto para mi pequeño estudio
  • Neftali Hernandez
    5.0 out of 5 stars Poderoso como lo prometía
    Reviewed in Mexico on August 23, 2022
    Verified Purchase
    Si 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
  • Edupato
    5.0 out of 5 stars Súper bocina
    Reviewed in Mexico on March 25, 2023
    Verified Purchase
    Me encantó su sonido y sus controles