Pricing and availability

We compare 600+ stores and found this item at 10 stores. Prices updated .

Sweetwater
4.5 (14)
$369.00
Guitar Center
4.0 (4)
$369.00 $299.00 $70.00 · All time low
Amazon
4.6 (306)
$368.95
Reverb
5.0 (3)
$375.98 7 available New
Musician's Friend
5.0 (1)
$295.00
B&H
5.0 (1)
$369.00
Thomann
4.8 (72)
$279.00
Gear4Music
£279.00

Average Price: $344

Budget/Beginner

$599

$1500+

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High-end

Price History

Based on price data from 8 merchants for "KRK S8.4 8" Powered Studio Subwoofer". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Get ready to feel the rumble with the KRK S8.4, a studio subwoofer that marries precision and power in a compact design. Featuring an 8-inch glass aramid composite woofer, this subwoofer delivers tight, punchy bass that’s perfect for both professional studios and home setups. The highly efficient Class D amplifier ensures enhanced transient response and control, making your low-end frequencies as crisp and defined as they should be.

Whether you're mixing, mastering, or just vibing, the KRK S8.4 offers immense versatility. Its extensive connectivity options, including XLR, 1/4-inch TRS, and RCA inputs, mean you can hook it up to almost any setup without the hassle of adapters. The subwoofer also includes a four-position crossover frequency selection switch, allowing you to tailor the sub's response to perfectly complement your existing monitors.

For those moments when you need full-range audio, the optional footswitch bypass feature lets you easily toggle the subwoofer's contribution without moving from your sweet spot. Add to this a sleek, low-profile cabinet that fits seamlessly into any studio environment, and you have a subwoofer that not only sounds incredible but also looks the part.

Key Features:

  • 8-inch glass aramid composite woofer
  • 109 Watt Class D amplifier
  • Frequency range: 34.5 - 133 Hz
  • Maximum sound level: 112.8 dB
  • Adjustable crossover frequency
  • Bypass function via optional footswitch
  • Switches for standby, ground/lift, polarity, and input sensitivity
  • Connectivity: XLR, 1/4-inch TRS, RCA inputs and outputs
  • Integrated power supply (100-240 V AC)
  • Compact MDF housing for optimal placement

Owner's manual

KRK S8.4 8" Powered Studio Subwoofer User Manual

Product specs

Brand KRK
Model S8.4 8" Active Studio Monitor Subwoofer
Finish Black
Year 2021
Categories Studio Monitors
Amplification Active
Electronics Solid State

FAQs

What is the frequency range of the KRK S8.4 8" Powered Studio Subwoofer?

The KRK S8.4 subwoofer offers a frequency response that extends down to 35Hz, providing deep and accurate bass extension suitable for enhancing studio monitoring systems.

Is the KRK S8.4 subwoofer suitable for small home studios?

Yes, the KRK S8.4 is well-suited for small to medium-sized home studios, offering powerful bass response without overwhelming the space, thanks to its compact 8" design.

How does the KRK S8.4 integrate with existing studio monitors?

The KRK S8.4 seamlessly integrates with studio monitors, offering adjustable crossover settings to match the frequency response of your main speakers, ensuring a balanced overall sound.

What type of amplifier is used in the KRK S8.4 subwoofer?

The KRK S8.4 features a Class-D amplifier, which provides efficient power delivery and enhanced transient response for tight and controlled bass performance.

Does the KRK S8.4 subwoofer have adjustable settings?

Yes, the KRK S8.4 includes adjustable crossover and phase controls, allowing you to customize the subwoofer's integration with your room acoustics and existing speakers for optimal sound quality.

Tec Raven

Tec Raven

KRK S8.4 Subwoofer review

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KRK S8.4 Subwoofer review

Tec Raven

Tec Raven

Video thumbnail for Test loa KRK ROKIT 5G4 + Sub KRK S8.4 + XDJ XZ tại Shop Thành KRK by Shop Thành KRK

Test loa KRK ROKIT 5G4 + Sub KRK S8.4 + XDJ XZ tại Shop Thành KRK

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Shop Thành KRK

Video thumbnail for KRK S8.4 Studio Subwoofer Review | Bax Music by Bax-shop | Bax Music Goes

KRK S8.4 Studio Subwoofer Review | Bax Music

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Bax-shop | Bax Music Goes

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Loa Sub KRK S8.4 đời mới 2022

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Shop Thành KRK

Reviews

PROS

  • Compact size fits perfectly in small to medium rooms

  • Multiple inputs with selectable crossover frequencies for versatility

  • Tight, punchy lows without port noise or resonances

  • Sturdy build quality and solid construction

  • Standby mode activates quickly, conserving energy

  • Optional foot switch for convenient crossover bypass

  • Enhances clarity and depth when paired with studio monitors

  • Accurate bass response even at low volumes

CONS

  • Bass not as clean as some higher-end models

  • Heavier and taller than expected, may require additional space

  • Packaging can be prone to damage during shipping

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about KRK S8.4 8" Powered Studio Subwoofer.

Setup and maintenance

  • The KRK S8.4 subwoofer's crossover should be set at the -3dB point of the frequency response curve for optimal blending with Rokit 5 monitors, around 55 Hz.

    Source
  • If only the subwoofer crossover is adjustable, set it to the rated low end of the front speakers, e.g., 50-55 Hz for Rokit 5.

    Source
  • It’s suggested that RCA connections are less emphasized in the manual because professional monitors typically use XLR or TRS inputs, though RCA still functions correctly.

    Source

Use cases and applications

  • The subwoofer is suitable for video editing and sound mixing rather than tone or frequency mixing due to its decent bass response.

    Source
  • Owners find the KRK S8.4 subwoofer powerful enough for home studios and even house parties, requiring only low volume settings to prevent bass from overpowering.

    Source

Features and functionality

  • KRK S8.4 is rated to extend bass down to 34.5 Hz, though this is considered optimistic by users and not true sub-bass which is below 30 Hz.

    Source
  • The RCA outputs on the KRK S8.4 are confirmed to be affected by the high-pass filter despite unclear manual instructions.

    Source

User experience

  • Owners suggest that the bass response and crossover settings need personal tweaking to achieve the desired balance due to room acoustics.

    Source

Critic Reviews

KRK S8.4 Subwoofer REVIEW | Performer Mag

performermag.com

For those seeking robust low-end, the KRK S8.4 delivers with impressive clarity and a solid build. Its ability to generate bass down to 30Hz is a game changer, enhancing the listening experience significantly. With user-friendly controls and the convenience of a bypass footswitch, it allows seamless integration into any setup. However, the absence of the footswitch in the package is a notable drawback. Overall, it's a compelling choice for producers looking to feel their music, making it hard to return after testing. Highly recommended for bass enthusiasts!

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Artist usage

Add artist
See how Claudio Cueni uses KRK S8.4 8" Powered Studio Subwoofer

Claudio Cueni

Keyboardist, Music Producer

...
Verified via krkmusic

According to his artist page on the official KRK website, Claudio Cueni uses the KRK S8.4 8" Powered Studio Subwoofer.

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use KRK S8.4 8" Powered Studio Subwoofer, it is most commonly used with the following gear.

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