KRK S8.4 Powered Studio Subwoofer

Add tight, controlled low-end to your studio with the KRK S8.4 powered studio subwoofer. Designed for music production, mixing, mastering, sound design and critical listening, the S8.4 combines an 8-inch glass aramid composite woofer with 109 watts of Class-D amplification to deliver powerful, accurate bass from a compact enclosure.

The KRK S8.4 extends your monitoring system into the lower frequencies, with bass extension down to 29 Hz and a maximum peak SPL of 112.8 dB. Its four-position selectable crossover makes it easy to integrate with KRK studio monitors or other powered monitors, while XLR, 1/4-inch TRS and RCA inputs and outputs provide flexible connectivity.

Accurate Low-Frequency Monitoring

A subwoofer should do more than simply add bass—it should help you hear what is actually happening in your mix. The S8.4 features a custom-voiced 8-inch glass aramid composite woofer designed for tight, defined low-frequency reproduction.

The front-firing bass port is engineered to provide low-frequency extension while helping reduce boundary coupling, making the S8.4 a practical choice for studio environments where space and placement matter.

Powerful Class-D Amplification

The S8.4's lightweight 109-watt Class-D amplifier provides fast transient response, control and punch while keeping the subwoofer relatively compact. The result is deep, controlled low end that complements your existing studio monitors rather than simply overwhelming them.

Easy Studio Monitor Integration

The S8.4 features a four-position selectable crossover so you can tailor the subwoofer to your monitoring system. Its universal connectivity includes:

• XLR left/right inputs and outputs
• 1/4-inch TRS left/right inputs and outputs
• RCA left/right inputs and outputs
• Polarity control
• Input sensitivity control
• Ground lift
• Optional footswitch connection

The subwoofer's monitor outputs can be high-passed according to the selected crossover setting, helping create a more integrated monitoring system.

Bypass Control for Mixing

When mixing, it's useful to hear your work with and without extended low-frequency monitoring. The S8.4 includes a footswitch connection for subwoofer bypass, allowing you to disable the subwoofer and crossover filter and quickly return your monitors to full-range operation. The footswitch is optional and not included.

Built for the Studio

The S8.4 uses a reinforced MDF enclosure with a lower-profile design, front-firing port and EVA isolation pad. Its compact footprint makes it well suited to home studios, project studios and professional production environments.

Whether you're producing music, mixing tracks, mastering, designing sound or simply want a more complete monitoring system, the KRK S8.4 gives you greater access to the low-frequency information that smaller studio monitors may not reproduce on their own.

The KRK S8.4 is an 8-inch powered studio subwoofer for producers, engineers, musicians and audio professionals who want deeper, more controlled low-frequency monitoring without taking up the space of a larger studio subwoofer.

Key Features

• 8-inch glass aramid composite woofer
• 109 watts continuous Class-D amplification
• Bass extension down to 29 Hz
• 112.8 dB maximum peak SPL
• Four-position selectable crossover
• XLR, 1/4-inch TRS and RCA inputs and outputs
• Polarity and input sensitivity controls
• Ground lift switch
• Front-firing bass port
• Optional footswitch bypass control
• Reinforced MDF enclosure
• Suitable for music production, mixing, mastering, sound design and critical listening

Specifications

KRK S8.4

Specification	Details
System Type	Active powered subwoofer
Configuration	Front-loaded, vented subwoofer
Woofer	8" glass aramid composite
Frequency Response	34.5 Hz – 133 Hz
Bass Extension	29 Hz
Maximum Peak SPL	112.8 dB
Amplifier	Class D
Power Output	109 W
Inputs	XLR L/R, 1/4" TRS L/R, RCA L/R
Outputs	XLR L/R, 1/4" TRS L/R, RCA L/R
Crossover	Four-position selectable
Footswitch	Optional
Dimensions	279 × 410 × 292 mm
Weight	12 kg