KRK S10.4 S10 Generation 4 10ft Powered Studio Subwoofer - Tight, Deep

Our review of the KRK S10.4 makes clear who should consider this subwoofer: engineers, producers and home studio owners who need precise, extendable low end without sacrificing transient control. The S10.4 delivers a 10' glass-aramid woofer and Class D amplification that combine for a punchy, tight bass response down to 28Hz and a claimed max SPL of 117 dB. That combination makes it a practical choice for mixing electronic, rock and heavy music where bass clarity and impact below 60Hz matter most, while preserving full-range accuracy for monitor pairing.

Key Features

• 10' glass-aramid woofer: Provides tight, defined low frequencies that translate mixes with accuracy and controlled punch.
• Bass extension to 28Hz: Reaches deep sub-bass for electronic and cinematic material, letting engineers hear energy below the usual monitor range.
• 117 dB max SPL: Delivers plenty of level for nearfield and small-room monitoring without immediate distortion at moderate volumes.
• Selectable four-position crossover: Makes it simple to match the subwoofer crossover to a variety of studio monitors for a coherent low end.
• Footswitch control (footswitch not included): Lets users engage or bypass the sub and crossover quickly while keeping the sub powered for convenience during sessions.
• Curved front-firing port and lightweight Class D amp: Offer flexible placement in rooms and responsive transient control without excessive weight.

Who It's For

The S10.4 is best for mixing engineers and producers working in small to medium project studios who need an authoritative sub that integrates with existing nearfield monitors. Its pairing ability and selectable crossover are particularly useful when combining it with different monitor sizes and voicings.

It is less suitable for users who cannot accommodate a larger, heavier subwoofer in tight spaces or those seeking ultra-compact reference monitors; customers who prioritize portability over low-frequency extension should look at smaller bass management options instead.

Pros & Cons

Pros

• Sound quality is frequently praised for being powerful and accurate, with extra punch under 60 Hz that helps heavy music mixes.
• Value for money: the combination of a custom glass-aramid driver and Class D amplification gives professional features without premium pricing.
• Selectable crossover and bypass-control provide flexible integration with different monitor setups for focused mixing.
• Curved front-firing port allows placement options close to walls while maintaining low-end output.

Cons

• Size and weight are noted concerns by some customers, making it less ideal for very small rooms or frequent transport.
• Footswitch is convenient but not included, so adding that accessory is an extra cost for hands-free control.

Specifications

Woofer	10' glass-aramid composite
Bass extension	Down to 28Hz
Maximum SPL	117 dB
Amplification	Powerful, lightweight Class D
Crossover	Four-position selectable crossover
Controls	Bypass-control with footswitch enable/disable (footswitch not included)
Design	Curved cabinet with front-firing bass port

Our Verdict

The KRK S10.4 is a strong choice for studio owners who need deep, controlled low end and flexible integration with their monitors. Its combination of a custom-voiced glass-aramid woofer, selectable crossover and Class D power delivers professional-sounding bass and good value, though the physical size and missing footswitch accessory are reasonable trade-offs to consider.

Frequently Asked Questions

Can the S10.4 reach very low sub-bass?
The subwoofer extends down to 28Hz, giving audible sub-bass that supports electronic and cinematic material.

Does it include a footswitch for bypass control?
No, the footswitch is not included; the unit supports footswitch control but the accessory must be purchased separately.

Will it pair with different studio monitors?
Yes, the four-position selectable crossover is designed to make matching with KRK or other monitors straightforward for cohesive low-frequency blending.