KRK S12.4

KRK S12.4



Powered Studio Subwoofer

The S12.4 powered studio subwoofer builds upon KRK’s legacy for sonic accuracy and stellar performance. The custom-made, Kevlar® woofer delivers ultra-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 S12.4 with KRK or another studio monitor delivers an optimized listening and mixing experience with extended low end, while the exclusive bypass-control feature provides full range audio to the monitors without switching off the subwoofer. The powerful S12.4 subwoofer doesn’t just deliver precise, ultra-low bass and a rich feature set: it’s the next dimension in subwoofer performance.

Bypass Footswitch

Mix with confidence. The bypass footswitch control allows you to quickly mute the sub and send full-range audio to your recording monitors.

Heavy Duty Enclosure

KRK Subwoofers feature reinforced MDF enclosures for maximum strength and durability. Never let a spilled beer or wild ninja roundhouse kick stop your mixing session again.

Front-firing Port

We engineered the front port to provide low frequency extension while reducing boundary coupling. The unique shape is optimized to avoid port turbulence.

S12.4 Features

  • 12" Kevlar® Composite Woofer

  • Bass extension to 23Hz with a max SPL of 119.9 dB

  • 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

Technical Specs


Front Loaded, Vented Subwoofer

System Type

Active Subwoofer


12" Kevlar® Aramid Composite Woofer

Frequency Response

26Hz - 97Hz

Max Peak SPL

119.9 dB


Class D

Power Output (Continous)

220 Watts @ 1% THD+N @ 44Hz

Signal to Noise Ratio

92 dB

Amplifier Distortion (THD + N)

≤ 0.3% @-3dB Of Max Power Output 29Hz-97Hz

Input Impedance

9.4 KΩ Balanced, 9.2 KΩ Unbalanced

Ground Lift


HPF Bypass

With Footswitch Only





Input Connectors

XLR L/R, 1/4" TRS L/R, RCA L/R, 1/4" Footswitch

LFE Input

Balanced TRS

Output Connectors

XLR L/R, 1/4" TRS L/R, RCA L/R

AC Power Input

Selectable 110V-120V / 220V0240V


18mm Reinforced MDF


Black Vinyl Wrap, Baffle - Black Paint


EVA Isolation Pad

Dimensions (H x W x D)

(H x W x D): 16.375" (416 mm) x 23.875" (606 mm) x 14.375" (365 mm)


62.5 Lb. (28.3 kg.)