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DJ Tech Reviews

KRK S12.4

A 12-inch studio sub with deep, clean bass and more output than most rooms need; big and heavy at 28.3 kg.

KRK S12.4 subwoofer at an angle

Photos: KRK Systems

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Only 2 professional reviews so far, 2 recommending it4.8/5 from 17 Thomann owners

See reviews

An early read

This page rests on 2 professional reviews and 14 owner reviews, too few to be sure. It is recompiled as more reviews appear.

Best for
Producers adding deep, clean low end beneath existing studio monitors.
Skip it if
You share walls with neighbours, or need to move the sub around.

The Internet’s Opinion

From 2 professional reviews and 14 owner reviews: not much evidence yet.

Evidence is thin: two professional reviews, from DJ Times and the DuBel Air channel, test the S12.4 itself (reviews of the smaller S10.4 and S8.4 exist and are not counted), alongside 14 owner reviews. Both reviewers and the owners describe deep, powerful bass that stays clean at volume with more output than most rooms need; the recurring complaints are the cabinet's size and weight and the grille being sold separately.

2 recommend0 mixed0 avoid

What people praise

  • Deep, powerful bass that stays clean and controlled at high volume
  • Blends easily with existing KRK and Yamaha monitors
  • Connections and controls cover most setups
Show 3 more
  • More output than most rooms need
  • Solidly built MDF cabinet
  • A clear step up from smaller subs

What to know first

  • Very large and heavy at 28.3 kg, with no handles, awkward to move and place
  • Auto-standby divides owners; a rear switch turns it off
  • Not the flattest response, less precise in the deepest octave
Show 2 more
  • No grille in the boxReplaceable part
  • The thin floor pad in the box is not enough; owners add an isolation mat

Owner ratings, as the retailers publish them

See the 2 reviews behind this

2 professional reviews (2 recommend, 0 mixed, 0 avoid); 14 owner reviews read at Thomann (13) and Guitar Center (1)Compiled 2026-11-04How this is compiled

Prices

Before you buy

Released
January 2021
Status
Current

Works with

  • XLR, TRS and RCA inputsBalanced or RCA

    Stereo pairs of balanced XLR and 1/4-inch TRS inputs plus unbalanced RCA inputs, for an audio interface, mixer or DJ controller Manufacturer spec sheet (KRK (S8.4/S10.4/S12.4 user manual)), checked 2026-10-11

  • Your existing monitorsHigh-passed outputs

    XLR, TRS and RCA outputs feed a pair of monitors; the balanced XLR and TRS outputs are high-passed above the crossover, which has four positions Manufacturer spec sheet (KRK (S8.4/S10.4/S12.4 user manual)), checked 2026-10-11

  • LFE inputBalanced TRS

    A separate balanced TRS LFE input for the .1 channel of a surround system Manufacturer spec sheet (KRK), checked 2026-10-11

  • Consumer sourcesSensitivity switch

    Input sensitivity switches between Nominal, for studio gear, and High, for stereo receivers and other consumer electronics Manufacturer spec sheet (KRK (S8.4/S10.4/S12.4 user manual)), checked 2026-10-11

  • Mains voltageManual selector

    The S12.4 alone has a voltage selector (110 to 120 V or 220 to 240 V); an IEC power cord is included Manufacturer spec sheet (KRK (S8.4/S10.4/S12.4 user manual)), checked 2026-10-11

You’ll also need

  • Momentary footswitchNot in the box

    Muting the sub and sending full-range audio to the monitors needs an optional momentary footswitch, which is not included Manufacturer spec sheet (KRK (S8.4/S10.4/S12.4 user manual)), checked 2026-10-11

  • GrilleSold separately

    The grille for the S8.4, S10.4 and S12.4 is an accessory with its own installation guide Manufacturer spec sheet (KRK), checked 2026-10-11

Key specs

Configuration
Front Loaded, Vented Subwoofer
Weight
62.5 Lb. (28.3 kg.)
System Type
Active Subwoofer Performance
Crossover Frequency Response
26Hz – 97Hz
Maximum Peak SPL
119.9dB
Power Output
220 Watts @ 44Hz
All 16 specifications
Input Impedance
9.4 KΩ Balanced, 9.2 KΩ Unbalanced
HPF Bypass
With Footswitch Only
Footswitch
Optional
Indicators
Power/Standby
Input Connections
XLR L/R, 1/4″ TRS L/R, RCA inputs L/R, 1/4″ Footswitch
LFE Input
Balanced TRS
Output Connections
Footswitch Balanced XLR L/R, 1/4″ TRS L/R, RCA L/R
AC Power Input
Selectable 110V-120V / 220V-240V
Finish
Black Vinyl Wrap, Baffle – Black Paint
Dimensions (H x W x D)
16.375″ (416 mm) x 23.875″ (606 mm) x 14.375″ (365 mm)

16 of 16 figures sourced; hover one for its source

Our take

Rory TassellWritten from the sources on this page, not from a loan unit.

Evidence is thin: two professional reviews, from DJ Times and the DuBel Air channel, both recommend it, and 14 owner reviews were read. Fourteen of those sources describe deep, powerful bass that stays clean at volume, and seven owners say it blends easily with their monitors. The recurring complaints are its 28.3 kg size and weight and the grille being sold separately. Buy it if you have the floor space and a room that can take the output.

What it is

Status, October 2026: current. KRK still lists the S12.4.

What it is

The S12.4 is a powered studio subwoofer with a 12-inch woofer from KRK Systems, a Gibson brand (KRK product page). KRK announced it in January 2021 alongside the 8-inch S8.4 and 10-inch S10.4, as subwoofers to match its fourth-generation Rokit monitors such as the Rokit 5 G4 (Sound On Sound).

The woofer has a Kevlar aramid composite cone and is driven by a Class D amplifier rated at 220 W, in an 18 mm reinforced MDF cabinet with a front-firing port. KRK quotes a frequency response of 26 Hz to 97 Hz and a maximum peak SPL of 119.9 dB.

It sits between the source and a pair of monitors. Stereo inputs come on balanced XLR and 1/4" TRS and on unbalanced RCA, and a separate balanced TRS input takes the LFE channel of a surround system. Matching XLR, TRS and RCA outputs feed the monitors, and the balanced outputs are high-passed above the crossover, which has four settings (50, 60, 70 and 80 Hz, per Sound On Sound). The back panel also has volume, polarity (0 or 180 degrees), input sensitivity (Nominal for studio gear, High for consumer electronics), ground lift and an auto standby switch. An optional momentary footswitch, not included, mutes the sub and sends full-range audio to the monitors.

Unlike the S8.4 and S10.4, it has a manual mains voltage selector. It measures 416 x 606 x 365 mm (H x W x D) and weighs 28.3 kg. An IEC power cord is in the box; the grille is sold separately.

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