Full Specifications & Features


Size & Weight

5,500 g

Speaker System

Single Voice Coil
12" (30 cm)

General Features

Peak Power
2000 W
RMS Power
500 W
Rated Power
400 W
Effective Frequency Range
25-700 Hz
Output Sound Pressure
83 dB ±2dB SPL (1W,1m)
Impedance (ohms)
Diaphragm Material
Lightweight Rigid Cellular Honeycomb
Magnet Material
Surround Material
Rubber (Separated Notch)

What's In The Box

  • Detachable Gasket


Close-up of the MRC Honeycomb Subwoofer Diaphragm.

Lightweight Rigid Cellular Honeycomb Subwoofer Diaphragm

Lightweight Rigid Cellular(formerly known as MRC) diaphragm material is further enhanced via a honeycomb fibre structure, for unmatched rigidity and responsiveness. Enhancements over the years of diaphragm material development produced a driver 10x more rigid than conventional PP Matrix cones, for natural low-distortion sound and a wide frequency response.

Close-up of the Separated Notch Edge Surround.

Separated Notch Edge Surround

The woofer surround features another proprietary Sony technology with distinctive curved notches improving the vertical amplitude symmetry, for dramatically reduced distortion and enhanced clarity.

Close-up of the Progressive Height Rate Spider.

Progressive Height Rate Spider

The acoustically-optimised spider allows for higher power handling and airflow, with a profile designed for more rapid and precise cushioning of the speaker cone. To increase signal integrity and prevent sound interference, the lead wire from the voice coil is also sewn to the spider, reducing wire movement.

Back view of the XS-W124ES 12" (30cm) Mobile ES 4-ohm MRC Honeycomb Subwoofer showing Gold-plated Input Terminals.

Gold-plated Input Terminals

Gold-plated spring terminals allow up to AWG#10 speaker cables.

Back view of the XS-W124ES 12" (30cm) Mobile ES 4-ohm MRC Honeycomb Subwoofer showing the Dynamic Air Diffuser.

Five-beam Frame Structure & Dynamic Air Diffuser

The Five-beam Frame design disperses resonance while the integrated Dynamic Air Diffuser ensures efficient air circulation for smooth cone travel and cooling of the voice coil.