About the Sony XS-GSW121D
Advanced materials
Advanced materials

Sony created their GS Series subwoofers with performance in mind. The Sony XS-GS121D 12" subwoofer features a unique mica-reinforced cellular glass fiber material that's foamed in a honeycomb fiber base, making it 10 times more rigid than a polypropylene cone. Sony formulated a surface layer for the cone that's made up of mica flake, synthetic fiber, and pulp. creating an extremely light and rigid cone that's able to move faster and more accurately. You'll hear greater precision and lower distortion, and the dual 4-ohm voice coils allow this speaker to run at 2 ohms for even greater firepower.
Serious power handling for this price range
A rugged rubber surround helps this Sony sub handle up to 520 watts RMS, while a double-layered spider supports the voice coil for a 55% increase in cone travel over last year's model. The GS-121D is equally at home in a ported or sealed enclosure, so you can choose the sound you want for your system. And best of all, Sony backs up these workhorse subs with a cool 3-year warranty. If you've got the room, Sony's got the boom.
Product highlights:
- 12" subwoofer with dual 4-ohm voice coils
- mica reinforced cellular glass fiber cone with honeycomb internal matrix
- rubber surround
- power handling: 520 watts RMS (260 watts per coil)
- frequency response: 20-600 Hz
- sensitivity: 84 dB
- top-mount depth: 5-5/8"
- grille not included
- warranty: 3 years
- Our 60-day money-back guarantee
- MFR # XSGSW121D
What's in the box:
Sony XS-GSW121D owner's manual
- One 12" Dual 4-ohm voice coil woofer
- Plastic trim ring
- Adhesive backed foam gasket
- Eight 1-1/4" Self-tapping screws
- Instructions (multiple languages)
- Warranty information
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More details on the Sony XS-GSW121D

Features & specs
Size | 12 -inch | |
Impedance | 2 ohms | |
Cone Material | Mica Reinforced Glass | |
Surround Material | Rubber | |
Ideal Sealed Box Volume (cubic feet) | 0.84 | |
Ideal Ported Box Volume (cubic feet) | 1.37 | |
Port diameter (inches) | 4 | |
Port length (inches) | 11.875 | |
Free-Air | No | |
Dual Voice Coil | Yes | |
Sensitivity |
84 dB at 1 watt | |
Frequency Response | 20 - 600 Hz | |
Max RMS Power Handling | 520 | |
Peak Power Handling (Watts) | 2000 | |
Top Mount Depth (inches) | 5 9/16 | |
Bottom Mount Depth (inches) | 5 13/16 | |
Cutout Diameter or Length (inches) | 10 15/16 | |
Vas (liters) | 51 | |
Fs (Hz) | 32 | |
Qts | 0.64 | |
Xmax (millimeters) | 8.9 | |
Parts Warranty | 3 Years | |
Labor Warranty | 3 Years |
Product Research
Features
Cone: The xs-GSW121D uses a honeycomb design MRC cone (Mica Reinforced Cellular glass fiber composite) to reduce weight and increase rigidity, delivering deep bass response.
Dual Voice Coils: For increased system flexibility, the woofer has two 4Ω voice coils. When the voice coils are wired in parallel, the woofer presents a 2Ω load. When the voice coils are wired in series, the woofer presents an 8Ω load.
Binding Posts: The binding post wire terminals will accept pin connectors, spade lugs, single banana plugs, and bare wire up to 10 gauge. The binding posts are spaced too close together to accept dual banana plugs.
Enclosure Compatibility: The xs-GSW121D is compatible with either a sealed or ported enclosure.
- Sealed Box Volume: The ideal sealed box volume is 0.84 ft³.
- Ported Box Volume: The ideal ported box volume is 1.37 ft³ with a 4" diameter and 11-7/8" long port.
Specification Note: Sony's rated power spec for the xs-GSW121D is 420 watts (derived using IEC 60268-5 standards). In the manual they also list the CEA 2031 compliant RMS power as 520 watts. We've adopted the 520 watt RMS rating because CEA 2031 is the more common rating system.
Trim Ring: If the sub is mounted without the cosmetic trim ring, the flange height is 0.241" and the mounting height is 0.6" (top mount).
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