Sony XS-W122ES

12″ subwoofer · 2 Ω · 500 W RMS

Fs 35.3 HzQts 0.73Vas 1.25 ft³Xmax 0.30″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 500 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume1.80 ft³ (51 L)
Qtc0.95
Fc46 Hz
F3 (−3 dB, no cabin gain)38 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/16″
Open sealed box in designer

Ported

Net volume3.04 ft³ (86 L)
Tuning (Fb)31 Hz
Portslot 2 3/16 × 14 5/16″, 23 13/16″ long
Port velocity at 500 W65 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.3 Hz
Qts0.73
Qes0.8
Qms8.88
Vas1.25 ft³
Re2.73 Ω
Sd78.5 in²
Xmax0.30″
Vd23.8 in³ calc.
Mms209 g calc.
BL12.6 T·m calc.
EBP44 — suits sealed calc.
Sensitivity, 1 W / 1 m84.9 dB calc.

General

Size12″
Voice coils2 Ω
RMS power500 W

Mounting dimensions

Ø12 3/4″cutout Ø11 1/8″mounting depth 5 7/8″magnet Ø≈ 7 3/16″
Cutout diameter11 1/8″
Mounting depth5 7/8″
Overall diameter12 3/4″

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other Sony 12″ models