Phoenix Gold RX112

12″ subwoofer · 4 Ω · 200 W RMS

Fs 28.5 HzQts 0.52Vas 2.21 ft³Xmax 0.49″

Recommended box

For a sedan, one sub, 200 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 volume1.59 ft³ (45 L)
Qtc0.80
Fc44 Hz
F3 (−3 dB, no cabin gain)42 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/16″
Open sealed box in designer

Ported

Net volume3.00 ft³ (85 L)
Tuning (Fb)29 Hz
Portslot 1 9/16 × 14 5/16″, 20″ long
Port velocity at 200 W51 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28.5 Hz
Qts0.52
Qes0.601
Qms3.7
Vas2.21 ft³
Re3.5 Ω
Sd77.5 in²
Xmax0.49″
Vd38.1 in³ calc.
Mms176 g calc.
BL13.6 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m85.8 dB calc.

General

Size12″
Voice coils4 Ω
RMS power200 W

Mounting dimensions

Ø≈ 12 5/16″cutout Ø11 1/8″mounting depth 5 11/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/8″
Mounting depth5 11/16″

“≈” 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 Phoenix Gold 12″ models