SPL Dynamics PRO-250D2

10″ subwoofer · dual 2 Ω · 500 W RMS

47 HzFs, resonance

0.62Qts

0.37 ft³Vas

0.51″Xmax

500 WRMS

Source	web.archive.org · manufacturer data
Checked against source	October 2026
Thiele/Small parameters	complete
Mounting dimensions	2 of 4 — missing: frame outer diameter, magnet diameter; the designer will use an estimate

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

smaller, tighter

0.57 ft³ (16 L)

Net volume

Bass character (Qtc)	Tight and punchy · 0.80
Fc	60 Hz
F3 (−3 dB, no cabin gain)	56 Hz
Example box (outside)	12 5/8″ × 12 5/8″ × 10 1/8″

Open sealed box in designer

Ported

deeper, louder

0.85 ft³ (24 L)

Net volume

Tuning (Fb)	38 Hz
Port	slot 1 3/16 × 14 5/16″, 33 9/16″ long
Port velocity at 500 W	71 ft/s
F3 (−3 dB, no cabin gain)	33 Hz
Example box (outside)	15 13/16″ × 15 3/4″ × 13 3/16″

Open ported box in designer

Deeper: 1.45 ft³ (41 L) tuned to 33 Hz, 31 1/2″ × 15 3/4″ × 10 1/2″ outside — a bigger box with flatter deep bass. Open in the calculator

Where to buy Amazon

Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Size	10″
Voice coils	dual 2 Ω
RMS power	500 W
Fs	47 Hz
Qts	0.62
Qes	0.688
Qms	6.65
Vas	0.37 ft³

Re (one coil)	1.7 Ω
Sd	53.8 in²
Xmax	0.51″
Vd	27.5 in³ calc.
Mms	186 g calc.
BL	11.7 T·m calc.
EBP	68 — sealed or ported calc.
Sensitivity, 1 W / 1 m	84 dB calc.

Mounting dimensions

Cutout diameter	9 5/16″
Mounting depth	5 7/8″

“≈” 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

web.archive.org/web/20070711001056/http://www.spldynamics.fi:80/pro-sub/pro-250d

Other SPL Dynamics 10″ models

SPL Dynamics PRO-10D2 MK3 10″ · dual 2 Ω
SPL Dynamics PRO-10D2 MK4 10″ · dual 2 Ω
SPL Dynamics PRO-10D4 MK3 10″ · dual 4 Ω
SPL Dynamics PRO-10D4 MK4 10″ · dual 4 Ω
SPL Dynamics SW-250D2 10″ · dual 2 Ω
SPL Dynamics V-10S 10″ · 4 Ω
SPL Dynamics V-10S4 10″ · 4 Ω
SPL Dynamics V-250D2 10″ · dual 2 Ω
SPL Dynamics V-250D4 10″ · dual 4 Ω
SPL Dynamics V-250S4 10″ · 4 Ω
SPL Dynamics XTR-250D2 10″ · dual 2 Ω
SPL Dynamics XTR-250D4 10″ · dual 4 Ω

Similar 10″ subwoofers from other brands

Close in Fs, Qts and Vas — a box of similar volume will suit them.

Rockford Fosgate Punch P3SD210 (Shallow, 2007) 0.74 ft³ sealed · 0.78 ft³ ported
Skar Audio SVR-10 D2 0.46 ft³ sealed · 1.59 ft³ ported
Massive Audio GTX102 0.67 ft³ sealed · 0.81 ft³ ported
Skar Audio SVR-10 D4 0.46 ft³ sealed · 1.59 ft³ ported
Quantum Audio QWX4000/10D4 0.67 ft³ sealed · 0.78 ft³ ported
DC Audio Level 4 10 D1 0.49 ft³ sealed · 0.85 ft³ ported

FAQ

What box does the SPL Dynamics PRO-250D2 need?

Recommended net volume: 0.57 ft³ sealed, 0.85 ft³ ported tuned to 38 Hz — for one sub in a sedan at 500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the SPL Dynamics PRO-250D2 Thiele/Small specs?

Fs 47 Hz, Qts 0.62, Vas 0.37 ft³, Xmax 0.51″, Sd 53.8 in².

What is the SPL Dynamics PRO-250D2 mounting depth?

Mounting depth is 5 7/8″, cutout diameter 9 5/16″. The inside depth of the box must exceed the mounting depth by at least 1″.

How much power does the SPL Dynamics PRO-250D2 handle and how do I wire it?

RMS power rating: 500 W. Dual 2 Ω voice coils: series gives 4 Ω, parallel gives 1 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.