Soundstream PSW.104

10″ subwoofer · 4 Ω · 250 W RMS

49.5 HzFs, resonance
1.05Qts
0.59 ft³Vas
0.39″Xmax
250 WRMS
Sourceweb.archive.org · manufacturer data
Checked against sourceOctober 2026
Thiele/Small parameterscomplete
Mounting dimensions0 of 4 — missing: cutout, mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate

Recommended box

For a sedan, one sub, 250 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
1.17 ft³ (33 L)
Net volume
Bass character (Qtc)Boomy, with a bump · 1.29
Fc61 Hz
F3 (−3 dB, no cabin gain)45 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 19 11/16″
Open sealed box in designer

Ported

deeper, louder
0.85 ft³ (24 L)
Net volume
Tuning (Fb)42 Hz
Port2 round ports Ø2 1/2″, 16″ long
Port velocity at 250 W70 ft/s
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)21 7/16″ × 15 3/4″ × 7 11/16″
Open ported box in designer

Deeper: 2.01 ft³ (57 L) tuned to 40 Hz, 31 1/2″ × 15 3/4″ × 10 3/4″ outside — a bigger box with flatter deep bass. Open in the calculator

Where to buy Amazon
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Size10″
Voice coils4 Ω
RMS power250 W
Fs49.5 Hz
Qts1.05
Qes1.201
Qms8.31
Vas0.59 ft³
Re3.2 Ω
Sd52.2 in²
Xmax0.39″
Vd20.5 in³ calc.
Mms99 g calc.
BL9.1 T·m calc.
EBP41 — suits sealed calc.
Sensitivity, 1 W / 1 m84.3 dB calc.

Mounting dimensions

Ø≈ 10 5/16″cutout ≈ Ø9 1/8″mounting depth ≈ 5 1/8″magnet Ø≈ 5 15/16″
Cutout diameter≈ 9 1/8″
Mounting depth≈ 5 1/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 52.2 in².

“≈” 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 Soundstream 10″ models

Similar 10″ subwoofers from other brands

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

FAQ

What box does the Soundstream PSW.104 need?

Recommended net volume: 1.17 ft³ sealed, 0.85 ft³ ported tuned to 42 Hz — for one sub in a sedan at 250 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the Soundstream PSW.104 Thiele/Small specs?

Fs 49.5 Hz, Qts 1.05, Vas 0.59 ft³, Xmax 0.39″, Sd 52.2 in².

How much power does the Soundstream PSW.104 handle and how do I wire it?

RMS power rating: 250 W. Wiring for several subs and amp power — in the wiring calculator.