Dayton Audio RSS315HO-4

12″ subwoofer · 4 Ω · 700 W RMS

26.2 HzFs, resonance

0.30Qts

1.89 ft³Vas

0.48″Xmax

700 WRMS

Source	parts-express.com · manufacturer data
Checked against source	October 2026
Thiele/Small parameters	complete
Mounting dimensions	3 of 4 — missing: magnet diameter; the designer will use an estimate

Recommended box

For a sedan, one sub, 700 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

0.74 ft³ (21 L)

Net volume

Manufacturer spec: 0.49 ft³ · source

Bass character (Qtc)	Dry and tight · 0.57
Fc	49 Hz
F3 (−3 dB, no cabin gain)	67 Hz
Example box (outside)	14 3/16″ × 14 3/16″ × 10 7/16″

Open sealed box in designer

Ported

deeper, louder

1.52 ft³ (43 L)

Net volume

Manufacturer spec: 1.50 ft³ · source

Tuning (Fb)	30 Hz
Port	slot 1 3/4 × 14 5/16″, 45 1/2″ long
Port velocity at 700 W	64 ft/s
F3 (−3 dB, no cabin gain)	30 Hz
Example box (outside)	31 1/2″ × 15 3/4″ × 11 1/2″

Open ported box in designer

Deeper: 1.52 ft³ (43 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 11 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	12″
Voice coils	4 Ω
RMS power	700 W
Fs	26.2 Hz
Qts	0.30
Qes	0.33
Qms	3.63
Vas	1.89 ft³

Re	3.2 Ω
Sd	79.8 in²
Xmax	0.48″
Vd	38.6 in³ calc.
Mms	259 g calc.
BL	20.3 T·m calc.
EBP	79 — sealed or ported calc.
Sensitivity, 1 W / 1 m	86.7 dB calc.

Mounting dimensions

Cutout diameter	11 1/8″
Mounting depth	5 3/4″
Overall diameter	12 3/8″

“≈” 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

parts-express.com/Dayton-Audio-RSS315HO-4-12-Reference-Series-HO-Subwoofer-4-Ohm

Other Dayton Audio 12″ models

Dayton Audio DCS305-4 12″ · 4 Ω
Dayton Audio LS12-44 12″ · dual 4 Ω
Dayton Audio MX12-22 12″ · dual 2 Ω
Dayton Audio PCS12-4 12″ · 4 Ω
Dayton Audio RSS315HF-4 12″ · 4 Ω
Dayton Audio RSS315HFA-8 12″ · 8 Ω
Dayton Audio RSS315HO-44 12″ · dual 4 Ω
Dayton Audio SD315A-88 12″ · dual 8 Ω
Dayton Audio SS12-22 12″ · dual 2 Ω
Dayton Audio UM12-22 12″ · dual 2 Ω
Dayton Audio UMII12-22 12″ · dual 2 Ω

Similar 12″ subwoofers from other brands

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

Diamond MD12.4 (MacDaddy) 0.74 ft³ sealed · 2.40 ft³ ported
Soundstream XPRO-12 0.71 ft³ sealed · 2.26 ft³ ported
Soundstream X-Pro 12 (2009) 0.71 ft³ sealed · 2.33 ft³ ported
Pride Junior Pro 12 D2 0.67 ft³ sealed · 2.19 ft³ ported
Resilient Sounds RS 12 D4 0.71 ft³ sealed · 2.33 ft³ ported
Gladen SQX 12 Extreme (SVC 2 ohm) 0.71 ft³ sealed · 2.26 ft³ ported

FAQ

What box does the Dayton Audio RSS315HO-4 need?

Recommended net volume: 0.74 ft³ sealed, 1.52 ft³ ported tuned to 30 Hz — for one sub in a sedan at 700 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the Dayton Audio RSS315HO-4 Thiele/Small specs?

Fs 26.2 Hz, Qts 0.30, Vas 1.89 ft³, Xmax 0.48″, Sd 79.8 in².

What is the Dayton Audio RSS315HO-4 mounting depth?

Mounting depth is 5 3/4″, cutout diameter 11 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.

How much power does the Dayton Audio RSS315HO-4 handle and how do I wire it?

RMS power rating: 700 W. Wiring for several subs and amp power — in the wiring calculator.