Polk Audio db104
10″ subwoofer · 4 Ω · 270 W RMS
| 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, 270 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| Bass character (Qtc) | Tight and punchy · 0.80 |
|---|---|
| Fc | 52 Hz |
| F3 (−3 dB, no cabin gain) | 49 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 15 1/2″ |
Ported
deeper, louder| Tuning (Fb) | 38 Hz |
|---|---|
| Port | 2 round ports Ø2 1/2″, 19 1/16″ long |
| Port velocity at 270 W | 78 ft/s |
| F3 (−3 dB, no cabin gain) | 36 Hz |
| Example box (outside) | 21 7/8″ × 15 3/4″ × 7 7/8″ |
Deeper: 2.08 ft³ (59 L) tuned to 31 Hz, 31 1/2″ × 15 3/4″ × 11 15/16″ outside — a bigger box with flatter deep bass. Open in the calculator
Projects with this subwoofer
Boxes that users designed and published: plans, cut sheet and response graph.
Thiele/Small parameters
| Size | 10″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 270 W |
| Fs | 37 Hz |
| Qts | 0.57 |
| Qes | 0.62 |
| Qms | 7 |
| Vas | 0.85 ft³ |
| Re | 3.25 Ω |
|---|---|
| Sd | 54.3 in² |
| Xmax | 0.30″ |
| Vd | 16 in³ calc. |
| Mms | 134 g calc. |
| BL | 12.8 T·m calc. |
| EBP | 60 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 84.9 dB calc. |
Mounting dimensions
| Cutout diameter | 9 1/16″ |
|---|---|
| Mounting depth | 5 1/2″ |
“≈” 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/20050302095619/http://www.polkaudio.com:80/downloads/manuals
- web.archive.org/web/20121103010421/http://www.polkaudio.com/downloads/manual/DBS
Other Polk Audio 10″ models
- Polk Audio db104DVC 10″ · dual 4 Ω
- Polk Audio db1040 10″ · 4 Ω
- Polk Audio db1040DVC 10″ · dual 4 Ω
- Polk Audio dX10-4 10″ · 4 Ω
- Polk Audio dX10-8 10″ · 8 Ω
- Polk Audio DXi104 DVC 10″ · dual 4 Ω
- Polk Audio DXi104 SVC 10″ · 4 Ω
- Polk Audio EX10 (EX Series II) 10″ · 4 Ω
- Polk Audio GXR104 10″ · 4 Ω
- Polk Audio MM100-4 10″ · 4 Ω
- Polk Audio MM104 (Polk/MOMO) 10″ · 4 Ω
- Polk Audio MM1040 10″ · 4 Ω
Similar 10″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Kicker CompVT 10" 2-Ohm SVC (43CVT102) 0.92 ft³ sealed · 0.92 ft³ ported
- AMPIRE FLAT10 0.74 ft³ sealed · 0.85 ft³ ported
- Soundstream PCW-10 0.74 ft³ sealed · 0.85 ft³ ported
- Swat MAS-10 1.09 ft³ sealed · 0.85 ft³ ported
- Rockville W10K5S2 0.99 ft³ sealed · 1.27 ft³ ported
- CT Sounds BIO-10 D2 0.74 ft³ sealed · 0.74 ft³ ported
FAQ
What box does the Polk Audio db104 need?
Recommended net volume: 0.88 ft³ sealed, 0.88 ft³ ported tuned to 38 Hz — for one sub in a sedan at 270 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Polk Audio db104 Thiele/Small specs?
Fs 37 Hz, Qts 0.57, Vas 0.85 ft³, Xmax 0.30″, Sd 54.3 in².
What is the Polk Audio db104 mounting depth?
Mounting depth is 5 1/2″, cutout diameter 9 1/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Polk Audio db104 handle and how do I wire it?
RMS power rating: 270 W. Wiring for several subs and amp power — in the wiring calculator.