Polk Audio db104DVC
10″ subwoofer · dual 4 Ω · 270 W RMS
The Polk Audio db104DVC is a 10″ subwoofer. With Qts 0.52 and EBP 65 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Modest excursion (Xmax 0.35″) — for clean sound at moderate levels, not for SPL competitions.
| 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 | 57 Hz |
| F3 (−3 dB, no cabin gain) | 54 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 11 13/16″ |
Ported
deeper, louder| Tuning (Fb) | 38 Hz |
|---|---|
| Port | 2 round ports Ø2 1/2″, 19 1/16″ long |
| Port velocity at 270 W | 79 ft/s |
| F3 (−3 dB, no cabin gain) | 36 Hz |
| Example box (outside) | 21 7/8″ × 15 3/4″ × 7 7/8″ |
Deeper: 1.94 ft³ (55 L) tuned to 31 Hz, 31 1/2″ × 15 3/4″ × 11 1/2″ 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 | dual 4 Ω |
| RMS power | 270 W |
| Fs | 37 Hz |
| Qts | 0.52 |
| Qes | 0.57 |
| Qms | 6.07 |
| Vas | 0.85 ft³ |
| Re (one coil) | 3.25 Ω |
|---|---|
| Sd | 54.3 in² |
| Xmax | 0.35″ |
| Vd | 19.2 in³ calc. |
| Mms | 134 g calc. |
| BL | 13.3 T·m calc. |
| EBP | 65 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 85.3 dB calc. |
Mounting dimensions
| Cutout diameter | 9 1/16″ |
|---|---|
| Mounting depth | 5 1/2″ |
Where it fits in a vehicle
Spots from our vehicle guides where the cutout, mounting depth and recommended box fit. The spot sizes are approximate — measure your own vehicle.
- F-150 SuperCrew — under the rear seat sealed and ported box
- Ram Crew Cab — under the rear seat sealed and ported box
- Tacoma Double Cab — under the rear seat sealed and ported box
- Tacoma Access Cab — behind the front seats sealed and ported box
- Bronco 4-door — behind the rear seat sealed and ported box
- Wrangler 4-door, hard top — behind the rear seat sealed and ported box
- Wrangler 4-door, soft top — behind the rear seat sealed and ported box
- Silverado / Sierra Crew Cab — under the rear seat sealed and ported box
- Spare tire well sealed box
- Polaris RZR / Ranger — under the seat sealed box
- Can-Am — under the seat sealed box
- FJ Cruiser — behind the rear seat sealed and ported box
- El Camino 1978–87 — behind the seat sealed and ported box
- Cherokee XJ — cargo area, spare moved out sealed and ported box
- Excursion — behind the third row sealed and ported box
- Mustang 2015–2023 coupe — trunk sealed and ported box
- Challenger / Charger — trunk sealed and ported box
- Tesla Model 3 — well under the trunk floor sealed and ported box
- Club Car Precedent — under the rear seat sealed and ported box
“≈” 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 db104 10″ · 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.
- Pioneer TS-Z10LS4 0.64 ft³ sealed · 0.95 ft³ ported
- Vibe Audio Pulse 10 (PULSE10-V0) 0.78 ft³ sealed · 0.81 ft³ ported
- Vibe Audio Pulse 10 D2 (PULSE10D2-V3) 0.78 ft³ sealed · 0.81 ft³ ported
- Helix IK S10-SVC2 (1x2 Ohm) 0.60 ft³ sealed · 0.88 ft³ ported
- American Bass SL-1044 0.53 ft³ sealed · 0.85 ft³ ported
- AMPIRE FLAT10 0.74 ft³ sealed · 0.85 ft³ ported
FAQ
What box does the Polk Audio db104DVC need?
Recommended net volume: 0.64 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 db104DVC Thiele/Small specs?
Fs 37 Hz, Qts 0.52, Vas 0.85 ft³, Xmax 0.35″, Sd 54.3 in².
What is the Polk Audio db104DVC 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 db104DVC handle and how do I wire it?
RMS power rating: 270 W. Dual 4 Ω voice coils: series gives 8 Ω, parallel gives 2 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.
Is the Polk Audio db104DVC better sealed or ported?
EBP 65: both work — sealed 0.64 ft³ is tighter and smaller, ported 0.88 ft³ tuned to 38 Hz is deeper and louder.
What port does the Polk Audio db104DVC need?
For the 0.88 ft³ ported box tuned to 38 Hz: 2 round ports Ø2 1/2″, 19 1/16″ long, area 10 in²; or a round port Ø3 9/16″, ≈ 18 5/16″ long. Port air speed at 270 W: 79 ft/s.
What box do two Polk Audio db104DVC subs need?
Two subs need twice the volume: 1.27 ft³ sealed, or 1.77 ft³ ported at the same 38 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.