Polk Audio GXR104
10″ subwoofer · 4 Ω · 165 W RMS
The Polk Audio GXR104 is a 10″ subwoofer. With Qts 0.49 and EBP 65 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Modest excursion (Xmax 0.24″) — 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, 165 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 · 0.84 |
|---|---|
| Fc | 58 Hz |
| F3 (−3 dB, no cabin gain) | 54 Hz |
| Example box (outside) | 12 3/16″ × 12 3/16″ × 20 11/16″ |
Ported
deeper, louder| Tuning (Fb) | 38 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 22 3/8″ long |
| Port velocity at 165 W | 34 ft/s |
| F3 (−3 dB, no cabin gain) | 39 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 5/8″ |
Deeper: 2.08 ft³ (59 L) tuned to 40 Hz, 31 1/2″ × 15 3/4″ × 11″ 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 | 165 W |
| Fs | 34.4 Hz |
| Qts | 0.49 |
| Qes | 0.53 |
| Qms | 7 |
| Vas | 2.32 ft³ |
| Re | 3.3 Ω |
|---|---|
| Sd | 53.6 in² |
| Xmax | 0.24″ |
| Vd | 12.9 in³ calc. |
| Mms | 55 g calc. |
| BL | 8.6 T·m calc. |
| EBP | 65 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 89 dB calc. |
Mounting dimensions
| Cutout diameter | 9 3/16″ |
|---|---|
| Mounting depth | 4 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
- F-150 regular cab — behind the seat sealed box
- Ram Crew Cab — under the rear seat sealed and ported box
- Ram regular cab — behind the seat sealed box
- Tacoma Double Cab — under the rear seat sealed box
- Tacoma Access Cab — behind the front seats sealed 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
- Silverado / Sierra regular cab — behind the seat sealed box
- Avalanche — under the rear 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 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
Other Polk Audio 10″ models
- Polk Audio db104 10″ · 4 Ω
- 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 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.
- Earthquake Tremor-X104 1.20 ft³ sealed · 1.55 ft³ ported
- Orion Cobalt 10 SVC (1999) 1.13 ft³ sealed · 1.48 ft³ ported
- Alpine SWE-1044E (Type-E) 1.09 ft³ sealed · 1.77 ft³ ported
- Kicker Comp 10" 8-Ohm SVC (C108) 1.31 ft³ sealed · 1.70 ft³ ported
- Brax Matrix ML10 Sub (2x2 Ohm) 1.13 ft³ sealed · 1.31 ft³ ported
- Audiobahn AW1051 0.88 ft³ sealed · 1.55 ft³ ported
FAQ
What box does the Polk Audio GXR104 need?
Recommended net volume: 1.24 ft³ sealed, 1.59 ft³ ported tuned to 38 Hz — for one sub in a sedan at 165 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Polk Audio GXR104 Thiele/Small specs?
Fs 34.4 Hz, Qts 0.49, Vas 2.32 ft³, Xmax 0.24″, Sd 53.6 in².
What is the Polk Audio GXR104 mounting depth?
Mounting depth is 4 1/2″, cutout diameter 9 3/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Polk Audio GXR104 handle and how do I wire it?
RMS power rating: 165 W. Wiring for several subs and amp power — in the wiring calculator.
Is the Polk Audio GXR104 better sealed or ported?
EBP 65: both work — sealed 1.24 ft³ is tighter and smaller, ported 1.59 ft³ tuned to 38 Hz is deeper and louder.
What port does the Polk Audio GXR104 need?
For the 1.59 ft³ ported box tuned to 38 Hz: slot 1 9/16 × 14 5/16″, 22 3/8″ long, area 22.6 in²; or a round port Ø5 3/8″, ≈ 22 3/8″ long. Port air speed at 165 W: 34 ft/s.
What box do two Polk Audio GXR104 subs need?
Two subs need twice the volume: 2.47 ft³ sealed, or 3.18 ft³ ported at the same 38 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.