Vibe Audio Slick 8 D2 (SLICK8D2-V3)
8″ subwoofer · dual 2 Ω · 450 W RMS
The Vibe Audio Slick 8 D2 (SLICK8D2-V3) is a 8″ subwoofer. With Qts 0.46 and EBP 75 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder.
| Source | vibeaudio.co.uk · 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, 450 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) | Flat and accurate · 0.66 |
|---|---|
| Fc | 59 Hz |
| F3 (−3 dB, no cabin gain) | 66 Hz |
| Example box (outside) | 10 1/4″ × 10 1/4″ × 8 1/2″ |
Ported
deeper, louder| Tuning (Fb) | 41 Hz |
|---|---|
| Port | slot 1 15/16 × 14 5/16″, 86 3/8″ long |
| Port velocity at 450 W | 31 ft/s |
| F3 (−3 dB, no cabin gain) | 37 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 10 1/16″ |
The volume and tuning are the recommendation, but the port doesn’t fit this example box. Size the box and port in the designer.
Open ported box in designerDeeper: 0.60 ft³ (17 L) tuned to 43 Hz, 15 1/8″ × 15 3/4″ × 7 5/16″ 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 | 8″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 450 W |
| Fs | 41.5 Hz |
| Qts | 0.46 |
| Qes | 0.554 |
| Qms | 2.89 |
| Vas | 0.29 ft³ |
| Re (one coil) | 1.7 Ω |
|---|---|
| Sd | 31 in² |
| Xmax | 0.35″ |
| Vd | 11 in³ calc. |
| Mms | 102 g calc. |
| BL | 9 T·m calc. |
| EBP | 75 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 82.3 dB calc. |
Mounting dimensions
| Cutout diameter | 7 1/8″ |
|---|---|
| Mounting depth | 4 3/4″ |
| Overall diameter | 7 7/8″ |
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 and ported box
- Polaris RZR / Ranger — under the seat sealed and ported box
- Can-Am — under the seat sealed and ported box
- Avalanche — under the rear seat sealed and ported 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
Judging by its value, the published Re is for both coils in series — converted to per coil.
“≈” 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
- vibeaudio.co.uk/wp-content/uploads/2025/11/Slick-V3-subwoofer-manual-010425.pdf
- vibeaudio.co.uk/wp-content/uploads/2023/10/Slick-V3-subwoofer-manual-010425.pdf
Other Vibe Audio 8″ models
- Vibe Audio Slick 8 D2 (SLICK8D2-V0) 8″ · dual 2 Ω
Similar 8″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Sundown Audio HZ-8 D4 0.28 ft³ sealed · 0.49 ft³ ported
- Helix IQ W8-DVC2 (2x2 Ohm) 0.32 ft³ sealed · 0.57 ft³ ported
- CT Sounds TROPO-8 D4 0.28 ft³ sealed · 0.42 ft³ ported
- Sundown Audio SML-8 D2 0.32 ft³ sealed · 0.53 ft³ ported
- Zetta Audio M-8 450 0.28 ft³ sealed · 0.49 ft³ ported
- Bomber Bicho Papão 600W 4 Ohm (SW8BP600-4) 0.28 ft³ sealed · 0.71 ft³ ported
All 8″ subwoofers in our database →
FAQ
What box does the Vibe Audio Slick 8 D2 (SLICK8D2-V3) need?
Recommended net volume: 0.28 ft³ sealed, 0.49 ft³ ported tuned to 41 Hz — for one sub in a sedan at 450 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Vibe Audio Slick 8 D2 (SLICK8D2-V3) Thiele/Small specs?
Fs 41.5 Hz, Qts 0.46, Vas 0.29 ft³, Xmax 0.35″, Sd 31 in².
What is the Vibe Audio Slick 8 D2 (SLICK8D2-V3) mounting depth?
Mounting depth is 4 3/4″, cutout diameter 7 1/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Vibe Audio Slick 8 D2 (SLICK8D2-V3) handle and how do I wire it?
RMS power rating: 450 W. Dual 2 Ω voice coils: series gives 4 Ω, parallel gives 1 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.
Is the Vibe Audio Slick 8 D2 (SLICK8D2-V3) better sealed or ported?
EBP 75: both work — sealed 0.28 ft³ is tighter and smaller, ported 0.49 ft³ tuned to 41 Hz is deeper and louder.
What port does the Vibe Audio Slick 8 D2 (SLICK8D2-V3) need?
For the 0.49 ft³ ported box tuned to 41 Hz: slot 1 15/16 × 14 5/16″, 86 3/8″ long, area 28.2 in²; or a round port Ø6″, ≈ 86 3/8″ long. Port air speed at 450 W: 31 ft/s.
What box do two Vibe Audio Slick 8 D2 (SLICK8D2-V3) subs need?
Two subs need twice the volume: 0.57 ft³ sealed, or 0.99 ft³ ported at the same 41 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.