Phoenix Gold ZX18PBS ZX Series 8 Inch Sub Slim Subwoofer Enclosure Box 200w RMS
Couldn't Load Pickup availability
The Phoenix Gold ZX18PBS is a slim, sealed 8-inch subwoofer enclosure from the ZX Series, rated at 200W RMS (400W max) and under 13cm deep including the grille.
Key specifications
- Subwoofer size: 8 inch (200mm)
- Power handling: 200W RMS / 400W max
- Impedance: 4 ohm
- Sensitivity: 88dB (1W/1m)
- Enclosure: sealed
- Depth: under 13cm including grille
- Dimensions (LxWxH): 489 x 306.6 x 124.8mm
- Mounting: brackets, screws and L & Z brackets, down-firing possible
ZX18PBS 400W Max Power 8″ Slim Subwoofer Box
The ZX18PBS is less than 13cm deep including the grille, making it a practical choice for adding bass without eating into boot space. The 8-inch subwoofer handles up to 400W max power.
The enclosure ships with brackets, screws, and L & Z brackets, covering a range of mounting options including down-firing. It integrates cleanly into 2 or 3-way audio systems. If you need more cone area, Phoenix Gold also offers the ZXT10D4 ZX Series 10-inch slimline subwoofer from the same range.
Phoenix Gold is built around performance, innovation, quality, and excellence — designed to bring a realistic, high-fidelity listening experience to your vehicle.
Explore the full range in Phoenix Gold Subwoofers.
Specification
| Power Handling | (MAX) 400W |
|---|---|
| Power Handling | (RMS) 200W |
| Subwoofer size | 8″ (200mm) |
| Sensitivity | 88dB (1W/1m) |
| Impedance | 4Ω |
| Dimensions | (LxWxH) 489 x 306.6 x 124.8mm |
More specs
| |
What's Included
- ZX18PBS 400W Max Power 8″ Slim Subwoofer Box
Phoenix Gold
About the Phoenix Gold ZX18PBS
From our tech experts at CEN
The Phoenix Gold ZX18PBS is an 8 inch slim sealed subwoofer enclosure from the ZX Series, rated at 200W RMS and 400W max with a 4 ohm impedance. Under 13cm deep including the grille, it measures 489 x 306.6 x 124.8mm, designed to add bass without significantly reducing boot space. Brackets, screws, and L Z brackets are supplied, with down-firing installation also possible.
Who it suits
This suits drivers who want a solid bass upgrade in a slim, space-efficient package. It works well within 2 or 3-way car audio systems. Drivers after a self-contained solution may prefer an active enclosure from the Phoenix Gold range instead.
Our tech experts advise
The ZX18PBS is a passive unit and needs a separate amplifier — the Phoenix Gold ZXM500.1 is a well-matched mono option. A suitable power wiring kit is also required to complete the install. Fitting is priced per vehicle; visit our car audio installation page for a quote.
Explore the full Phoenix Gold range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Phoenix Gold
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
More from Phoenix Gold Subwoofers
More options from the same range, in stock and ready to go
Phoenix Gold ZXT8D2 ZX Series 8 Inch Sub Slimline Subwoofer 150w RMS
£129.99
View product
Phoenix Gold ZP12D2 ZP Series 12 Inch Sub Streetbass Subwoofer 1500 RMS
£249.99
Phoenix Gold ZP12D4 ZP Series 12 Inch Sub Streetbass Subwoofer 1500 RMS
£249.99
Phoenix Gold ZX18PDF 8 Inch Sub Enclosure Slim Passive Subwoofer Box 250w RMS
£159.99
Phoenix Gold ZXT12D2 ZX Series Sub 12 Inch Slimline Subwoofer
£169.99
Frequently Asked Questions
Q: Do I need an amplifier for this subwoofer?
A: Yes, unless it is an active (powered) subwoofer with a built-in amplifier. Passive subwoofers need an external amplifier matched to the RMS power and impedance shown in the Specification tab.
Q: What does RMS power mean?
A: RMS is the continuous power a subwoofer can handle, and it is the number that matters when matching an amplifier. Peak or max figures describe short bursts only. Match your amplifier output to the RMS rating in the Specification tab.
Q: How deep is the Phoenix Gold ZX18PBS?
A: The ZX18PBS is less than 13cm deep including the grille. Overall dimensions are 489 x 306.6 x 124.8mm (LxWxH).
Q: What impedance and power rating does the ZX18PBS have?
A: It is a 4 ohm sealed subwoofer box rated at 200W RMS and 400W maximum, with 88dB (1W/1m) sensitivity.
Q: Can the ZX18PBS be mounted down-firing?
A: Yes. It comes with brackets, screws and L and Z brackets, allowing versatile mounting options including down-firing.
Q: Can CEN fit this subwoofer box for me?
A: Yes. CEN offers professional installation from our Nottingham premises, including amplifier wiring. Contact us to book an installation slot or ask for a fitting quote.
Not Sure Where to Start?
Straightforward advice and the latest news from our Nottingham team.
All Guides and News →
Car Audio
Pioneer Perfect Fit 9-Inch Stereos: Fitting Kits and Every Car They Fit (2026)
Read the guide →
Car Audio
BMW Speaker Upgrades Explained: Where to Start and What Fits
Read the guide →
Car Audio
Christmas Gift Guide 2026: Car Audio, Dash Cams and Outdoor Tech
Read the guide →
Car Audio
Upgrading Car Audio Without Replacing the Factory Stereo
Read the guide →
Car Audio
Amplifier Wiring Kits Explained: Gauge, Fuses and Earths
Read the guide →
Car Audio
New at CEN: Option Audio Drive-10Flat — Golf Mk8 Bass, Zero Boot Space Lost
Read more →