Vibe Powerbox 135.4-V5 Amp Compact Micro Class D 4 Channel Car Stereo Amplifier
Couldn't Load Pickup availability
The Vibe Powerbox 135.4-V5 is a compact micro Class D 4-channel car amplifier from Vibe's Powerbox range, delivering 4 x 135W RMS at 4 ohms and 4 x 210W RMS at 2 ohms. High-level inputs and Autosense turn-on make it straightforward to integrate with factory head units, and a bass remote is included.
This listing is the Powerbox 135.4-V5. The Powerbox 4-channel range is also available as the Vibe Powerbox 65.4M.
Key specifications
- Channels: 4
- RMS power at 4 ohm: 4 x 135W
- RMS power at 2 ohm: 4 x 210W
- Maximum power: 1,680W
- Dimensions: 47 x 198 x 121mm
- Frequency response: 20Hz–20kHz
- Crossover: LP/HP, 30Hz–5kHz
- Signal-to-noise ratio: 90dB
- Operating voltage: 9V–16V
Powerbox 135.4-V5 4-channel stereo amplifier
The Powerbox 4-channel amplifiers are an entry-level series designed with a compact footprint and features that aid integration with OEM head units. All three Powerbox 4-channel amps suit smaller installs where space-saving and efficiency matter.
Compact footprint: Micro Class D technology keeps the internals small while delivering strong output for the size.
OEM integration: High-level inputs allow the amp to work directly with factory head units — no aftermarket head unit required. The Vibe Powerbox 400.1M mono amp is available if you need a dedicated subwoofer channel alongside.
Optimised functions: A bass remote is included, allowing continuous adjustment of amp levels without accessing the unit directly.
Versatile installation: The compact dimensions make it easy to conceal, and Autosense turn-on removes the need for a remote wire, simplifying integration with OEM systems.
Explore the full range in Vibe Powerbox Amplifiers.
Specification
| Maximum Power | 1680 Watts |
|---|---|
| Dimensions | 47 x 198 x 121mm |
| RMS @ 4 Ohms Stereo | 4 x 135 Watts |
| RMS 2 Ohms Stereo | 4 x 210 Watts |
| RMS @ 4 Ohms Bridged | 4 x 135 + 1 x 420 Watts |
| Frequency Response | 20Hz – 20kHz |
| S/NR | 90dB |
| Damping Factor | Under 100 |
| Crossover Type | LP/HP |
| Crossover Range | 30Hz – 5kHz |
| Operating Voltage | 9v – 16v |
What's Included
- Vibe POWERBOX135.4-V5 POWERBOX 4 Channel Stereo Amplifier
Vibe
About the Vibe POWERBOX135.4-V5
From our tech experts at CEN
The Vibe Powerbox 135.4-V5 is a compact micro Class D 4-channel car amplifier, delivering 4 × 135W RMS at 4 ohms or 4 × 210W RMS at 2 ohms. It measures 47 × 198 × 121mm and includes a bass remote. High-level inputs and Autosense turn-on let it connect directly to a factory head unit without additional adaptors.
Who it suits
This amp suits drivers who want to upgrade factory audio without replacing the head unit. The compact footprint makes it practical where boot or under-seat space is limited. For a dedicated subwoofer channel alongside, consider the Vibe Powerbox 400.1M.
Our tech experts advise
At 47 × 198 × 121mm, it tucks under a seat or into a small boot corner with ease. Autosense turn-on removes the need for a remote wire from the head unit, keeping the install tidy. Pair it with an 8 AWG wiring kit for clean power delivery — the Vibe 8 AWG kit is a compatible option. Installation is priced per vehicle; visit our car audio installation page for details.
Explore the full Vibe range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Vibe
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 Vibe Powerbox Amplifiers
More options from the same range, in stock and ready to go
PopularVibe Powerbox 400.1M Amp Compact Micro Class D Mono Sub Subwoofer Amplifier
RRP £99.00Save 10%£89.00
PopularVibe Powerbox 65.4M Amp Compact Micro Class D 4 Channel Car Stereo Amplifier
RRP £125.00Save 4%£119.00
Vibe Powerbox 3000.1D-V6 Amp Class D Monoblock Subwoofer Amplifier 3000w RMS
£399.99
Vibe Powerbox 65.4-8 DSP-V3 Amp 4 Channel Car Stereo Amplifier with Built in DSP
£329.00
Vibe Powerbox 800.1D-V3 Amp Class D 1 Channel Mono Car Subwoofer Amplifier
£249.99
Frequently Asked Questions
Q: How do I choose the right amplifier for my speakers or subwoofer?
A: Match the amplifier's RMS output per channel to the RMS handling of your speakers or subwoofer at the same impedance. The Specification tab lists the power figures. If in doubt, contact CEN with your setup and we will recommend a match.
Q: What wiring do I need to install this amplifier?
A: You will need an amplifier wiring kit sized to the amplifier's power draw, typically including power and earth cable, a fuse, RCA leads and a remote wire. CEN stocks complete wiring kits, and the amplifier's fuse rating is the guide to the cable gauge required.
Q: What class of amplifier is this and does it matter?
A: Class D amplifiers are compact and efficient, ideal for subwoofers and modern installs. Class AB designs are traditionally favoured for outright sound quality on mid and high frequencies. The class is listed in the Specification tab where provided.
Q: Will an amplifier work with my factory head unit?
A: Yes, in most cases. If your head unit has no RCA outputs you will need a line output converter to feed the amplifier a clean signal. CEN stocks line output converters and can advise the right one for your vehicle.
Q: Can CEN install this amplifier?
A: Yes. CEN offers professional amplifier installation from our Nottingham premises, including secure mounting, wiring and setup. Contact us to book.
Q: Does the Powerbox 135.4-V5 need a remote turn-on wire?
A: Not when using the high level inputs. Its auto sense feature turns the amplifier on and off with the factory head unit, so no remote wire is needed.
Q: How much power does the Vibe Powerbox 135.4-V5 deliver?
A: 4 x 135W RMS at 4 ohms or 4 x 210W RMS at 2 ohms, with a maximum power of 1680W.
Not Sure Where to Start?
Straightforward advice and the latest news from our Nottingham team.
All Guides and News →
Amplifiers
What Is a DSP? In-Car Sound Processing Explained
Read the guide →
Amplifiers
New at CEN: Helix Next DSP Ultra XT — The New Flagship of In-Car Processing
Read more →
Amplifiers
Car Amplifier Buying Guide: Channels, Power and Matching Explained
Read the guide →
Amplifiers
The FiiO K15 DAC and Headphone Amplifier
Read more →
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 →