


Couldn't Load Pickup availability
The Zapco REF 150.6 is a 6-channel Class AB car amplifier from the Zapco Reference Series, rated at 6 x 150W RMS at 4 ohms, 6 x 220W RMS at 2 ohms, or bridged to 3 x 450W RMS.
Key specifications
- Model: REF 150.6
- Channels: 6, Class AB
- Power @ 4 ohms: 6 x 150W RMS
- Power @ 2 ohms: 6 x 220W RMS
- Bridged @ 4 ohms: 3 x 450W RMS
- Signal to noise ratio: >102dB
- Frequency response: 10Hz – 40kHz ±1dB
- Fuse rating: 3 x 40A
- Dimensions: 210 x 62 x 480 mm (W x H x L)
REF 150.6 — 6-Channel Class AB High-End Amplifier
The Reference Series was originally developed to replace the Studio Series, with the first models completed in 2001. Initially known as the AG range, it was Zapco's first effort to bring the qualities behind the Zapco name to a more accessible amplifier line. The new Reference Series continues that goal, targeting high audio performance at its price point, with four models spanning 1, 2, 4 and 6 channels alongside a revised design and carefully selected internal components.
Features
- 6-channel Class AB high-end amplifier
- Signal to noise ratio >102dB
- High-quality bipolar-input dual op-amp
- High-quality, high-transition-frequency transistors
- High-precision 0.1% output resistors
- High-density, low-loss-factor input capacitors
- Low internal resistance power capacitors
- Ultra-low on-resistance, fast-switching MOSFETs
- High-power pure copper transformers
- Low-resistance fuses
Explore the full range in Zapco Amplifiers.
Specification
| Type | 6-Ch Class-AB |
|---|---|
| S/N Ratio (A-Weig. @ Full Power) | > 102dB |
| Channel Separation | 64dB |
| Frequency Response | (± 3 dB) 10Hz ~ 40KHz |
| RMS Power (@ 14.4V, THD 1%) | 6 x 150W (4Ω), 6 x 220W (2Ω), 3 x 450 (4Ω/Bridged) |
| Low-Level Input Channels | 6 |
| Input Sensitivity | 0.5V ~ 8V |
| Input Impedance | > 20KΩ |
| Working Voltage | 9 ~ 16V |
| Fuse Rating | 2 x 40A |
| Dimensions | (mm) 480(L) x 210(W) x 62(H) |
More specs
| |
What's Included
- Zapco REF 150.6
Zapco
About the Zapco REF 150.6
From our tech experts at CEN
A 6-channel amplifier from Zapco, Class AB, rated at 150w RMS.
Who it suits
Drivers building a front stage that needs each channel doing a defined job. Zapco amplifiers are bought by people who care what the power figure actually means rather than what it says on the box.
Our tech experts advise
Matching the amplifier to the speakers matters more than headline watts, and gains want setting with a meter. It needs a fused feed from the battery on the correct cable gauge. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.
Explore the full Zapco range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Zapco
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
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: How much power does the Zapco REF 150.6 produce?
A: It is rated at 6 x 150 watts RMS at 4 ohms, 6 x 220 watts RMS at 2 ohms, or 3 x 450 watts RMS bridged at 4 ohms.
Q: Can the REF 150.6 be bridged?
A: Yes. Bridged at 4 ohms it delivers 3 x 450 watts RMS.
Q: How big is the REF 150.6?
A: Its overall dimensions are 210mm wide, 62mm high and 480mm long, and it uses 3 x 40A fuses.
Not Sure Where to Start?
Straightforward advice and the latest news from our Nottingham team.
All Guides and News →
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 →
Car Audio
Car Speaker Sizes Explained: What Fits Your Car
Read the guide →
Car Audio
Alpine iLX-F905D Halo9 Review: The Big-Screen Upgrade for Almost Any Car
Read more →



































