Blustream CMX42AB Contractor 4x2 HDMI Matrix
Our Contractor CMX42AB 4K HDMI Matrix offers unprecedented performance and value for the custom installation market.
The CMX42AB supports HDMI 2.0 and HDCP 2.2, allowing distribution of four HDMI sources to two displays. This enables all sources to be viewed as required within a matrix configuration.
The unit transmits all HDMI resolutions up to and including 4K 60Hz 4:4:4. The 4-Way matrix also includes audio breakout and EDID management.
Key Features
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Features 4 x HDMI inputs which can be independently routed to 2 x HDMI outputs
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Supports HDMI 2.0 18Gbps specification including HDR
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Supports up to 4K UHD 60Hz 4:4:4
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Supports all industry standard video resolutions including VGA-WUXGA and 480i-4K
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Supports all known digital HDMI audio formats including Dolby TrueHD, Atmos; DTS-HD Master Audio and DTS:X transmissions
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HDMI audio breakout to associated output analogue L/R audio and coaxial digital outputs concurrently
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Control via front panel, IR and RS-232
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IR routing
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Supplied with Blustream 5V IR receivers and emitters
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3rd Party drivers available for all major home control brands
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Advanced EDID management
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HDCP 2.2 compliant
Specifications
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Video Input Connectors: 4 x HDMI Type A, 19-pin, female, locking
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Video Output Connectors: 2 x HDMI Type A, 19-pin, female, locking
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Audio Output Connectors: 2 x RCA (S/PDIF), 2 x Analogue audio L/R (3.5mm stereo jack)
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RS-232 Serial Port: DB-9, female
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IR Input Ports: 3 x 3.5mm stereo jack
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IR Output Ports: 4 x 3.5mm mono jack
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Mounting Kit Included
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Unit Dimensions (W x D x H): 255mm x 104mm x 40mm (without feet or connections)
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Unit Dimensions (W x D x H): 255mm x 115mm x 47mm (with feet and connections)
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Shipping Weight: 1.6kg
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Operating Temperature: 32°F to 104°F (0°C to 40°C)
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Storage Temperature: -4°F to 140°F (-20°C to 60°C)
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Power Supply: 12V/2A DC
Box Contents
1 x CMX42AB Matrix
1 x 12V/2A DC Power Supply
1 x Remote Control
4 x IR Emitter
3 x IR Receiver
1 x Mounting Kit
1 x Quick Reference Guide
| Item | CMX42AB |
|---|---|
| More Info. | Blustream CMX42AB Contractor 4x2 HDMI 2.0 4K HDCP 2.2 Matrix with Audio Breakout, EDID Management and IR Routing |
Delivery Rates to mainland UK (excluding large and/or heavy items)
Delivery is to ground floor/kerbside only, if you have special delivery instructions you must contact us to ensure that we can have the best chance of success in delivering the item. We required items to be signed for.
Delivery dates are Monday to Friday unless otherwise specified
Delivery cut off is 3-4pm on most items - earlier time exceptions are large items, high value items, items requiring a pallet (i.e bulk orders) or items which direct ship from the manufacturer or supplier. If you order after cut-off then the order is processed the next day, that means if you ordered Tuesday at 8pm at night, the next day delivery option (if applicable) is Thursday as the order is processed on the Wednesday.
On a large number of items we offer a free delivery service.
Delivery Rates to Highlands, Islands, Northern Ireland & Remote Areas - (excluding screens and Touch Screens)
Non mainland and the Highlands and Islands - this includes anything that goes over water that does not have road access. These rates are determined by couriers based on postcode. If there are multiple items then we may need to quote you for delivery.
This should automatically calculate at the checkout when you enter your address, but sometimes needs to be calculated on a case-by-case basis, please contact us for a quote in this instance.
Screens & Digital Displays
These also have a standard rate ranging upwards from £15 + VAT depending on the size of the product and delivery location, for particularly large/heavy items this is quoted on a case-by-case basis please contact us for a price.
Delivery Rates to Republic of Ireland & rest of EU
We can still ship most items outside of the UK, however, this is quoted on a case-by-case basis so orders cannot be placed through the online checkout without a quoted delivery fee. We can also supply the goods with zero-rated VAT for exports outside the UK. Goods are supplied on DAP Incoterms for exports and we can also accomodate for you to use your own courier to collect the goods from us.
Returns
Faulty Items
Goods Reported Faulty Within 14 Days of Receipt.
If you have a faulty item and are reporting the fault within 14 days of receipt. When the goods are returned to us complete, we’ll issue a full refund to you via your original payment method. We will try and ensure that there is a fault, that often requires is running diagnostics or getting the manufacturer to speak to you directly to determine whether there is a genuine fault rather than just a set up error.
Goods Damaged in Transit
If your goods were damaged in transit it must be reported to us within 3 days. If goods are visibly damaged on receipt the delivery note must be marked accordingly. Once the damaged goods have been collected and received back into our warehouse, we’ll issue a refund via your original payment method. We will require pictures of the damage.
Consumers - If You Have Changed Your Mind – this is for personal use not business or organisations
If you are a private consumer and have changed your mind as long as the goods have not been in your possession for over 14 days, and the item can be sold again as new, then you are entitled to return the goods to us. If the item you are returning is a projector, the lamp hours used must not have exceeded 2 hours otherwise a re-stocking fee will be applied. The cost of returning items is the responsibility of the customer. As new means in original packaging with complete accessory packs and manuals. If any item is marked/damaged, including the packing, there may be a restocking fee. Please contact us directly before sending any goods back to obtain an RMA number without this there may be a delay in dealing with your return. If you purchased for a company, or an organisation you are not deemed a Consumer by law.
About Just Projectors
We’re here to help you choose the right projector or display - we've been doing it since 2001. Call us to talk through your requirements with our trained team. For higher-end models, we may be able to arrange a loan or demonstration.
We supply leading brands such as Epson, Sony, BenQ, ViewSonic, Panasonic and NEC. Because it’s easy to buy the wrong model, we offer real advice — not just an “add to cart” experience. We compare products side-by-side, offer a price promise, and only supply UK stock for stronger warranty support and genuine peace of mind. We avoid low-quality brands with unverified lumen and resolution claims.
We deliver across the UK and Ireland, with a 2–4 day service to Ireland.



