Anthem MRX SLM 4K

Anthem MRX SLM 4K

The Anthem MRX SLM 4K is a five-channel slim-line A/V receiver built for installations where a traditional receiver simply will not fit. With its slim design, the MRX SLM can be tucked away behind a flat-panel television, inside a cabinet, or even in the wall — built to be heard, not seen. It carries Anthem's full room correction technology and a genuine 50 watts per channel, in a chassis that delivers exceptional audio quality in an ultra-compact form.

A Receiver Built to Be Hidden

The MRX SLM's slim profile allows it to be tucked behind a flat-panel television, installed inside a cabinet or wall cavity, or mounted on any surface using the included mounting bracket. An IR extender input — with an IR repeater included in the box — means the unit remains fully controllable even when completely out of sight. Control drivers are available for Control 4, Savant, URC, Elan, Crestron, and RTI, making it straightforward to integrate into any managed home environment.

Anthem Room Correction (ARC Genesis)

Using a precision microphone and advanced algorithms, it addresses room acoustic problems at source rather than masking them, optimising frequency response for the space the system is installed in. Four storable profiles give flexibility across different listening configurations without having to rerun the calibration process each time.

Wireless Streaming

The MRX SLM supports Apple AirPlay, Google Cast, Spotify Connect, and Bluetooth, allowing audio to be streamed from phones, tablets, and laptops without additional hardware. Wi-Fi and Ethernet connectivity are both supported.

Technical Specifications

Who Is It For?

The MRX SLM is the right choice for anyone building a home cinema or multi-room audio system where rack space or cabinet depth is limited — new builds, furniture installations, behind-screen setups, or any room where the equipment needs to be genuinely invisible. It is equally at home in a managed smart home installation, with full support for the major control platforms. If you need a traditional full-size receiver with a front panel and physical controls, this is not it — but if you need Anthem-quality sound in a hidden installation, there is very little else at this level.

Buying from Martins Hi-Fi

Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. You are welcome to visit our Norwich showroom to discuss the MRX SLM and how it might work within your specific installation. When you get in touch, you'll be speaking with Dave and Chris — experienced specialists who can advise on this product and your whole system. Contact us at info@martinshifi.co.uk, call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.