A modern alternative to the Lintronic TT455-RT-238

For two decades, the Lintronic TT455-RT-238 has been the box integrators reach for when a Bang & Olufsen remote needs to control something B&O never made. But the world it translates into has changed. The TT455 turns one infrared protocol into another; what most homes need today is a path from a B&O remote to anything: Sonos, a Samsung TV, Home Assistant, an entire smart home. This guide walks through the modern options, whether you want to keep your existing B&O infrared remotes or step up to the Beoremote One.

Why Bang & Olufsen infrared is different

Most remotes transmit on a 38 kHz infrared carrier. Bang & Olufsen has used 455 kHz since the Beolink 1000, which is part of why B&O remotes reach further and are more forgiving to aim, but also why standard IR receivers, learning remotes, and hubs like Broadlink simply cannot see them. To capture a Beo4 or any other B&O remote, you need hardware built for 455 kHz.

What the TT455-RT-238 does

The TT455 is a universal signal converter: it receives commands from a B&O remote and turns them into outgoing actions — standard 38 kHz infrared, RS232, or relay contacts. A single press on a Beo4 could start a projector, dim the lights, and lower a screen. It solved the 455 kHz problem, became a staple of professional Crestron and Control4 installations, and for years it was effectively the only product in its category.

It is also a product of its era. Configuration happens through a legacy Windows application installed on a PC, the outputs are IR, RS232, and relays aimed at equipment racks, and there is no native connection to the systems homes actually run today: Sonos, streaming players, smart TVs, Home Assistant. It is also increasingly hard to source. Replacing it one-to-one means buying another IR-to-IR translator. The more interesting question is whether you should replace the category instead.

Option 1: Keep your B&O IR remotes, bridge them to everything (Lydbro Two)

Lydbro Two starts where the TT455 starts, at a standard B&O IR eye, but ends somewhere very different. It captures commands from any Bang & Olufsen infrared remote and translates them into actions on the systems you actually use:

• Direct control of Sonos, BluOS (Bluesound, NAD, DALI), and Samsung TV over the local network
• Native Home Assistant integration (local push, installable via HACS), which puts your entire smart home behind those buttons
• MQTT for Control4, Crestron, and other professional systems, plus webhooks for everything else
• Configuration lives on the device itself, in a built-in web UI: nothing to install on a PC, no cloud account, no internet required
• Wired Ethernet, powered over PoE or USB, with firmware updates over the air

Option 2: Step up to the Beoremote One (Lydbro One)

If you are replacing the bridge anyway, it is worth asking whether the infrared remote should stay. Lydbro One takes the IR eye out of the equation entirely: it pairs directly with the Beoremote One over Bluetooth, no eye, no line of sight, no B&O speaker required, and connects it to the same targets: Sonos, BluOS, Samsung TV, Home Assistant, MQTT, and webhooks. You keep the B&O feel in your hand, current hardware you can still buy today, and you drop the last piece of infrared infrastructure. Lydbro One is available now for € 195.

Option 3: Build your own bridge

Because the real barrier is the 455 kHz carrier, a determined tinkerer can build a receiver around a 455 kHz IR sensor such as the TSOP7000, wire it to a Raspberry Pi or ESP32, decode the Beo4 protocol (open-source decoders like the ESP32 Beo4 library exist), and publish the presses to Home Assistant over MQTT. It works and is very flexible. The trade-offs: the TSOP7000 is discontinued and hard to find, and you build and maintain the whole thing yourself.

TT455-RT-238 vs Lydbro Two vs Lydbro One

One honest note

Lydbro Two and Lydbro One have no IR, RS232, or relay outputs of their own. That does not put legacy gear out of reach: through Home Assistant, a Lydbro can drive IR blasters, RS232 bridges, and practically anything else. But if all you want is a direct translation from B&O infrared to another brand's infrared, with no smart home in between, the TT455 still does that one job well.

Which option is right for you?

• You love your Beo4 or other B&O IR remotes and want them controlling Sonos, your TV, or your whole smart home: Lydbro Two.
• You want the same reach with current, in-production hardware and no infrared at all: Beoremote One + Lydbro One, available today.
• You enjoy microcontrollers and protocol decoding: build your own eye-to-MQTT bridge.
• You just need B&O IR translated to another brand's IR, one protocol to another and nothing more: keep the TT455.

References & further reading

• LinTronic product page
• Lintronic TT455-RT-238 hardware manual
• FlatpanelsHD review of the Lintronic IR converter
• aanban/esp32_beo4 (open-source Beo4 IR decoder for the TSOP7000)

Related guides

Beoremote One + Home Assistant
Beoremote One + Sonos
Beoremote One + Samsung TV

Frequently asked questions
About Lydbro

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