Take Control of Your MIDI Rig With the Crumar ST4
Whether you’re running a multi-synth live performance or layering hardware instruments in the studio, clean MIDI routing is essential. The Crumar ST4 (4-Port Switchable MIDI Thru Box) delivers simple, reliable control over multiple MIDI devices – without complex menus, tangled setups, or signal headaches.
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Audio / MIDI Interfaces
What Is the Crumar ST4?
The ST4 is a compact MIDI thru box featuring 1 x MIDI input and 4 x independently switchable MIDI outputs, allowing you to route one MIDI source to up to four synths, drum machines, or modules at once. Think of it as your command hub for hardware-based music setups – all from one intuitive box.

Smooth Signal Flow, Zero MIDI Glitches
Unlike cheaper splitters or DIY solutions, the Crumar ST4 ensures precise MIDI communication with no hung notes, no jitter, and no incomplete messages. Each channel can be activated or muted instantly with a button press, making real-time routing changes effortless during live sets or studio sessions.

USB-MIDI Interface Included
Need to control hardware from your DAW? The ST4 isn’t just a thru box – it also functions as a USB-MIDI interface, making it easy to integrate hardware synths with Ableton Live, Logic Pro, Cubase, or any other DAW-based workflow.

Perfect for Live Performers & Synth Enthusiasts
From solo electronic artists and modular enthusiasts to keyboardists and producers building hybrid setups, the Crumar ST4 gives you the freedom to expand your sound without complexity. Power it via USB, plug in your MIDI gear, and you’re ready to go. No advanced setup required – just press a button and play.
Why We Love It
Musicians trust the ST4 because it’s simple, stable, and built for real-world performance. If you’re looking to unlock your hardware rig’s full potential, streamline your live setup, or avoid MIDI headaches forever, this little box might be your new best friend.
Level Up Your MIDI Workflow
👉 Explore the Crumar ST4 today and take complete control of your synth ecosystem! 👇
Audio / MIDI Interfaces



