--- title: Hub DSP Receiver description: The Hub DSP receiver is the central component of the Catchbox Plus wireless microphone system, designed for seamless connectivity and control of up to four wireless microphone channels. It's a versatile solution suitable for various settings from corporate boardrooms to large-scale events.  --- [Skip to content](https://help.catchbox.com/knowledge/hub-dsp-receiver#main-content) - [Catchbox Plus](https://catchbox.com/plus-system) - [Case studies](https://catchbox.com/case-study/) - [Book a demo](https://explore.catchbox.com/book-demo?hsCtaTracking=26c83435-1828-4cad-b17a-14b537503736%7C17332728-d507-4382-827d-62d2279a4c0e) Open main navigation Close main navigation - [Catchbox Plus](https://catchbox.com/plus-system) - [Case studies](https://catchbox.com/case-study/) - [Book a demo](https://explore.catchbox.com/book-demo?hsCtaTracking=26c83435-1828-4cad-b17a-14b537503736%7C17332728-d507-4382-827d-62d2279a4c0e) - [Leave a Review](https://share.hsforms.com/2asY8tj1LSo2Wb24hR2X_GA292ev) [Leave a Review](https://share.hsforms.com/2asY8tj1LSo2Wb24hR2X_GA292ev) How can we help? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://help.catchbox.com/knowledge?hsLang=en) 2. [Catchbox Plus System](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en) 3. [Hub DSP receiver](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#hub-dsp-receiver) # Hub DSP Receiver Hub DSP receiver is the central component of the Catchbox Plus system. It acts as a wireless receiver, a digital signal processor (DSP), and a mixer.  **Hub Interface Guide** is a visual map of every menu, setting, and audio path available in the Hub receiver. **[Click here to open Hub Interface Guide](https://hub-interface-guide.my.canva.site/)** **[⬇️ Download PDF Version](https://help.catchbox.com/hubfs/%23Hub%20Interface%20Guide.pdf?hsLang=en)** [Universal Connectivity](https://help.catchbox.com/knowledge/hub-dsp-receiver#connectivity) [FLEX Ports](https://help.catchbox.com/knowledge/hub-dsp-receiver#flex) [Built-in DSP and Path Optimization](https://help.catchbox.com/knowledge/hub-dsp-receiver#dsp) [Scalability](https://help.catchbox.com/knowledge/hub-dsp-receiver#scalability) [Hub Receiver Scheme](https://help.catchbox.com/knowledge/hub-dsp-receiver#scheme) ### **Universal Connectivity** Hub features a versatile range of ports designed for various professional AV setups: - **USB-C:** Provides power and serves as a two-way digital audio interface for your computer. - **3-pin balanced MIXOUT (L & R):** Primary outputs for room speakers. - **MIXOUT RCA:** An unbalanced output for recording or assistive listening. - **AUX IN (3.5mm):** An analog input for laptops or media players. - **Dante® (Optional):** A network interface for 2x2 or 4x4 digital audio routing. ### **FLEX ports** Hub features [**FLEX ports**](https://help.catchbox.com/knowledge/flex-ports-and-channel-cloning-explained?hsLang=en) (2 or 4 depending on your model). These can be configured in two ways: - **FLEX as INPUTS (Bringing Sound In):** Use this to add 3rd party microphones or external media players to your Catchbox mix. - **Mic Mode:** Passes through the Automixer (ideal for 3rd party mics). - **Media Mode:** Bypasses the Automixer (ideal for music/video) to ensure your audio isn't accidentally quieted. - **FLEX as OUTPUTS (Routing Sound Out):** By default, FLEX ports are outputs. They offer two ways to send audio: - **Direct Mode (Default):** Each port outputs a raw unmixed signal from a specific Catchbox mic (e.g., FLEX 1 = Mic 1). - **Channel Cloning:** You can clone an existing mix (like your USB or RCA mix) and send it out through a FLEX port to a secondary recorder. > **⚠️ Important:** FLEX ports operate on a global *Master Switch.* You cannot have one port as an input and another as an output at the same time. ### **Built-in DSP & Path Optimization** Hub automatically optimizes audio for different destinations: - **In-room Path (3-PIN/RCA):** Features **Feedback Suppression** to prevent screeching in local speakers. - **Video Call Path (USB):** Hub manages two way audio to ensure clear, echo free communication on video calls. - **Global Automixer:** Manages up to 12 channels (including Catchbox mics, FLEX inputs, and Dante inputs) to prioritize the active speaker and eliminate background hiss. ### **Scalability** **Wireless Range:** Up to 100m / 330ft. **Capacity:** Supports up to 10 Catchbox mics (EU) or 6 mics (US). With **Radio Sync**, this expands to **15 mics (EU) / 9 mics (US)** in a single environment. **Remote Management:** Fully compatible with the **Catchbox Remote Control** app and **Q-SYS** plugins for campus-wide monitoring. ### **Hub Receiver Scheme** ![Hub CBPLRX004 Inputs&Outputs ](https://help.catchbox.com/hs-fs/hubfs/Hub%20CBPLRX004%20Inputs%26Outputs%20.png?width=670&height=643&name=Hub%20CBPLRX004%20Inputs%26Outputs%20.png)   - [Catchbox Plus System](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#main-content) - [Overview](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#overview) - [Hub DSP receiver](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#hub-dsp-receiver) - [Hub features](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#hub-features) - [Stick Mic](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#stick-mic) - [Clip Mic](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#clip-mic) - [Cube Mic](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#cube-mic) - [System Firmware](https://help.catchbox.com/knowledge/catchbox-plus-system?hsLang=en#system-firmware) - [Product Setup](https://help.catchbox.com/knowledge/product-setup?hsLang=en#main-content) - [Product Setup](https://help.catchbox.com/knowledge/product-setup?hsLang=en#product-setup) - [Product Setup for Integrations](https://help.catchbox.com/knowledge/product-setup?hsLang=en#product-setup-for-integrations) - [How-to's](https://help.catchbox.com/knowledge/product-setup?hsLang=en#how-tos) - [Product Features](https://help.catchbox.com/knowledge/product-setup?hsLang=en#product-features) - [DECT Radio Protocol](https://help.catchbox.com/knowledge/product-setup?hsLang=en#dect-radio-protocol) - [Ordering & Shipping](https://help.catchbox.com/knowledge/ordering-shipping?hsLang=en#main-content) - [How to Order Plus System](https://help.catchbox.com/knowledge/ordering-shipping?hsLang=en#how-to-order-plus-system) - [Shipping](https://help.catchbox.com/knowledge/ordering-shipping?hsLang=en#shipping) - [Billing](https://help.catchbox.com/knowledge/ordering-shipping?hsLang=en#billing) - [Warranty & Returns](https://help.catchbox.com/knowledge/ordering-shipping?hsLang=en#warranty-returns) - [Microphone Customization](https://help.catchbox.com/knowledge/microphone-customization?hsLang=en) - [Troubleshooting](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#main-content) - [Technical Troubleshooting](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#technical-troubleshooting) - [Audio Quality Issues](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#audio-quality-issues) - [Mic Troubleshooting](https://help.catchbox.com/knowledge/troubleshooting?hsLang=en#mic-troubleshooting) - [Materials](https://help.catchbox.com/knowledge/materials?hsLang=en) - [Remote Control & Monitoring](https://help.catchbox.com/knowledge/remote-control-monitoring?hsLang=en) - [Beltpack Module](https://help.catchbox.com/knowledge/beltpack-module?hsLang=en) - [Discontinued](https://help.catchbox.com/knowledge/discontinued?hsLang=en#main-content) - [Catchbox Legacy Plus](https://help.catchbox.com/knowledge/discontinued?hsLang=en#catchbox-legacy-plus) - [Catchbox Mod](https://help.catchbox.com/knowledge/discontinued?hsLang=en#catchbox-mod) Copyright © 2026, Catchbox SIA