---
title: XLR Audio Card
description: "One of the most powerful features of **Constellation** is its modular design, allowing you to customize your system by swapping expansion cards. Currently the **Ground Central** unit comes equipped with the default **XLR** **Audio Card**, which includes an XLR /…"
url: "https://docs.mjpaudiodesigns.com/docs/audio-xlr-card/"
updated: "2025-12-09"
category: Expansion Cards
---

# XLR Audio Card

One of the most powerful features of **Constellation** is its modular design, allowing you to customize your system by swapping expansion cards. Currently the **Ground Central** unit comes equipped with the default **XLR** **Audio Card**, which includes an XLR / Jack combo input, a preamp, and two outputs (Left and Right).

![](https://docs.mjpaudiodesigns.com/wp-content/uploads/2025/05/Ground-Central-Synth-Card.479-1024x310.jpg)

However, if you’re looking for a different workflow or functionality, we’re developing a **wider range of expansion Cards** that can transform your unit into an entirely new type of audio processor. Stay tune for future expansion cards by following us on Discord or through our social media channels (see the [Contact section](https://docs.mjpaudiodesigns.com/docs/contact/)).

> The expansion cards are easily interchangeable and can be removed by loosening the four screws on the back of each card.