EPOS GSX 300 External Computer Sound Card User Manual

Introduction

The EPOS GSX 300 is an external USB sound card designed to enhance your audio experience on PC. It provides high-resolution stereo audio and customizable 7.1 surround sound, offering improved acoustic clarity and positional accuracy. This manual provides instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance of your device.

What's in the Box

Verify that all items are present in the packaging:

EPOS GSX 300 External Sound Card
USB Cable (Micro-USB to USB-A)
Quick Start Guide
Safety Guide

Contents of the EPOS GSX 300 box including the sound card, USB cable, Quick Start Guide, and Safety Guide. — Figure 1: Package Contents. This image displays the EPOS GSX 300 sound card, a Micro-USB to USB-A cable, a Quick Start Guide, and a Safety Guide, illustrating all items included in the product box.

Setup

1. Connecting the GSX 300

Connect the Micro-USB end of the provided USB cable to the Micro-USB port on the back of the GSX 300.
Connect the USB-A end of the cable to an available USB port on your PC.
Connect your gaming headset's 3.5 mm audio jack to the headset port (marked with a headphone icon) on the back of the GSX 300.
Connect your microphone's 3.5 mm jack to the microphone port (marked with a microphone icon) on the back of the GSX 300.

Rear view of the EPOS GSX 300 showing the Micro-USB port, 3.5mm headset jack, and 3.5mm microphone jack. — Figure 2: Rear Connectivity. This image shows the rear panel of the GSX 300, highlighting the Micro-USB input, the 3.5mm output for headphones, and the 3.5mm input for a microphone, indicating where to connect your devices.

2. Software Installation (EPOS Gaming Suite)

For full functionality, including 7.1 surround sound and customizable sound profiles, install the EPOS Gaming Suite software. This software is compatible with Windows 10 and 11.

Visit the official EPOS website to download the latest version of the EPOS Gaming Suite.
Follow the on-screen instructions to complete the installation.
Restart your computer if prompted.

Screenshot of the EPOS Gaming Suite interface with the GSX 300 and its features highlighted. — Figure 3: EPOS Gaming Suite Interface. This image displays the EPOS Gaming Suite software, showing options for customizing in-game audio, upgrading to 7.1 surround sound, and the function of the smart button for quick mode switching. The hardware volume control is also indicated.

Operating the GSX 300

Volume Control

The large dial on the front of the GSX 300 controls the audio output volume. Rotate the dial clockwise to increase volume and counter-clockwise to decrease volume. The LED ring around the dial indicates the current volume level and mode.

Front view of the EPOS GSX 300 with a blue LED ring around the volume dial. — Figure 4: Front Panel Controls. This image shows the front of the GSX 300, featuring the large volume dial with an illuminated blue LED ring and a customizable smart button below it.

Customizable Smart Button

The small button located below the volume dial is a customizable smart button. By default, it allows you to switch between stereo and 7.1 surround sound modes. Within the EPOS Gaming Suite, you can configure this button to switch between different sound profiles or other functions.

EPOS Gaming Suite Features

The EPOS Gaming Suite provides advanced control over your audio experience:

7.1 Surround Sound: Activate and customize the EPOS-engineered 7.1 surround sound for enhanced positional audio.
Sound Profiles: Create and save custom sound profiles optimized for different games or media types.
Equalizer: Adjust audio frequencies to fine-tune your sound.
Microphone Settings: Configure microphone gain, noise cancellation, and noise gate settings.
Windows 10 Synchronization: The device automatically synchronizes with Windows 10 sound settings, allowing you to monitor sound levels directly from your operating system.

Maintenance

To ensure the longevity and optimal performance of your EPOS GSX 300, follow these maintenance guidelines:

Cleaning: Use a soft, dry cloth to clean the exterior of the device. Avoid using harsh chemicals, solvents, or abrasive materials.
Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
Handling: Handle the device with care. Avoid dropping it or subjecting it to strong impacts.
Connectivity: Ensure all cables are securely connected but avoid excessive force when plugging or unplugging.

Troubleshooting

If you encounter issues with your GSX 300, refer to the following common solutions:

Problem	Possible Cause	Solution
No audio output	Incorrect cable connection Incorrect audio output device selected in PC settings EPOS Gaming Suite not installed or running	Ensure USB, headset, and microphone cables are securely connected. In Windows Sound Settings, set "EPOS GSX 300" as the default playback device. Install or restart the EPOS Gaming Suite.
Microphone not working	Incorrect microphone connection Incorrect audio input device selected in PC settings Microphone muted in software or physically	Ensure microphone cable is securely connected to the microphone port. In Windows Sound Settings, set "EPOS GSX 300" as the default recording device. Check microphone settings in EPOS Gaming Suite and any communication software (e.g., Discord, Teamspeak).
7.1 Surround Sound not active	EPOS Gaming Suite not installed 7.1 mode not selected	Install the EPOS Gaming Suite. Use the smart button or the Gaming Suite to switch to 7.1 surround sound mode.
Software crashes or freezes	Outdated software version Conflicting software	Ensure EPOS Gaming Suite is updated to the latest version. Try temporarily disabling other audio enhancement software. Reinstall the EPOS Gaming Suite if issues persist.

Specifications

Feature	Detail
Model Number	1000201
Connectivity	Micro-USB (input), 3.5 mm Headset Jack (output), 3.5 mm Microphone Jack (input)
Audio Output Mode	Stereo, 7.1 Surround Sound (via EPOS Gaming Suite)
Hardware Platform	PC
Operating System Compatibility	Windows 10, Windows 11
Item Weight	5.6 ounces (approx. 159 grams)
Product Dimensions (LxWxH)	2.24 x 6.65 x 5.59 inches (approx. 5.69 x 16.9 x 14.2 cm)
Manufacturer	EPOS \| Sennheiser

Warranty Information

The EPOS GSX 300 typically comes with a manufacturer's warranty. Please refer to the Safety Guide included in your product packaging or visit the official EPOS website for detailed warranty terms and conditions specific to your region. Keep your proof of purchase for warranty claims.

Support

For further assistance, technical support, or to download the latest software and drivers, please visit the official EPOS support website:

www.eposaudio.com/gaming/support

You may also find helpful FAQs and community forums on their website.

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EPOS GSX 300