1. Introduction
The PreSonus Quantum ES 4 is a high-performance 4x4, 24-bit/192 kHz USB-C audio interface designed for musicians and audio creators. It combines advanced technology with user-friendly features to streamline your recording workflow. This manual provides essential information for setting up, operating, and maintaining your Quantum ES 4.
Image 1.1: The PreSonus Quantum ES 4 audio interface shown with the included Studio One Pro software box.
2. What's in the Box
Your PreSonus Quantum ES 4 package should contain the following items:
- PreSonus Quantum ES 4 Audio Interface
- USB-C to USB-C Cable
- USB-C to USB-A Cable
- Quick Start Guide with Serial Number
- Rubber Feet (for desktop use)
- Studio One Pro Software License (digital download upon registration)
Image 2.1: The Quantum ES 4 audio interface packaged with its accompanying Studio One Pro software.
Image 2.2: The Quantum ES 4 interface shown with the included USB-C cable for computer connection.
3. Setup
3.1 Connecting to Your Computer
- Connect the Quantum ES 4 to your computer using the provided USB-C to USB-C or USB-C to USB-A cable. The device is bus-powered, meaning it draws power directly from your computer via the USB connection.
- For older computer models, an optional Aux Power Port is available if additional power is required.
- Ensure your computer meets the minimum system requirements for the Quantum ES 4 (Windows or macOS).
3.2 Connecting Instruments and Microphones
The Quantum ES 4 features versatile input options:
- MAX-HD Mic Preamps: Four newly designed mic preamps with +75 dB of gain, suitable for today’s most popular microphones. These are transparent, low-noise, and digitally-controlled analog preamps.
- Fender Co-developed Instrument Inputs: Front-facing instrument inputs engineered for guitarists and bassists.
- MIDI Connectivity: MIDI In/Out ports are available for connecting MIDI devices such as keyboards or controllers.
Image 3.1: Front panel of the Quantum ES 4, highlighting inputs for microphones and instruments, along with controls.
Image 3.2: Back panel of the Quantum ES 4, showing MIDI, Main Outs, and USB-C connections.
3.3 Software Installation and Registration
- Go to my.presonus.com and register your Quantum ES 4 using the serial number found in your Quick Start Guide.
- Once registered, you will be able to download your complimentary copy of Studio One Pro, along with additional plugins, content, and more.
- Review the Studio-series User Manual available at www.presonus.com for more information on proper operation and installation.
Video 3.1: This video provides a detailed guide on how to set up and use the Quantum ES 4 audio interface, including software configuration.
4. Operating Instructions
4.1 Front Panel Controls
- Input Gain Knobs: Adjust the input level for each microphone/instrument channel.
- 48V Phantom Power: Activates +48V phantom power for condenser microphones.
- Auto Gain Button: Automatically sets the optimal gain level for your microphones and instruments, ensuring recording-ready levels.
- Illuminated Push Encoder: Provides flexible control over gain levels and output volume.
- LED Metering: Bright and responsive LED meters provide visual feedback for input and output levels.
- Main Output Knob: Controls the overall volume of the main outputs.
- Headphone Output Knob: Adjusts the volume for the headphone outputs.
Image 4.1: A hand interacting with the controls of the Quantum ES 4, demonstrating its ergonomic design for home studios.
4.2 Universal Control App
The Quantum ES 4 can be controlled from your mobile device, desktop, or tablet using the Universal Control App. This allows you to manage critical preamp functions like gain and phantom power without interrupting your recording session.
Image 4.2: The Universal Control App interface, showing remote control capabilities for the Quantum ES 4.
5. Software Integration (Studio One Pro)
The Quantum ES 4 includes a perpetual license for Studio One Pro, a professional recording software. It is also compatible with other popular DAWs like Ableton Live, FL Studio, Cubase, Pro Tools, Logic Pro, and Reaper.
5.1 Getting Started with Studio One Pro
- After installing and registering Studio One Pro, launch the software.
- Configure your audio device settings within Studio One to recognize the Quantum ES 4 as your input and output device.
- Create new tracks and assign the appropriate inputs from your Quantum ES 4 for recording.
Image 5.1: Studio One Pro software displayed on a laptop, connected to the Quantum ES 4 audio interface.
Video 5.1: This video provides an overview of the PreSonus Quantum ES series, highlighting its features and integration with Studio One Pro.
6. Maintenance
To ensure the longevity and optimal performance of your Quantum ES 4:
- Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to extreme temperatures or humidity.
- Do not attempt to open the casing or modify the internal components. This will void your warranty.
7. Troubleshooting
If you encounter issues with your Quantum ES 4, consider the following:
- No Power: Ensure the USB-C cable is securely connected to both the interface and your computer. If using the Aux Power Port, verify the power adapter is correctly plugged in.
- No Sound: Check all cable connections (inputs, outputs, headphones). Verify gain levels on the interface and within your DAW. Ensure the correct audio device is selected in your computer's sound settings and your DAW.
- Distortion/Clipping: Reduce input gain levels on the interface until the LED meters no longer show clipping.
- Software Not Recognizing Device: Reinstall the latest drivers from the PreSonus website. Ensure the device is properly registered.
8. Specifications
- Model: Quantum ES4
- Item Weight: 1.8 pounds
- Product Dimensions: 6.2 x 8.4 x 1.9 inches
- Number of Channels: 4
- Connectivity Technology: USB-C
- Sample Rate/Bit Depth: Up to 24-bit / 192 kHz
- Mic Preamps: MAX-HD with +75 dB gain
- Compatible Devices: Personal Computer, Laptop, Tablet
- Operating System: Windows, macOS
- Supported Software: Studio One Pro, Ableton Live, FL Studio, Cubase, Pro Tools, Logic Pro, Reaper, and more.
9. Warranty and Support
For warranty information, technical support, and additional resources, please visit the official PreSonus website:
