1. Introduktion
The PreSonus Quantum ES 2 is a high-performance 2x2 USB-C audio interface designed for musicians and audio creators. It features two MAX-HD mic preamps, instrument inputs co-developed with Fender, and comes with a perpetual license for Studio One Pro software. This manual provides essential information for setting up, operating, and maintaining your Quantum ES 2 interface.

Billede 1.1: The PreSonus Quantum ES 2 audio interface shown alongside its bundled Studio One Pro software box. This image illustrates the complete product package.
2. Opsætning
2.1 Udpakning og pakkeindhold
Before proceeding, ensure all components are present in the package:
- PreSonus Quantum ES 2 USB-C Audio Interface
- USB-C til USB-C kabel
- Power Supply (if not bus-powered, check specific model)
- Hurtig startvejledning
- Product Registration Card (for Studio One Pro license)
2.2 Hardwareforbindelser
Follow these steps to connect your Quantum ES 2:
- Tilslut til computer: Use the provided USB-C cable to connect the Quantum ES 2 to an available USB-C port on your computer. The device is bus-powered, but an optional Aux Power Port is available for older computer models that may require additional power.
- Tilslut mikrofoner/instrumenter:
- For microphones, use XLR cables to connect to the Mic/Line In combo jacks on the rear panel.
- For guitars or basses, use 1/4-inch TS cables to connect to the Guitar/Bass Inputs på frontpanelet.
- Tilslut skærme: Connect your studio monitors to the Main Outs (balanced 1/4-inch TRS) on the rear panel using appropriate cables.
- Tilslut hovedtelefoner: Plug your headphones into the Stereo Headphone Out på frontpanelet.

Billede 2.1: Frontpanel overview of the Quantum ES 2, highlighting 48V Phantom Power, Auto Gain, Multi-Function LED Encoder, Guitar/Bass Inputs, Responsive LED Metering, and Stereo Headphone Outs.

Billede 2.2: Bagpanel overview of the Quantum ES 2, showing MIDI Connectivity, All-New MAX-HD Mic Preamps, Optional Aux Power Port, Bus-Powered USB-C port, and Main Outs.
2.3 Softwareinstallation
To fully utilize your Quantum ES 2, you will need to install the necessary software:
- Registrer dit produkt: Visit the PreSonus website and register your Quantum ES 2 using the provided product key. This will grant you access to your Studio One Pro license and other software downloads.
- Install Universal Control: Download and install the latest version of PreSonus Universal Control for your operating system (Windows or macOS). This application provides full control and metering for your interface.
- Install Studio One Pro: Download and install Studio One Pro from your PreSonus account. Follow the on-screen instructions for activation.
- Driver installation: Universal Control will install the custom low-latency drivers required for optimal performance of your Quantum ES 2.
3. Betjeningsvejledning
3.1 Grundlæggende betjening
- Tænd/sluk: The Quantum ES 2 powers on automatically when connected via USB-C to your computer. To power off, disconnect the USB-C cable or use the power button on the rear panel if applicable.
- Multi-Function LED Encoder: This large knob controls various parameters. Press it to cycle through functions like input gain and output volume. Rotate to adjust the selected parameter.
- Input/Output Metering: The bright LED meters provide visual feedback for your input and output levels. Aim for levels that are strong but do not consistently peak into the red.
3.2 Input and Gain Control
- MAX-HD Mic Preamps: The two mic preamps offer +75 dB of gain. Adjust gain using the Multi-Function LED Encoder or via the Universal Control app/Studio One.
- 48V fantomstrøm: Tryk på 48V button on the front panel to enable phantom power for condenser microphones. Ensure phantom power is only used with microphones that require it.
- Auto Gain: Tryk på Auto button to automatically set optimal gain levels for your connected microphones or instruments. This feature helps achieve recording-ready levels quickly.
- Instrumentindgange: The front-facing instrument inputs are optimized for guitars and basses. Ensure the correct input is selected for your instrument.
3.3 Monitoring and Outputs
- Hovedudgange: Control the volume of your main studio monitors using the Multi-Function LED Encoder when the main output is selected.
- Hovedtelefonudgang: Adjust headphone volume independently.
- Softwareovervågning: The Quantum ES 2 relies on software monitoring through your Digital Audio Workstation (DAW). To hear your live input, you must enable input monitoring within your DAW (e.g., "Input Echo" in Cakewalk, or similar features in Studio One, Reaper, Pro Tools). This routes the input signal through the DAW to your outputs.
- Loopback Audio: This feature allows you to route audio from your computer's playback directly back into the interface for recording or streaming, simplifying the creation of monitor and streaming mixes.
3.4 Universal Control App Integration
The Universal Control app provides comprehensive control over your Quantum ES 2 settings from your computer or mobile device. This includes preamp gain, phantom power, and other critical functions, allowing for precise adjustments without interrupting your recording session.
4. Vedligeholdelse
- Rensning: Brug en blød, tør klud til at rengøre enhedens yderside. Undgå slibende rengøringsmidler eller opløsningsmidler.
- Opbevaring: Store the Quantum ES 2 in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Firmwareopdateringer: Periodically check the PreSonus website for firmware updates for your Quantum ES 2. Updates can improve performance and add new features.
5. Fejlfinding
5.1 No Power/Device Not Recognized
- Ensure the USB-C cable is securely connected to both the Quantum ES 2 and your computer.
- If using an older computer or experiencing power issues, connect an external power supply to the optional Aux Power Port.
- Verify that the correct drivers are installed via PreSonus Universal Control.
- Try a different USB-C port or cable.
5.2 No Audio Input/Output
- Check all cable connections (microphones, instruments, monitors, headphones).
- Verify input gain levels on the Quantum ES 2 and within your DAW.
- Ensure phantom power (48V) is enabled for condenser microphones if required.
- Confirm that the Quantum ES 2 is selected as the audio input/output device in your computer's sound settings and your DAW.
- For live input monitoring, ensure input monitoring is enabled within your DAW.
- Check the LED meters on the Quantum ES 2 to see if an input signal is present.
5.3 Latensproblemer
- Juster bufferstørrelsen i din DAW's lydindstillinger. Lavere bufferstørrelser reducerer latenstid, men kræver mere CPU-kraft.
- Ensure you are using the latest PreSonus drivers.
- Luk unødvendige programmer, der kører i baggrunden.
- For Windows users, optimizing your system for audio (e.g., disabling HPET, adjusting power modes) can help. Refer to PreSonus support resources for detailed optimization guides.
6. Specifikationer
| Varens vægt | 1.5 pund |
| Produktdimensioner | 6.2 x 6.9 x 1.9 tommer |
| Varemodelnummer | Quantum ES 2 |
| Kompatible enheder | Personal Computer, Microphone, Headphones, Speakers |
| Hardware-interface | USB |
| Understøttet software | Studio One |
| Operativsystem | Windows, macOS |
| Voltage | 120 volt |
| Forbindelsesteknologi | USB |
| Antal kanaler | 2 |
7. Garanti og support
PreSonus products typically come with a limited warranty. For detailed warranty information, please refer to the warranty card included with your product or visit the official PreSonus webwebsted.
For technical support, driver downloads, firmware updates, and additional resources, please visit the PreSonus support page: www.presonus.com/support.





