1. Folasaga
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.

Ata 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. Seti
2.1 Ta'ese'esega ma Fa'aputuga o mea
Before proceeding, ensure all components are present in the package:
- PreSonus Quantum ES 2 USB-C Audio Interface
- USB-C ile USB-C Uaea
- Power Supply (if not bus-powered, check specific model)
- Taiala vave amata
- Product Registration Card (for Studio One Pro license)
2.2 So'oga Meafaigaluega
Follow these steps to connect your Quantum ES 2:
- Feso'ota'i ile komepiuta: 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.
- Fesootai Microphones/Meafaigāluega:
- For microphones, use XLR cables to connect to the Mic/Lina I totonu combo jacks on the rear panel.
- For guitars or basses, use 1/4-inch TS cables to connect to the Guitar/Bass Inputs i luga o le laulau pito i luma.
- Feso'ota'i Mataitu: Fa'afeso'ota'i au mata'itu o le potu fa'atino i le Autu Autu (balanced 1/4-inch TRS) on the rear panel using appropriate cables.
- Fa'afeso'ota'i Fa'alogo: Plug your headphones into the Stereo Headphone Out i luga o le laulau pito i luma.

Ata 2.1: Fa'asaga i lumaview 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.

Ata 2.2: Fa'asaga i tuaview 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 Fa'apipi'i polokalame
To fully utilize your Quantum ES 2, you will need to install the necessary software:
- Resitala lau oloa: 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.
- Fa'apipi'i Aveta'avale: Universal Control will install the custom low-latency drivers required for optimal performance of your Quantum ES 2.
3. Fa'atonuga o Galuega
3.1 Galuega Fa'avae
- Malosi/Pepe: 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 Malosi Fa'aleagaga: Oomi le 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: Oomi le Ta'avale button to automatically set optimal gain levels for your connected microphones or instruments. This feature helps achieve recording-ready levels quickly.
- Mea Fa'aulufalega: 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
- Galuega Autu: Control the volume of your main studio monitors using the Multi-Function LED Encoder when the main output is selected.
- Fa'auluuluga Fa'aulu: Adjust headphone volume independently.
- Mata'ituina o polokalame: 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. Tausiga
- Fa'amamaina: Faaaoga se ie vaivai ma mago e faamama ai le pito i fafo o le iunite. Aloese mai vailaau faamama po o vailaau fa'amama.
- Teuina: Store the Quantum ES 2 in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Faʻalauiloa Firmware: Periodically check the PreSonus website for firmware updates for your Quantum ES 2. Updates can improve performance and add new features.
5. Faʻafitauli
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.
- Taumafai i se isi uafu po'o se uaea USB-C.
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 Latency Issues
- Fetuuna'i le lapo'a o le pa'u i le fa'alogo a lau DAW. O lapopo'a la'ititi la'ititi e fa'aitiitia ai le leo ae mana'omia le tele o le malosi ole PPU.
- Ensure you are using the latest PreSonus drivers.
- Tapuni talosaga le mana'omia o lo'o ta'avale i tua.
- 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. Fa'amatalaga
| Mea mamafa | 1.5 pauna |
| Fua o Mea | 6.2 x 6.9 x 1.9 inisi |
| Numera Fa'ata'ita'i Mea | Quantum ES 2 |
| Masini Fegalegaleai | Personal Computer, Microphone, Headphones, Speakers |
| Ofisa o mea faigaluega | USB |
| Polokalama Lagolago | Studio Tasi |
| Faiga Fa'atonu | Pupuni, macOS |
| Voltage | 120 Volts |
| Tekinolosi Feso'ota'i | USB |
| Numera o Auala | 2 |
7. Fa'amaonia ma Lagolago
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 webnofoaga.
For technical support, driver downloads, firmware updates, and additional resources, please visit the PreSonus support page: www.presonus.com/support.





