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Presonus Quantum 26x32 Thunderbolt 2 Audio Interface

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Quick Overview

Record with the Power of Thunderbolt

Quantum 26x32 Thunderbolt™ 2 Audio Interface/Studio Command Center

Your expandable, ultra-high definition recording system.

Taking full advantage of the high-speed Thunderbolt™ 2 bus and ADAT Optical I/O, the PreSonus® Quantum audio/MIDI interface delivers up to 26 inputs and 32 outputs, with extremely low latency. Boasting superb audio quality; 24-bit, 192 kHz recording and playback; recallable XMAX microphone preamps; and the ability to expand your system as your needs grow, it’s a great choice for a wide variety of professional and semi-pro producers and electronic musicians.


We cut the wait.

Every design decision during Quantum’s engineering was made with one goal in mind: speed. Quantum sports high-speed Thunderbolt 2 connectivity and a no-frills, direct-to-DAW architecture, with no DSP. The result is our leanest, fastest, lowest-latency interface to date.

Cutting-edge 24-bit, 192 kHz converters with 120 dB of dynamic range and a surprising amount of expandability and software control options round out the package.


Expandable when you need more I/O—up to 96 in and out.

The Quantum offers two combo mic/line/instrument inputs and six combo mic/line inputs, each with a digitally-controlled XMAX preamp and individual +48V phantom power. You also get two ¼-inch TRS main outputs, eight ¼-inch TRS aux outputs, and two independent headphone outs with dedicated volume controls. But that’s just the start. With ADAT Optical I/O and S/PDIF stereo digital I/O, you can have up to 18 digital inputs and outputs. And if you need even more I/O channels, you can stack up to four Quantum interfaces via Thunderbolt to create a monster system with up to 96 in and out. BNC word clock I/O ensures your Quantum and other digital audio devices operate in tight sync. And of course you get MIDI I/O, too.


Superior sound.

Audiophile-grade digital converters, low-jitter clocking, and recallable preamps add up to a superior recording and listening experience. The Quantum operates at up to 192 kHz for ultra-high-definition mixing and recording. High-quality converters on every input and output provide 120 dB of dynamic range to capture complex musical harmonics smoothly and naturally with no audible distortion. And our recallable XMAX Class A analog microphone preamps deliver incredibly high headroom, deep lows, smooth highs, and a rich overall sound so you’ll hear every breath, transient, and detail in your recordings.


A superior choice for any production environment.

With its pro features and abundant I/O, the Quantum fits into any recording and production environment. You get two main and eight auxiliary balanced line-level outputs, as well as Mute/Dim and Mono controls. The onboard talkback mic can be routed to any mix, and you can listen to any mix from either of two independent headphone amps. All 10 analog outputs are DC coupled so they can provide control voltage to external analog equipment. Add that to Quantum’s expandability, flexible software suite, blazing speed, and superb sound quality, and you have a recording system that will be the heart of your dream studio for years to come.


Tight integration with Studio One.

With the Quantum, your audio interface is an integrated extension of your recording environment. Launch Studio One®, and you’ll find full preamp control integrated into your recording environment. Need to track away from your computer? Launch Studio One Remote on your iPad®.

Quantum customers get 50% off upgrades to Studio One Professional.


Remote control with UC Surface, too!

The Quantum’s onboard features can also be controlled in PreSonus’ free UC Surface control software, so even if you use third-party recording software, you can remotely access them. We even included a real-time analyzer to monitor your audio streams. UC Surface has rapidly won accolades for an intuitive mixing interface that provides quick access to everything you need.

Now includes Studio Magic plug-in suite.

This suite of plug-ins brings extended sonic functionality into Studio One. Cherry-picked from the first names in virtual instruments and effects, each one brings a different flavor of practical magic to your songs. These plug-ins aren't gimmicky one-trick ponies — these are real-deal workhorses that you'll find yourself relying on for countless mixes.



General Features

26x32 Thunderbolt 2 ultra-low-latency audio interface
PreSonus’ fastest interface; record direct to DAW (no DSP)
Stack up to four Quantum interfaces via Thunderbolt for a monster system
Talkback switch and internal Talkback microphone
Mute/Dim and Mono switches
Assignable output level control
10 8-segment LED meters (8 input, 2 output)

Integrated Software

Tight integration with included Studio One® Artist DAW software (Mac/Windows) for multitrack music production and studio command features
Wireless control over preamp levels from free UC Surface touch-control software (Mac®/Windows®/iPad®) and from free Studio One Remote for iPad
Compatible with most recording software for Mac and Windows

Flexible Connectivity

Simultaneous I/O up to 26 inputs/32 outputs (at 44.1 or 48 kHz)
2 front-panel combo microphone/instrument/line inputs
6 rear-panel combo microphone/line-level inputs
8 XMAX remote-controllable, Class A mic preamps with individually switched 48V phantom power
2 balanced ¼” TRS line-level main outputs
8 balanced ¼” TRS line-level outputs
Line outputs are DC coupled for sending control voltages for analog gear
ADAT Optical/Dual SMUX inputs/outputs: 16x16 channels at 44.1 or 48 kHz; 8x8 channels at 88.2 or 96 kHz
Stereo S/PDIF coaxial input and output
2 high-volume headphone outputs with dedicated volume controls


Thunderbolt 2 high-speed bus
24-bit resolution and up to 192 kHz sampling rate
Top-quality 120 dB A/D/A converters
BNC word clock input and output with low-jitter clocking
MIDI I/O on 5-pin DIN connectors


Road-rugged construction with all-metal chassis and metal knobs
1U rack-mountable
12 VDC external power supply (included)

Computer system requirements:

Below are the minimum computer-system requirements for UC Surface, QMix®-UC, and Studio One®.


  • Mac® OS X 10.11.6 or later
  • Intel® Core™ i5 processor or faster
  • 4 GB RAM (8 GB or more recommended)


  • Windows® 10 64-bit
  • Intel Core i5 processor or faster
  • 4 GB RAM (8 GB or more recommended)

Mac and Windows Systems

  • Thunderbolt 1 or 2 port (Computer’s motherboard must support Thunderbolt; Thunderbolt 3 systems supported with qualified Thunderbolt 2 adapter.)
  • Internet connection (required for registration and download of included software)
  • 30 GB hard disk space (7200 RPM storage drive or faster highly recommended)
  • Monitor with 1366x768 resolution

iOS (UC Surface)

  • iOS 9.3 or later
  • iPad Pro, iPad Air 2, iPad Air, iPad mini 4, iPad mini with Retina display, iPad (4th generation), iPad mini, iPad (3rd generation), iPad 2

Android (QMix-UC)

  • Android™ 5.0 (Lollipop) or later
  • Android smartphone or tablet
Note: The minimum system requirements may differ for DAWs other than Studio One. Please check the requirements for your DAW of choice with its manufacturer.
Note that the speed of your processor, amount of RAM and size and speed of your hard drive will greatly affect the overall performance of your recording system. Also, a more powerful system (faster processor with more RAM) will allow for lower latency (signal delay) than you might experience while monitoring audio signals.


Technical Specifications

Microphone Preamp 
TypeXLR Female (via Combo), Balanced
Maximum Input Level+10 dBu (Balanced, min. gain)
Gain Control Range60 dB
Frequency Response20 Hz to 20 kHz (±0.15 dB, unity gain, 48 kHz)
20 Hz to 40 kHz (±0.22 dB, unity gain, 96 kHz)
Dynamic Range> 110 dB (A-wtd, min. gain)
Total Harmonic Distortion< 0.005% (1 kHz, min. gain)
EIN< -131 dBu (max gain, 40Ω, 22 kHz BW, A-wtd)
Input Impedance1.6 kΩ
Phantom Power+48V, > 8 mA per input
Instrument Inputs 
Type¼” TS Female (via Combo), Unbalanced
Maximum Input Level+15 dBu (Unbalanced, min. gain)
Gain Control Range60 dB
Frequency Response20 Hz to 20 kHz (±0.2 dB, unity gain, 48 kHz)
20 Hz to 40 kHz (±0.6 dB, unity gain, 96 kHz)
Dynamic Range> 106 dB (A-wtd, min. gain)
Total Harmonic Distortion< 0.005% (1kHz, min. gain)
Input Impedance> 1 MΩ
Line Inputs 
Type¼” TRS Female (via Combo), Balanced
Maximum Input Level+ 18 dBu (Balanced, min. gain)
Frequency Response20 Hz to 20 kHz (±0.05 dB, unity gain, 48 kHz)
20 Hz to 40 kHz (±0.10 dB, unity gain, 96 kHz)
Dynamic Range> 118 dB (A-wtd, min. gain)
Total Harmonic Distortion< 0.005% (1 kHz, min. gain)
Input Impedance10 kΩ
Main and Line Outputs 
Type¼” TRS Female, impedance balanced
Maximum Output Level+18 dBu (Balanced)
Frequency Response20 Hz to 20 kHz (±0.05 dB, unity gain, 48 kHz)
20 Hz to 40 kHz (±0.15 dB, unity gain, 96 kHz)
Dynamic Range> 118 dB (A-wtd)
Total Harmonic Distortion< 0.0035% (1 kHz, +4 dBu)
Output Impedance51Ω
Headphone Outputs 
Type¼” TRS Female, Stereo, Unbalanced, x2
Maximum Output Level175 mW/channel (56Ω load)
Frequency Response20 Hz to 20 kHz (±0.5 dB, 48 kHz)
Dynamic Range> 110 dB (A-wtd)
Total Harmonic Distortion< 0.03% (1 kHz)
Headphone Impedance (working range)16Ω to 300Ω
Input to Input< -110 dB
Output to Output< -115 dB
Input to Output< -120 dB
Signal Level LEDs 
Clip-0.5 dBFS
Signal 1-2 dBFS
Signal 2-4 dBFS
Signal 3-6 dBFS
Signal 4-10 dBFS
Signal 5-20 dBFS
Signal 6-30 dBFS
Signal 7-50 dBFS
Digital Audio 
Connection TypeThunderbolt 2
ADC Dynamic Range120 dB (A-wtd)
DAC Dynamic Range120 dB (A-wtd)
Bit Depth24 bits
Internally Supported Sample Rates44.1, 48, 88.2, 96, 176.4, 192 kHz
Jitter< 70 ps RMS (20 Hz – 20 kHz)
Jitter Attenuation> 60 dB (1 ns in => 1 ps out)


 12 VDC, 5A, external power supply


Height1.75" (44.45 mm)
Depth7" (177.8 mm)
Width19" (482.6 mm)
Weight6 lbs (2.72 kg)