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ST2 Pro logo

(This Product is Discontinued)

Adopted by countless studios around the world over the past 10 years the ST2 Pro is Trinnov Audio entry level professional audio processor it features our unique loudspeaker/room optimization technology, with up to four simultaneous processing channels.


Trinnov’s ST2 Pro stereo processor is the ideal monitoring solution for cinema, post-production, broadcast and mastering studios. Sound engineers demand highly accurate monitoring to work with subtlety on effects, EQs, and dynamics.

It’unique loudspeaker and room correction technology will take your audio monitoring chain to the next level, resulting in mixes that translate better through various listening environment and broadcast norms, therefore, increasing repeatability and consistency for better time efficiency.

Digital Audio Connectivity

  • AES3 Inputs (XLR): x2
  • AES3 Outputs (XLR): x2
  • Wordclock (BNC): x1 Input, x1 Output

Analogue Audio Connectivity

  • Balanced Inputs (XLR): x4
  • Balanced Outputs (XLR): x4
  • Analog Input Impedance: 20K ohms

Audio Processing

  • ADC Resolution / Sampling Rate: 24 Bits/96 kHz
  • DAC Resolution / Sampling Rate: 24 Bits/192 kHz
  • A/D Signal-To-Noise Ratio: 119 dB (A-Weighted)
  • D/A Signal-To-Noise Ratio: 118 dB (A-Weighted)
  • Processing Sampling Rate: Native, up to 192kHz
  • Processing Resolution: 64 bits floating point
  • Clock / Jitter: attenuation > 50 dB Above 100Hz

Power Supply

  • Power requirement: 240V / 110V - 50 / 60Hz (Manual Switch)
  • Power consumption: 40W
  • Mains fuse: 1A slow blow
  • Analogue section PSU: Dedicated linear PSU with toroidal transformer
  • Digital section PSU: Switch-mode PSU

Weight & Dimensions

  • Dimensions (W x H x D) mm: 444 x 89 x 405
  • Dimensions (W x H x D) inches: 17 1/2" x 3 1/2" x 16"
  • Shipping box dimensions (W x H x D) cm: 68 x 56 x 21
  • Weight: 8.80kg / 19.4 lbs
  • Shipping weight / volume: 11.6kg / 0.08 M3
  • Rackmounting: 2U - Fixed Rack Ears


  • GPIO Remote: 8 in / 4out (DB25)


  • Standard Warranty: 2 year
  • Transferable: Yes


The Optimizer automatically time aligns your speakers with more precision than a human could achieve with a tape measure. Time alignment alone makes a huge difference in terms of stereophonic image, but by working in the time domain and improving both the amplitude and phase response of the loudspeakers, the Optimizer achieves high-resolution stereophonic image and well-focused phantom sources simply not achievable otherwise.

Before and After Trinnov Optimization


The Optimizer provides you with a unique set of data and comprehensive toolbox to get the absolute best from your speakers in any given room. With a single measurement, the Optimizer gives you both the direct response and the global acoustic response of your speakers in the room.

You can then define the target curve that will best meet your loudspeakers characteristics whilst optimizing its global acoustic response. The Optimizer automatically defines the filters that will achieve the required frequency response specified by your target curve. This is particularly useful in post-production studios to comply with SMPTE standards (X-Curve).


Trinnov’s sophisticated multi point algorithm can take into account the measurements of different positions to perform the optimization.
A higher weighting may be assigned to the most critical listening position(s), and lower weighting to the remaining points.

Therefore you can create instantly recallable listening positions letting you listen at the sweetest spot wherever you or the producer may sit in the room, making sure the production team hears the same content as you do.

Unique Phase Correction

The Trinnov ST2 provides highly accurate monitoring by improving the phase response of every speaker offering a wider stereo image and more focused phantom sources.

The Optimizer is the only system on the market that not only compensates for the phase response of a loudspeaker but actually shows you what it does with acoustic graphs where you can see the before and after phase response for any given measurement position.

Before and After Trinnov Optimization


Simply called Trinnov App this new free application for all our users will become a staple in your dock and facilitates set-up and use of all Trinnov processors.

This new macOS App lets you discover all Trinnov machines currently on your network. From it, you can execute basic essential functions from saving and loading presets to control volume or dim and mute. As well no more need of VNC you can now directly launch the web application of your machine(s) to perform a new set-up or calibration.

Trinnov App Download

Trinnov App Manual

What Do Others Say?

  • Photo of Phil Ward

    If your efforts in audio production have long left behind the bedroom music hobby stage and it’s vitally important that the work that leaves your studio is mixed and balanced to the highest professional standards, and will translate out there in the commercial world, the ST2 could be a tool that’s absolutely justified.

    Phil Ward
    Sound On Sound Magazine (US)
  • Photo of Jan Stan Kybert

    The Trinnov remains the greatest single bit of mix equipment I’ve ever used. Nothing else improves every other bit of gear in the studio like Trinnov does. Microphones, outboard and plugins are all improved!

    Jan Stan Kybert
    (Paul Weller, Oasis, Massive Attack)
  • Photo of Hank Linderman

    Even if you got an unlimited budget for speakers and room treatment, there are specific phase issues you can’t get rid of, and for me, the Trinnov fixes those. So even if your room and speakers are states of the art, I believe you would see some serious improvement using a Trinnov.

    Hank Linderman
    Sound Engineer (The Eagles, Chicago, Diana Krall, America)
  • Photo of Greg Wells

    The mixes I’m doing sound better elsewhere, like my car. It’s a deeper more Hubble telescope view into the great sonic unknown. I’m not leaving home without it!

    Greg Wells
    (Adele, Taylor Swift, Ariana Grande, Aerosmith, Quincy Jones, Elton John)
  • Photo of Pete Lyman - Mastering Engineer

    The ST2 Pro is definitely one of the strongest points in my monitoring chain, it's a tool that allows you to get the job done without anything obscuring your vision, this is the way to get world-class results almost anywhere.

    Pete Lyman - Mastering Engineer
    (The Who, Weezer, Tom Waits, Phish)
  • Photo of Lovy Longomba - Mixing Engineer

    The first time when I pushed play I was like way way what ? Not only the amplitude but the phase correction I mean to be honest I thought it was witchcraft!

    Lovy Longomba - Mixing Engineer
    (Akon, Jason Derulo, Iggy Azzalea)

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