STA Preamp 2
"Five tube circuits in a simple saturator"
Adding 5 types of valve saturation to your tracks, the STA Preamp is the core effect of the STA series.
Software product, electronic download, immediate delivery.
Exact model of valve circuits
Audified studio tools help to save time and make your workflow easier
This effect offers advanced calibration (headroom adjustment) - the relation between the digital and analog levels.
Compatible with MacOS and Windows
Plug-in in AAX, Audio Unit and VST format compatible with all major audio workstations


The precise simulation of several valve circuits gives the STA effects their unique analog feel and warmth.

Powerful DSP delivering 7 algorithmic reverbs
Perfect high-end tube sound
Really unique and warm character
5 valve circuit modes available
Precise circuit simulation
Universal use

One of the six

STA Effects is a bundle of six plug-ins containing the Flanger, Phaser, Chorus, Delay and Enhancer. The sixth one, the Preamp, is the core engine to all of these. It became so popular among users that we were forced to also offer it as a standalone product.

Five valve circuit modes available

The valve saturation colour of the STA Effects depends on the Mode selection. Changing the type of the tube circuit affects the tube working point and frequency response.

  • P - Presence – a higher amount of mid-high frequencies allows better cutting through the mix.
  • V - Vintage – has smoother highs and more even harmonics.
  • B - Brown – has an almost flat response with only light high frequencies rolling off and nice higher harmonics punch.
  • W - White – has a higher amount of higher frequencies and a balanced ratio between the even and odd harmonics.
  • L - LoFi – contains less low and high frequencies. We make our plug-ins as real as possible with all the natural analog feeling and side effects.


Common effects

The ordinary digital effects mix their wet and dry signals as simple as A+B=C. This is as cool as all standards you may rely on. When we deal with vacuum tubes, there is also another aproach possible.

Summing on a tube

STA (Summing Tube Amplifier) uses two signal paths, one is processed by modulation or spectral change and the other is not processed. These two signals are mixed using a vacuum tube. This gives “ordinary” effects like Flanger or Phaser a really unique and warm character.

Technical info

System requirements of the selected product. For some effects and applications, we have versions compatible with older systems. Please visit the Downloads page and browse the available versions if your system is older than specified here.

Mac OS X 10.9 - Mac OS X 10.12
AAX 32b, AAX 64b, AU 32b, AU 64b, VST2 32b, VST2 64b, VST3 32b, VST3 64b
Windows 7 - Windows 10
AAX 32b, AAX 64b, VST2 32b, VST2 64b, VST3 32b, VST3 64b

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