Coming soon

BIAS Desktop

BIAS Desktop is a plug-in for Mac OS X and Windows with which you can create amp models in a new way never before thought possible.

The BIAS Explorer Program is designed for people who want to get involved early to shape the future of BIAS. If you’re interested, please sign up here and we’ll let you know if a spot opens up.

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Amp Design

Create totally new sounds by designing your custom dream amp.

Users can easily modify amp models by swapping out the tubes, preamp, transformer, tone stacks, cab and mic with simple mouse clicks to create their own custom amps and unique signature sound.

The result is a dynamic depth and range of tones not possible using traditional guitar amps or other static modelers.

Amp Match

Accurately capture the sound of all your favourite tube amps.

Amp Matching utilizes a collection of underlying technologies to analyze and compare your currently selected BIAS amp model and the sound of a target tube amplifier, the corresponding cabinet and the microphone in front of it. It then executes the tonal compensation and enhancement needed to make your amp model accurately match the target tube amplifier.

Amp Share

Share and download artist- and user-designed and matched amps right inside Positive Grid’s ToneCloud®.

The tone-creation possibilities are now virtually infinite with BIAS. Download artists’ signature amps, or try out the latest and popular user-created-matched amp models.

Amp Matching Test 1

Fluff shows how to use BIAS to match a nice Hiwatt Custom 50.

Amp Matching Test 2

Fluff shows how to use BIAS to match his own Randall Thrasher Channel 1.



  • The most complete, accurate, and versatile amp modeling software available in the world
  • 36 HD amp models included with the introductory release
  • Amp Matching captures any miked amp or recorded track and creates a matched model
  • Share and download thousands of artist- and user-created and matched amp models on ToneCloud
  • Fully customizable preamps, tone stacks, power amps, transformers, cabinets and mic selection and placement—mix and match!
  • Customize the look and feel of your own amp panel; change the name, tolex, panel and knobs.
  • Works the way guitarists think: tweak gain and overdrive, swap out tubes and transformers, change the cabinet and mic position, and shape the tone with different tone stacks and two 8-band equalizers
  • Included noise gate and room simulator
  • Create a virtually unlimited number of custom amps
  • Quick preset facility recalls each of your 8 favorite settings in turn with just one tap

Mac® (64 bit CPU, 32- or 64-bit Mac OS X)

  • Minimal: 1.5 GHz Intel processor, 1 GB of RAM, Mac OS X 10.6 or later.
  • Supported Plug-in formats: Audio Units, VST, RTAS, AAX (32 and 64-bit).

Windows® (32 and 64 bit)

  • Minimal: Intel® Pentium 4® 2.4 GHz or Intel® Core™ Duo or AMD Athlon™ 64, 1 GB of RAM, Windows® XP, Windows® Vista, Windows® 7, or Windows® 8.
  • Supported Plug-in formats: VST, RTAS, AAX (32 and 64-bit).