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Products - PTC-2A Vintage Pultec EQ - Plug-In for Mac and PC View Cart / Checkout

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Windows and Mac
Free Demo for Mac & PC
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Activation Key
(Windows and Mac)
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DEMO MODE Restrictions:
Every 60 seconds the audio will fade out momentarily. To remove these restrictions you will need to purchase an activation key.

Previous releases for Mac OS X v 10.5.8 - 10.8 (32 and 64Bit) can be downloaded from the link below.

[ Earlier Versions ]
The classic signature sounds of one of the world's most sought-after vintage EQs, emulated for Mac and PC.
Even with modern digital equalizers, low-end boost can come at the expense of focus and definition.
The elegant simplicity of the vintage Pultec design is renowned for its signature 'low-end trick' - the ability to boost and cut low frequencies at the same time, adding powerful, tight bass boost without sacrificing detail.
The PTC-2A emulates the signature vintage Pultec sounds, replicating the unique ability to sculpt the EQ curve with separate boost and attenuate controls, while innovative algorithms provide a genuine analogue filter response without requiring conventional CPU intensive techniques.
A transformer-coupled tube amplifier emulation further enhances the vintage qualities, adding subtle character even with the EQ bypassed.
[ More Info ]
System Requirements - Windows PCs:
  • 32Bit Systems: A PC Running Windows XP / 7 / 8 and a VST compatible host application.
  • 64Bit Systems: A PC Running Windows 7 / 8 (64Bit) and a VST or VST3 compatible host application.
System Requirements - Mac:
  • Requires 64Bit Mac OS X v.10.7 or later.
  • A 64Bit AudioUnit, VST or VST3 compatible host.
  • Download includes AudioUnit, VST and VST3 for Mac (64Bit)
Mac versions are now provided as signed packages, for compatibility with Mac OSX Gatekeeper.
Existing activation codes for V1.x plugins are valid for V2.x - please read the installation information for Mac provided in the download.

[ Demo Video ] Using the PTC-2A on a simple drum loop, applying the signature Pultec 'low-end trick'.

Latest Version:
Mac Audio Unit 64Bit Only   V2.1.0
Mac VST 64Bit Only   V2.1.0
Windows VST 32 and 64Bit   V2.1.0
Separate LF Boost and Attenuate Controls   Simultaneous low frequency boost and cut, emulating the classic Pultec 'Low-end trick'.
Physical Control Weighting   Replicates the 'feel' as well as the look of high quality rotary controls.
Passive Filters   6dB / Octave passive filter emulation maintains the smooth frequency response and desirable control interaction of the original vintage designs.
Transformer-coupled gain stage   Similar to the original Pultec EQs, the passive filters are followed by a transformer-coupled tube amplifier stage which further enhances the vintage qualities.
Analogue Filter Modelling   Analogue Filter Modelling algorithms recreate natural analogue filter curves, without requiring high sample rates or CPU intensive upsampling, allowing more plugin instances in a typical DAW.

VST is a trademark of Steinberg Media Technologies GmbH
OverToneDSP branded plugins are authorized ports of linuxDSP software to Windows and other operating systems.

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