Heritage Audio Lang PEQ-2 Program Equalizer Plug-In

First resurrected in hardware form by Heritage Audio, and now offered in an authentic-sounding plug-in form, the Lang PEQ-2 Program Equalizer is a powerful digital adaptation of this famed Transistor Pultec unit. With the ability to simultaneously boost and cut highs and lows with independent frequency and gain controls, this plug-in allows for adventurous processing.

A Secret Weapon for the Last 60 Years

The Lang PEQ-2 Program Equalizer was almost lost in time before Heritage Audio bought and relaunched the brand in 2022. Not very many units were made and those that have survived until today are carefully guarded by their lucky owners. Also known as the Transistors Pultec, as both units are based on the same patented Western Electric design, those that are lucky enough to still have them have stated that they have become their secret weapon.

A Plug-In that Honors the Hardware

While having a very simple and easy layout, the PEQ-2 can be deceiving as it is actually capable of some very extreme processing all while maintaining the musicality of your signal. With independent controls for Boost and Droop (Cut) for both the High and Low bands you can quickly transform your material in interesting, creative ways that you have almost certainly never considered before. The ability to boost and cut at the same or similar frequencies produces exciting new equalized response curves. Experimentation is key, but you will quickly realize just how powerful this feature can be.

Variable Bandwidth

Not only does the PEQ-2 offer Low Shelf boost and cut control and High Shelf cut, but it also has a High Peak Boost with a completely variable Q (Bandwidth) setting that spans from Sharp to Broad to cover any needs. What's more, the range of Boost actually varies depending on what your selected Bandwidth setting is to offer a very smooth and natural response at all times.

Equalizer Controls

LF Boost control with 0 to 16 dB gain range

LF Boost frequency control from 20 to 240 Hz

LF Droop (cut) gain knob with 0 to 18 dB range

LF Droop frequency control from 25 to 200 Hz

HF Boost Bandwidth (Q) control from Sharp to Broad

Gain knob for HF Boost from 21 to 12.5 dB depending on Bandwidth setting

HF Boost frequency knob control from 2.5 to 20 kHz

HF Droop gain control from 0 to 16 dB

HF Droop frequency selection from 2.5 to 20 kHz

Free for PEQ-2 Hardware Owners

Heritage Audio's goal is to create helpful tools to channel creativity and put the focus back on music production. That is why they want to reach as many users as possible with a comprehensive and fair pricing scheme. Therefore, all Lang PEQ-2 hardware owners will get the Lang PEQ-2 native plug-in for free and all i73 PRO owners will get both Lang PEQ-2 native and the DSP plug-in for free.