LANG PEQ-2 by Heritage Audio EQ plugin interface

LANG PEQ-2: Transistor Pultec-Style EQ Plugin by Heritage Audio

LANG PEQ-2 is a native EQ plugin by Heritage Audio that recreates the rare Lang PEQ-2 Program Equalizer, often called the Transistor Pultec. It is available in VST3, AU and AAX formats for macOS and Windows.

VST3AUAAXWindowsmacOS64-bit

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01Overview

The original Lang PEQ-2 was produced in very small numbers, and Heritage Audio relaunched the brand in 2022 with a reissue of the hardware. This plugin carries that unit's design into a DAW. It offers independent Boost and Droop (Cut) controls for the high and low bands, along with a variable Q control on the high peak boost. The layout is kept simple, and the developer says the plugin is built to be musical and creative rather than purely corrective.

Best for

Mix bus tonal shaping
Vocal EQ coloration
Bass low-end weight
Creative sound design EQ
Drum bus enhancement

Developer: Heritage Audio
Category: EQ
Store: Plugin Boutique

02Key features

What you get

Models the rare Lang PEQ-2 Program Equalizer, the Transistor Pultec
Based on Heritage Audio's 2022 hardware reissue
Independent Boost and Droop (Cut) for high and low bands
Boost and cut at the same or similar frequencies for unique curves
Low Shelf Boost and Cut and High Shelf Cut
High Peak Boost with variable Q (Bandwidth)
Boost range adapts to the selected Bandwidth
Native VST3, AU and AAX formats

03In depth

Sound and Character of the Lang PEQ-2 Plugin

The PEQ-2 is known for interactions that go beyond a standard equalizer. Because boost and cut can be applied at the same or similar frequencies, you can build unusual EQ curves that shape tone in ways a conventional parametric EQ would not easily produce. Heritage Audio describes the plugin as a faithful recreation of the hardware, meticulously modeled after its 2022 reissue.

The boost range adapts to the selected Bandwidth setting, which the developer says keeps the response smooth and natural across the Q range. Experimentation is central to how the unit is used.

Controls and Workflow in the PEQ-2 EQ

The main controls are Boost and Droop (Cut) for both the high and low bands. The low band offers Low Shelf Boost and Cut, and the high band offers High Shelf Cut and High Peak Boost. The High Peak Boost includes a variable Q (Bandwidth) control that runs from sharp to broad.

The layout is intentionally simple, so the plugin can be used quickly on a mix bus, a single instrument or a sound design layer without a long learning curve.

04Specs

Will it run?

Formats, systems and requirements as listed by Plugin Boutique. Missing details are left out, not guessed.

Developer	Heritage Audio
Type	Plugin
Category	EQ
Formats	VST3, AU, AAX
Operating systems	Windows, macOS
Architecture	64-bit

05FAQ

Questions, answered

What is the LANG PEQ-2 plugin?

LANG PEQ-2 is a Heritage Audio EQ plugin that recreates the Lang PEQ-2 Program Equalizer. The original hardware is often called the Transistor Pultec.

Which formats and operating systems does LANG PEQ-2 support?

The plugin is available in VST3, AU and AAX, 64-bit. It runs on macOS 10.15.7 and later, including Intel and Apple Silicon M1, M2 and M3 Macs, and on Windows 10 and 11.