Heritage Audio

Lang PEQ-2

Passive program EQ

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Lang PEQ-2 line art

The LANG PEQ-2 has been a powerful secret weapon for many during the last 60 years and is now available once again thanks to the rebirth of LANG Electronics Inc.

Heritage Audio recently acquired Lang Electronics Inc., a professional audio company from the 1960s. Their most desired product was the Lang PEQ-2 Program Equalizer. Not many were made, and those that have survived are carefully guarded by their lucky owners. After months and months of studying the originals, the PEQ-2 has been reborn!

Notable users of the original units include Allen Sides, Andrew Sheps and Joe Chiccarelli.

Many prefer the PEQ-2 to ubiquitous Pultec program equalizers; the PEQ-2 offers a sharper, tighter response ideal for mix bus use. The PEQ-2 has nearly twice as many frequency options to choose from; 26 compared to the Pultec’s 14. The low end is infinitely more controllable as the LANG gives you the ability to boost and cut at different frequencies, unlike the Pultec. There is also a very useful 20 kHz option in the High Peak Boost section.

While having a very simple and intuitive layout, the PEQ-2 is 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 not possible on a Pultec-style EQ. Once you’ve tried shaping your mixes with a PEQ-2, you’ll wonder how you got along without one! The ability to boost and cut at the same or similar frequencies produces exciting new equalized response curves. Experimentation is key!


  • Authentic reissue of the impossible to find LANG PEQ-2
  • Same Western Electric patent as the Pultec with extended functionality and sound tweaking possibilities.
  • Transformer balanced Inputs & Outputs
  • Stepped controls for easy recall and matching
  • High Peak Boost with variable Bandwidth and 20 kHz option
  • Custom inductors and tone capacitors of the same exact type as in the original.
  • High Shelf Cut with extended frequency choices.
  • Low Shelf Boost and Cut each with different frequency selections.