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An introduction to Ignite Amps PTEq-X, based on information from the maker and distributors: what it does, how to use it and who it may suit. It is not scored.
PTEq-X is a digital emulation of 3 famous vintage passive program equalizers.
— Ignite Amps official site
What is PTEq-X?
PTEq-X is a free EQ plug-in from Ignite Amps. The maker describes it as a digital emulation of three famous vintage passive program equalizers.
It reproduces the characteristics of the original hardware, adds circuit improvements and extra features, and is described as a studio EQ for tracking, mixing and mastering.
It has three EQ modules with analog-style curve response at high frequencies. The tube stage uses Ignite Amps' third-generation triode modeling with four tube types. The PEQ1A model adds selectable frequencies, and the MQ5 and HL3C models have refined filter frequency precision.
Formats are VST, VST3 and AU, with downloads for Windows and macOS. It supports mono and stereo, 64-bit double-precision processing, full parameter automation and preset management with bank import/export. It is free on the official site, which also invites donations.
On the official site, PTEq-X is distributed as version 1.1.1 download links on the Ignite Amps front page rather than on a dedicated product page. Separate zip files are provided for Windows and macOS.
The maker says the goal was to match the characteristics of the original hardware while adding circuit refinements and extra features. It is positioned as a studio EQ for tracking, mixing and mastering.
Three vintage EQ modules
Three well-known passive EQs are covered by the PEQ1A, MQ5 and HL3C modules, so you can switch character depending on the material.
Tube-stage modeling
Third-generation triode modeling covers four tube types and can be switched independently from the EQ.
Switchable modules
The EQ and tube stage can be enabled separately to manage CPU load, useful in big sessions.
Linear-phase oversampling
A switchable oversampling option reduces aliasing when you want more precision.
Added frequencies and refined precision
The PEQ1A model offers extra selectable frequencies, and MQ5 and HL3C have refined filter frequency precision.
Mono/stereo and 64-bit processing
Works on mono and stereo with 64-bit double precision, full automation, and bank-style preset import/export.
Analog-style curve at the top end
The maker states that the three EQ modules keep an analog-style curve response even at the highest frequencies. If you pay attention to how a digital EQ shapes the top end, this is a point you may want to compare by ear.
Global input and output level controls
Input and output level controls apply to the whole plug-in. You may use the output side to compensate for level added by the EQ so that before/after comparisons stay at similar loudness.
Fully automatable
Every control can be automated from the DAW, so EQ settings can follow changes in the arrangement.
Proprietary preset management
Presets are handled by the plug-in's own system, with bank file import and export, which helps when you move settings between machines.
Specifications
| Item | Details |
|---|---|
| Version | v1.1.1 |
| Formats | VST / VST3 / AU |
| OS | Windows / macOS |
| Price | Free (donations welcome) |
| Processing | Mono / stereo, 64-bit double precision |
| Tube modeling | 4 types (third-generation triode) |
| EQ modules | PEQ1A / MQ5 / HL3C |
| Distribution | Zip files (separate Windows and macOS downloads) |
| Oversampling | Switchable linear-phase oversampling |
| Level controls | Global input / output |
What is included and system requirements
- VST / VST3 / AU downloads (Windows and macOS)
- Preset management with bank file import/export
- Version 1.1.1 zip (separate Windows and macOS downloads)
How to use it
- Download PTEq-X for your OS from the Ignite Amps website.
- Install it and rescan plug-ins in your DAW.
- Load it as an insert on the track you want to EQ.
- Pick which module (PEQ1A, MQ5 or HL3C) to use.
- Adjust the bands you need and match input and output levels.
- Turn on the tube stage and listen for the change in coloration.
- If CPU load is high, switch off modules you are not using.
- Save settings you use often as presets.
Vocal mixing
You may try it for shaping a voice with passive-EQ-style curves.
Drums, bass and synths
It could help on tracks where you want to lift lows or highs and switch between modules.
Mastering touches
The maker lists mastering as a use, likely with light settings.
An intro to vintage EQs
It may suit trying passive-EQ workflows for free before buying a pricier plug-in.
Adding character to vocals or drums
Inserted on a track, switching modules and the tube stage on and off while listening may help you find the texture you want.
Gentle shaping on the master bus
The maker also lists mastering as a use. With stereo processing and 64-bit double precision, it may be worth trying for light overall balance adjustments.
Who it may suit
- People who want to try passive-style EQs for free
- Mixers who want an analog-flavored EQ
- Users who want to manage CPU load
- Those who like saving and reusing presets
Good to know before you buy
- The maker accepts donations, but use is free.
- Oversampling adds processing, so CPU load may rise.
- The official site shows no dedicated PTEq-X product page or manual, and no system requirement figures. Testing in your own DAW after downloading is the safest check.
- The download is a zip file, so you unpack it and place the format you need (VST, VST3 or AU) where your DAW scans for plug-ins.
Price
Free to use (Ignite Amps official site, checked 2026-10-27).
See PTEq-X on the product page
Sources: igniteamps.com (checked 2026-10-27)
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