Filtek Mk3 by Antelope Audio three-band EQ plugin interface

Filtek Mk3: Three-Band EQ Plugin by Antelope Audio

Filtek Mk3 is a three-band equalizer plugin by Antelope Audio, modeled on a 1970s hardware EQ originally designed for broadcast studios. It offers 12 frequencies per band, stepped gain up to ±16dB and a parallel EQ signal path.

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01Overview

Filtek Mk3 is an EQ plugin from Antelope Audio in the Effects category. It models a hardware unit first built in the 1970s to meet the standards of the IRT (Institut für Rundfunk Technik) and first used in broadcast studios. The developer says the unit later spread into recording facilities around the world. The plugin covers corrective and creative work, from narrow cuts to broad tonal shaping, with a control set for each of its three bands.

Best for

Corrective EQ
Parallel EQ processing
Mix bus tonal shaping
Vocal and instrument tone shaping
Low-end and high-end filtering

Developer: Antelope Audio
Category: EQ
Store: Plugin Boutique

02Key features

What you get

Three-band equalizer with modeled transformer-based I/O
Parallel EQ by mixing dry and processed signal
12 frequencies per band with stepped gain
Gain range of ±16dB per band
Three-way Q-switch for bandwidth selection
Mid-position Q-switch bypasses individual bands
Wide-ranging low- and high-pass filters
Module bypass switch and output peak meter

03In depth

Sound and Control Layout

Each of the three bands offers 12 frequencies and stepped gain of up to ±16dB of boost or cut. A three-way Q-switch sets the bandwidth. In the mid position, the Q-switch bypasses that band, so you can audition the EQ without removing settings.

Wide-ranging low- and high-pass filters let you clear rumble or air-band noise. A bypass switch for the whole module and an output peak meter help you compare the processed signal with the source and keep levels in check.

The developer says the transformer-based I/O is authentically modeled and that the unit can enhance the high end without adding harshness.

Parallel EQ and Workflow

The signal path lets you mix the dry and processed signal, which enables parallel EQ. You can keep the character of the source while blending in a stronger boost or cut from any bell filter band.

This suits mix bus and group processing, where you want tonal shaping without fully replacing the original sound. Because each band is independent, you can build a corrective move on one band and a creative tone change on another within the same instance.

04Specs

Will it run?

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

Developer	Antelope Audio
Type	Plugin
Category	EQ
Operating systems	Windows, macOS

05FAQ

Questions, answered

What is Filtek Mk3?

Filtek Mk3 is a three-band EQ plugin by Antelope Audio. It models a 1970s hardware EQ and offers 12 frequencies per band, stepped gain up to ±16dB and a parallel EQ signal path.

Which operating systems does Filtek Mk3 support?

Filtek Mk3 runs on Windows and macOS. The native plugin works on a Mac or PC without additional hardware.

What is the difference between the native plugin and Synergy Core Real-Time?

The native plugin runs on your Mac or PC without extra hardware. The Synergy Core Real-Time version runs with no perceptible latency on compatible Synergy Core devices.

What is parallel EQ in Filtek Mk3?

Parallel EQ lets you mix the dry signal with the processed signal, so you can blend in a boost or cut from each bell filter band while keeping the original sound.