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  • Overview
  • Features
  • Customer Reviews
  • 4.9/5

Regular Price: $299.00


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The world’s most accurate
emulations of API’s legendary EQs.

The API 500 Series EQ Plug-In Collection for UAD-2 hardware and Apollo interfaces faithfully captures the punch, low-frequency transparency, and ultra-tight imaging of API’s iconic 550A and 560 Series EQs.

With unique filter shapes, complex band interactions, and musical filter amp distortions, the 550A and 560 Series EQs left an indelible stamp on legendary recordings of the ’60s and ’70s. Painstakingly modeled on pristine early-’70s units provided by Ross Hogarth and Capitol Studios, the API® 500 Series EQ Collection gives you stunningly accurate, end-to-end modeling of these revered EQs.

Track and mix with full-circuit emulations of API’s iconic 550A and 560A EQs

Harness API’s musical filter amp distortions and musical clipping behaviors

Use API’s proprietary “Proportional Q” for more precise control over your sources

Mix with artist presets from Ross Hogarth (Van Halen, Mötley Crüe), Darrell Thorp (Beck, Radiohead), and Vance Powell (Jack White, Kings of Leon)

550A Parametric EQ

550A Parametric EQ

Introduced in 1971, the 550A was the standard channel EQ module on API's first consoles.Its three overlapping bands of parametric EQ, independent 50 Hz to 15 kHz band-pass filter, and individually selectable peaking or shelving modes make it the perfect tool for getting drums and guitars to stand out in the mix.

560 Graphic EQ

560 Graphic EQ

With ten bands of graphic EQ, the 560 EQ is ideal for shaping your mix with surgical precision. API’s proprietary “Proportional Q” intuitively widens bandwidth at lower boost/cut levels and narrows it at higher levels, giving you more musical control over precise bands of your mix.

Key Features

Superior, licensed plug-in emulations of the most enduring API 500 Series EQs
API 550A discrete, 3-band bell/shelf parametric equalizer
API 560 discrete, 10-band graphic equalizer
Models the entire electronic path, including custom API 2520 op-amps and transformers, band interactions, and internal clipped filter distortion
Licensed and endorsed by Automated Processes, Inc.
Includes presets from famed engineers and producers, including Vance Powell, Ross Hogarth, Carl Glanville, Jeff Juliano, Eli Janney, and Darrell Thorp

Customer Reviews

API 500 Series EQ Collection

Overall Rating


D. Kolody

May 14, 2024

Love me some API flavouring

Mmmmm API! *insert mic drop here*

B. Lehaney

May 11, 2024

Awesome sounding EQ

This EQ works on everything. UA has done an amazing job.

S. Lontano

May 8, 2024

The api sound on drums

The best eq on kick and snare

M. Schneider

April 29, 2024

Very intuitive

I have now completed the API products from UA, because the sound is very authentic, more than other emulations.

A. Lee

April 27, 2024

This is what API sounds like!

The vibe and sweetness are legendary. Essential for the tracking stage.

P. Bright

April 17, 2024

Sounds good but can't see it

I have a 4k monitor but this plugin is not resizable and thus to small to see it. This seems to be the normal for all Apollo plugins. 4k monitors or higher are now the norm for PC users and not making your plugins 4k resizable just makes them useless. Great sound but if your in 4k go to another company. It seems UAD has abandoned PC users anyway. Don't even get me started on Luna

R. Custodio

March 12, 2024


It brings life to any sound source just by turning it on. To understand it, test it on your master channel. The 560 makes me want to have a 2448 with 560s in every channel! I love the easy visual and the accuracy.

L. Kopanski

February 2, 2024

Exceptional emulation.

My mixes sounds like never before. This EQ really makes a different. Dont be scare to put it on the mix bus. It's opening the mix like nothing else.

c. rosario

February 1, 2024

EQ that pops

This EQ is amazing, the 550A simply pops out a vocal as soon as you apply a preset , that how good it is.
Can’t wait to see what’s next from UAD

r. kELLY

January 15, 2024

Lovely gate

the whole plugin rocks but really enjoy the gate with sampled drum loops and more. Seems very organic. Gr8 job on this one!

A. Viloria

January 11, 2024

API 500

Mis guitarras eléctricas tienen un EQ permanente y es este API, sonido increíble.

A. Santana

January 4, 2024


i like color

w. gause

December 14, 2023



F. Grüber

July 17, 2023

Amazing box of color!!!

It is not just a great EQ, it’s a beautiful box of character and color. Just try it without any eq moves and you’ll see how colorful it is, specially on the mix bus ✨

G. Merino

July 14, 2023

Great emulation. Missing de 550B version

Probably the best emulation of the 550A eq.
It would be perfect an update including the 550B (four bands) as other companies does

J. Mateo

June 28, 2023

An amazing classic

This is one of the most used plugin bundles in my collection hands down amazing

S. Rico Hernandez

June 28, 2023

Increíble herramienta

una joya más de universal audio. Los amo!!

j. Brantley

March 20, 2023

very strong product

As a studio owner and producer i have used the API EQ plugin's on my vocal chain that i create for myself and other artis. this is a very easy plugin's to work with hand's down


January 25, 2023

Great EQ

Already have the Waves version , this is slightly better but who wants to deal with Waves support.A great EQ, a small boost in any frequency adds a lot so good to get something to cut through the mix.

A. Thierry

January 14, 2023


This eq is just magic for kick bass and in fact for anything .. thanks for this