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$ 911 .00
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Maag Audio EQ4 500 Series 6-Band EQ

Six-band 500 Series equalizer module with Maag's legendary AIR BAND shelving EQ

MFR# EQ4-500

Product Description

The Maag Audio EQ4-500 is a single channel 6-band equalizer 500 Series module that fits into a single slot of the popular API 500 Series format module racks. Like the EQ2, many features and the design philosophies of the Maag Audio EQ4M standalone equalizer are incorporated into the EQ4-500 equalizer.

Like the 1U standalone EQ4M stereo mastering equalizer, the EQ4-500 has six EQ band sections divided into four, fixed frequency bell-shaped peaking equalizer sections, a 2.5 kHz shelving equalizer section, and the AIR BAND shelf equalizer with a choice of: off, 2.5, 5, 10, 15, 20, and 40 kHz frequencies. The five frequency bands in the main section are: sub or 10 Hz, 40 Hz, 160 Hz, 650 Hz, and the 2.5 kHz shelf EQ. The AIR GAIN allows for up to +20 dB boost for the AIR BAND shelving equalizer.

The five EQs in the main section have a boost/cut range of +15 dB and -4.5 dB with center position detent at 0 dB. The EQ4-500 has both a green signal present led at -20 dBu and a red peak led that flashes with +23 dBu peaks. There is also an in/out bypass switch for the entire module.


  • Single-slot mono 6-band 500 Series equalizer
  • Includes Maag's legendary AIR BAND shelving EQ
  • Highly linear phase operation maintains sound with minimal phase shifting
  • Detented controls for simple recallability

Product Specifications

Condition New
Tube or Solid State Solid State
Channels Single-Channel
Chassis Module
Module Type 500 Series
Module Slot Count 1 Slot
Digital I/O No

Product Reviews

5 out of 5 stars.
Review Count (8)

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I have tried a good amount of high end EQs (DW Fearn, Cranesong) so I wasn't exactly expecting anything special from the EQ4. Boy was I wrong, I have had it for about a year and I know I can't be without it. Air Brand is fantastic on vocals recorded on darker mics, it gives it a touch of polish that is tricky to get with plugins. It makes ribbon mics sound open and airy in such a musical way. I also own the UAD plug-in version, which by the way is fantastic but doesn't sound as effortless as the hardware. It's definitely a great investment for professional engineers.

By Marvellous N on September 30, 2023

Love the Maag on vocals especially. The hardware is night and day from the software plug ins and so much better. Controls are stepped so recall is very easy. Love it so much I got a second one!

By Todd U on March 13, 2023

So far, this is as great as expected. Sounds great in my vocal chain! The air is everything I expected.

By John D on February 12, 2022

Kept reaching for the plugin on tracks, stems, and masters... Then wised up and bought the real thing!

Couldn't be happier with the results and a huge shoutout to Vintage King for making this purchase possible. :-)

By Roy G on April 22, 2021

The one device in life besides Burl converters you cannot live without.

By Josh D on August 12, 2019

Two words...Air band

By Diego I on June 20, 2019

Very musical and useful EQ.

By Travis T on January 7, 2019

MAAG is known pretty much worldwide for their famous air band. Why? Because you keep turning it up more and more and it just keeps sounding better. I use it on every vocal and will usually print through it so that I can use it again on guitars or keys in the mix. Saving up to buy a few more channels!

By Brian T on May 4, 2017

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The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
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