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What is ARC®?

Simply put, Anthem Room Correction (ARC®) technology instantly adjusts the audio performance of your equipment to suit your room's unique characteristics. It 'tames' the resonances produced by reflective surfaces and other everyday obstacles, which can have negative effects on the sound radiating from your loudspeakers, especially the low frequencies. Removing the effects of these obstacles allows your audio equipment to achieve a more natural sound; to perform as close to the lab standard as possible.

On a more complex level, ARC is a proprietary digital signal processing software that works with a specially-engineered calibration microphone and your PC or iOS device* to quickly and easily optimize audio for your unique listening space. Anthem engineers developed the ARC system while researching how to replicate the audio-lab standard of performance in non-lab environments. This groundbreaking research was conducted in conjunction with the National Research Council of Canada, the Canadian government’s research and technology organization.

Anthem engineers realized that real world listening experiences had little in common with the controlled environment of the audio lab. That’s because the same loudspeakers sound different in different rooms. Performance is affected by a room’s unique characteristics and appointments; the size and shape of the room, its construction and furnishings. These obstacles cause standing waves, resonances, and reflections that can color the sound you hear. Imagine the sound waves coming from your speakers as ripples on a water surface. That makes it easy for you to understand how the ripples of sound bounce off any obstruction they encounter. You can immediately see the benefit of removing the obstacles.

ARC digitally compares a room’s acoustic signature to that of the lab standard. It measures the response of each speaker relative to the listening area. Then it uses advanced algorithms to eliminate the negative effects of the obstacles in the room, adjusting response and correcting phase effects. When ARC removes the obstacles, what’s left is the lab standard performance.

ARC also detects how much the room reinforces low frequencies due to its boundaries and pressurization. It automatically enforces optimal room gain, keeping bass response from sounding thin. ARC senses where each speaker’s low-frequency response declines and sets high-pass filters accordingly, ensuring natural-sounding levels of deep, well-blended bass.

ARC does all this, and more, instantly and automatically. The result is a replication of the lab standard right in your room, for "perfect" speaker performance in any listening space.

How-To: Running Anthem Room Correction (ARC) Setup Tutorial

How-To: Running Anthem Room Correction (ARC) Setup Tutorial


The ARC Kit is easy to use, and just a few simple steps can customize your loudspeakers for your unique listening space.

Each ARC-ready component comes with an ARC Kit, consisting of a Calibrated Microphone, a professional-quality mic stand, and high quality cabling. You will need a laptop running Windows 7 or later, and the latest ARC software downloaded from our web site.

Plug the kit’s custom Calibration Microphone into your computer and into your ARC-ready Anthem receiver, amp, pre-amp or your ARC-ready Paradigm speaker. Place the microphone at each of the listening positions in your room (a minimum of five, maximum of ten), and allow ARC to take a sound sample from each location.

The proprietary ARC software measures the difference between the speaker’s ideal lab-standard response, and their real-world performance in your room. Then, its sophisticated DSL accurately equalizes intricate crossover curves so that the performance of the speakers in your room meets the ideal lab standard!

Now you’re hearing exactly what our audio engineers intended you to hear: Pure, natural, transparent sound, no matter what challenges your room presents!

ARC Mobile Makes It Even Easier

ARC Mobile allows you to optimize your ARC enabled speakers by using either the internal microphone of the iOS or Android device (for basic room correction) or an optional calibrated microphone*. Optional calibrated microphones, which connect via headphone jack, will be included with select products from Anthem, Paradigm, and MartinLogan. Please refer to the product user manual to see if it’s included.

The ARC Mobile app is available for free to iOS users on the Apple Store and Android users on the Google Play Store.

To download the ARC Mobile app for iOS, visit the Apple App Store here.

To download the ARC Mobile app for Android*, visit the Google Play Store here.

* Please note that Android phones require an USB OTG adapter to use the optional calibrated microphone, and many Android phones already come with these adapters.

ARC does all this, and more, instantly and automatically. The result is a replication of the lab standard right in your room, for "perfect" speaker performance in any listening space.

ARC Genesis for Mac and PC

Click here for more details on ARC Genesis.

While ARC Mobile for iOS and Android provides astonishing improvements to your in-room response, for the ultimate level or room correction, consider using a Mac or Windows PC and an ARC or PBK Kit microphone (sold separately). ARC Genesis uses the same algorithms as the mobile app to calculate correction curves, but allow more control over room correction settings. ARC and PBK Kit microphones, which are required for using the ARC Genesis software, are the highest quality microphones available for taking acoustic measurements. The microphone in the Paradigm PBK Kit, available from Paradigm dealers, is compatible with all Paradigm products featuring ARC or PBK room correction technology.

Use ARC with your Paradigm Premium Wireless Speakers

Paradigm engineers have designed and built wireless loudspeakers that perform as well as traditional wired speakers. One of the secrets to achieving that performance is the inclusion of the ARC.

Use ARC with your Paradigm Subwoofer

When you design a subwoofer that plays lower and louder than any other subwoofer, room correction becomes an integral part of your performance matrix. Eliminating room obstacles with ARC eliminates muddying reflections and standing waves, to reveal more natural, more realistic, deep bass; the kind of bass that makes feeling believing. Please note that previous versions are marketed as PBK: Perfect Bass Kit. ARC software is backwards compatible with all PBK kits.

Use ARC with your Paradigm Hybrid Speakers

Hybrid speakers from Paradigm have active bass sections. For total control into your room, ARC is included to correct low-frequency anomalies for perfect bass integration.