MartinLogan ARC Calibration Microphone Kit

Whatever the quality of a subwoofer or active speaker, the bass range remains the most sensitive frequency band to a room’s acoustic characteristics. Resonance modes, standing waves, unwanted reflections: these phenomena can turn well-defined bass into an indistinct mush or, conversely, create gaping holes in the frequency response. The ARC calibration kit from MartinLogan offers a measurable solution to this problem, thanks to a long-standing technology partnership with Anthem Electronics.

The ARC Genesis system at your fingertips

The kit is based on Anthem Room Correction technology, whose third generation, called ARC Genesis, is the culmination of several years of development. This acoustic correction system does more than simply flatten the frequency response: it finely analyzes the subwoofer’s behavior in the room, identifies the positive contributions of the space (such as the natural bass reinforcement provided by the walls), and intervenes only on actual anomalies.

The ARC Genesis software, free and available for Windows and macOS, offers two operating modes. The automatic mode guides the user step by step, while the professional mode gives access to advanced settings: customizable target curves, adjustment of filter slopes, room gain control, boosting of extreme lows or highs. The interface displays detailed graphs showing the raw measurement, the target curve, and the result after correction, allowing you to understand precisely what the system is changing.

Measurement protocol and implementation

The calibration procedure is carried out by simultaneously connecting the microphone and the subwoofer (or active speaker) to a computer via USB. The software then asks you to place the microphone in at least five positions (up to ten for large rooms). The first position, at ear height at the main listening point, remains the most critical. The following positions must be placed 60 to 90 cm away at most from this central point, with a slight variation in height to give ARC a three-dimensional view of the acoustics.

During the measurements, the system emits frequency sweep signals. The room must be kept silent, because while ARC filters continuous background noise (ventilation, refrigerator), impulsive sounds cause an error that requires the measurement to be repeated. Once the analysis is complete, the correction curves are calculated and then transferred directly into the subwoofer’s or speaker’s memory. The profile remains stored in the device, independently of the computer.

Quick Measure function for acoustic placement

Even before launching a full calibration, the Quick Measure function turns the microphone into a real-time spectrum analyzer. This continuous measurement lets you instantly observe the impact of moving the subwoofer or changing a setting on the frequency response. You can capture “snapshots” to compare different positions and identify the optimal placement before proceeding with the final correction.

This pragmatic approach is a reminder that digital correction does not replace thoughtful placement: it comes into play after optimizing the subwoofer’s physical position. Poorly positioned bass from the outset will give a less satisfying result, even with correction applied.

Compatibility with the MartinLogan and Paradigm ecosystem

The microphone works with all MartinLogan and Paradigm products equipped with an ARC or PBK (Perfect Bass Kit) interface. On the MartinLogan subwoofer side, this includes the Dynamo series (600X, 800X, 1100X, 1600X, as well as the Dynamo 10 and 12), the Abyss 8 and 10, and the BalancedForce 210 and 212. Paradigm Defiance subwoofers V10 and V12, as well as the MilleniaSub, are also supported.

Beyond subwoofers, the kit can be used with active speakers from MartinLogan that feature an amplified bass section and an integrated DSP. ARC and PBK (Perfect Bass Kit) microphones are interchangeable: a microphone from a PBK kit will work with the ARC Genesis software, and vice versa. This interoperability extends to the microphones supplied with Anthem AV receivers, which simplifies management for users equipped with multiple compatible devices.

Kit contents and connectivity

The kit includes the measurement microphone itself, a USB-A to mini-USB cable to connect the microphone to the computer, and a mini-jack to mini-jack cable. The microphone uses a USB connection for transmitting measurement data. Note: Dynamo 10, Dynamo 12, Abyss 8, and Abyss 10 subwoofers use USB-C ports, which may require an adapter or suitable cable depending on the ports available on the computer. The kit does not include a microphone stand; you will need to provide a suitable tripod or hold the microphone by hand during measurements.

Technical specifications

Design and compatibility

• Calibration microphone designed for Martin Logan speakers with active bass and subwoofers
• Compatible with Anthem Room Correction (ARC) system

Supplied accessories

• Calibration microphone
• Mini-jack to mini-jack cable
• USB-A to micro USB cable

System operation

• Room measurement: the ARC microphone analyzes the actual frequency response of your speakers or subwoofers, taking into account the listening position and unwanted resonances
• Digital correction: the ARC software applies a custom correction curve that preserves the tonal balance of your speakers while optimizing the low end of the spectrum
• Easy application: transfer the correction profile to your speakers via USB
  • Automatic application or manual adjustment for a perfect result

Advantages and benefits

• Corrects the negative effects of the room on bass
• Preserves the original tonal character of the speakers
• Precise and personalized acoustic calibration thanks to the ARC system
• Cleaner, tighter bass that integrates better into the room
• Improves clarity, dynamics, and transparency, even in challenging rooms
• Immediate result: greater coherence, precision, and control