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Dorrough 40-A2 Loudness Meter

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Page last updated Feb 13, 2026

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Designed for precision audio monitoring, the Dorrough 40-A2 Loudness Meter is an essential tool for studio engineers and sound professionals seeking accuracy in their audio levels. With its real-time, true-peak metering system, this device ensures that your audio stays within the optimal range, preventing distortion and maintaining clarity. The 40-A2 is known for its intuitive visual display, giving users an immediate overview of both peak and average loudness levels. This makes it a reliable companion for mixing, mastering, and broadcasting tasks.

The Dorrough 40-A2 sets itself apart with its dual-channel monitoring capability, allowing you to keep an eye on two separate audio sources simultaneously. This feature is particularly useful in complex studio environments where multiple inputs are managed. The LED indicators provide clear, precise feedback, making it easy to spot any deviations from the desired audio levels at a glance.

Integrating seamlessly with your existing setup, the Dorrough 40-A2 can be mounted into racks, ensuring it's always at hand without occupying valuable workspace. Its sturdy build is made to withstand the rigors of professional studio use, while its user-friendly controls make it accessible for both seasoned audio engineers and those new to the craft.

Key Features:

Real-time, true-peak metering system
Dual-channel monitoring capability
Intuitive visual display with LED indicators
Rack-mountable design for easy integration
User-friendly interface for quick adjustments
Suitable for mixing, mastering, and broadcasting applications

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BetaEngineer

Pioneer VSX-1018AH + JBL L100 + DVD Audio + Dorrough 40-A2

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Critic Reviews

Dorrough: 40 A2 meters | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production.

tapeop.com

The Dorrough 40-A2 Loudness Meter stands out with its dual metering capabilities, allowing engineers to monitor average and peak levels simultaneously—a feature not commonly found in modern gear. This unique functionality enhances the compression process, providing clear visual feedback during adjustments. While the price may deter budget-conscious home studio owners, its performance and versatility in both studio and broadcast settings justify the investment. However, the complexity of simultaneous readings might overwhelm some users. Overall, it’s a valuable tool for serious engineers, but less experienced users may find it daunting.

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