Overview

The Dayton Audio UMM-6 is a USB-connected measurement microphone released in 2013. It features a 6mm precision electret condenser capsule and is positioned as an individually calibrated product with an 18-20,000Hz frequency range. Marketed for compatibility with measurement software like Room EQ Wizard, it targets home theater enthusiasts and acoustic measurement beginners. Priced at 69 USD (Parts Express), it represents an entry-level measurement microphone.

Scientific Validity

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The UMM-6’s measurement performance remains at entry level. While specifications of maximum SPL 127dB (1% THD) and S/N ratio 70dB (A-weighted) meet basic measurement requirements, the noise floor of approximately 50-52dBA is high and affects measurement accuracy. This noise floor particularly reduces measurement reliability in quiet environments and detection of minute distortion components. The frequency range of 18Hz-20kHz is also limited by modern measurement standards, especially constraining low-frequency measurements. Although it fulfills basic functions as a measurement microphone, its performance is insufficient for precision measurements.

Technology Level

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The UMM-6’s technical implementation remains at 2013-level standard design. The 6mm electret condenser capsule configuration lacks innovation, and its implementation as a USB Audio Class 1 device is basic. While individual calibration is commendable, details about calibration file accuracy and measurement standards are unclear. Compared to contemporary competing products, no technical advantages are evident; rather, deficiencies in basic performance such as high noise floor are prominent.

Cost-Performance

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The UMM-6 is priced at 69 USD, but the more affordable Sonarworks Calibrated Measurement Microphone is available for 49 USD (direct sales). The Sonarworks microphone boasts a superior claimed frequency response of ±0.9dB from 20Hz-20kHz compared to the UMM-6, and also offers equivalent features like individual calibration files and USB connectivity. This means it delivers superior value at a lower price.

The calculation is: 49 USD ÷ 69 USD ≒ 0.71, which rounds to 0.7. Since a better-performing alternative is available for less money, the cost-performance is limited.

Reliability & Support

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While Dayton Audio maintains a distribution network as a house brand of Parts Express USA, support structure for measurement equipment is limited. Calibration files are downloadable from the website by entering serial numbers, but information about file update frequency and accuracy verification is insufficient. Repair systems and technical support for equipment failures do not reach professional levels expected for measurement instruments. No continuous improvements such as firmware updates are observed.

Rationality of Design Philosophy

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While the UMM-6’s design concept is rational as measurement equipment, implementation priorities are problematic. Noise floor reduction, most critical for measurement microphones, is insufficiently achieved, with 50-52dBA values inadequate for modern measurement requirements. The limited frequency range of 18Hz-20kHz and insufficient improvement in basic performance before product release are irrational. Considering the existence of products achieving superior performance at similar price points, questions remain about the direction of technical investment.

Advice

For those seeking a measurement microphone, we strongly recommend the Sonarworks Calibrated Measurement Microphone (49 USD) over the UMM-6. Despite its lower price, the Sonarworks microphone provides superior frequency response (±0.9dB), individual calibration files, and USB connectivity convenience, offering superior value in all aspects compared to the UMM-6. For higher precision requirements, the miniDSP UMIK-1 (approximately 100 USD) is also worth considering. Particularly for those requiring precise measurements or planning more advanced measurements in the future, these alternatives will provide higher long-term satisfaction. Currently, there are no compelling reasons to choose the UMM-6 other than inventory availability. If measurement reliability and accuracy are priorities, the rational choice is to select other products that offer significantly superior performance for a marginal price difference.

(2025.7.19)