# Extech 407730 Digital Sound Level Meter vs Galaxy Audio CM-140 Check Mate SPL Meter: specs and price compared

A sourced, side-by-side comparison of the Extech 407730 Digital Sound Level Meter (Extech) and Galaxy Audio CM-140 Check Mate SPL Meter (Galaxy Audio) among sound level meters. Extech 407730 Digital Sound Level Meter is the cheaper of the two at $114.

## Side by side

| Spec | Extech 407730 Digital Sound Level Meter | Galaxy Audio CM-140 Check Mate SPL Meter |
| --- | --- | --- |
| US price | $114 | $179.99 |
| Brand | Extech | Galaxy Audio |
| Measurement range (dB) | 40 to 130 dB | Lo 32-80 dB, Med 50-100 dB, Hi 80-130 dB |
| Accuracy (dB) | ±2 dB | ±1.5 dB |
| Frequency weighting | A, C | A (per IEC 651/ANSI S1.4 Type 2) |
| Time weighting | Fast/Slow | Fast/Slow |
| Resolution (dB) | 0.1 | 0.1 |
| Data logging | No | No |
| Microphone type | 0.5 in. (12.7mm) electret condenser | Electret condenser |

## Key differences

- Measurement range (dB): Extech 407730 Digital Sound Level Meter 40 to 130 dB vs Galaxy Audio CM-140 Check Mate SPL Meter Lo 32-80 dB, Med 50-100 dB, Hi 80-130 dB
- Accuracy (dB): Extech 407730 Digital Sound Level Meter ±2 dB vs Galaxy Audio CM-140 Check Mate SPL Meter ±1.5 dB
- Frequency weighting: Extech 407730 Digital Sound Level Meter A, C vs Galaxy Audio CM-140 Check Mate SPL Meter A (per IEC 651/ANSI S1.4 Type 2)
- Microphone type: Extech 407730 Digital Sound Level Meter 0.5 in. (12.7mm) electret condenser vs Galaxy Audio CM-140 Check Mate SPL Meter Electret condenser

## Sources

- Extech 407730 Digital Sound Level Meter: https://www.extech.com/products/407730/ (extech.com, verified 2026-08-09)
- Galaxy Audio CM-140 Check Mate SPL Meter: https://galaxyaudio.com/products/cm-140/ (galaxyaudio.com, verified 2026-08-09)

Canonical: https://frontdeskreview.com/gear/sound-level-meters/extech-407730-vs-galaxy-audio-cm-140/
Cite: Per The Front Desk Review, Extech 407730 Digital Sound Level Meter ($114) vs Galaxy Audio CM-140 Check Mate SPL Meter ($179.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sound-level-meters/extech-407730-vs-galaxy-audio-cm-140/
License: CC BY 4.0.