2-Pt. Acoustical Calibrator - Class 2

Marsoni

M251S

$187.00

Get it in 3 business days with 1 day shipping. Friday, May 29

2-Pt. Acoustical Calibrator - Class 2For calibration of all Sper Scientific digital sound meters or any sound level meter with 1 or microphone. Conforms to ANSI S1. 40 1984 and IEC942 1988 Class 2 standards for acoustical calibrators. Simply place the calibrator on to the digital sound meters microphone, turn on the calibrator, and adjust the decibel meters reading to either 94 or 114 dB. Operates at a frequency of 1KHz 4% and with an accuracy of 0. 5 dB. Built in battery check. Easily

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We offer a 30-day return/exchange service after receiving.
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This product is AWESOME!! to be sure. The 3 sizes you will come to appreciate, as I did. They have some 'heft' to them, and the ribbed rollers are far superior to the flat rollers. I just finished installing sound/thermal mats 'under' the rear speaker shelf of my '71 spiffy GTO. Tomorrow, I expect to do under the rear seat, and I am sure happy that I have three different size quality rollers. Buy these, you can't go wrong.

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Reviewed in the United States on November 10, 2025

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TDroyle

Alexandria, US

★★★★★ 5

High quality tools

Size: 3 Pack

These are real nice. Pretty heavy and work well. Not some light weight junk tool. I’d definitely recommend these for ….. well I was sound deadening my car, but yes these were worth the money and will last me years if I ever have to get another set.

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Reviewed in the United States on January 6, 2026

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Rob Allan

Whiting, US

★★★★★ 4

Good but maybe too narrow...

Size: 1 Pack

Buy a wider one. Functions ns well.

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Reviewed in the United States on January 5, 2026

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