...conditions and equipment, I am sharing a photo of my measurement environment.
I use a Larson Davis CAL250 SPL calibrator together with an Earthworks M30 microphone. On the measurement day (today, Friday, March 13, 2026), the lowest ambient noise floor at the measurement site was 22.1 dB(A)...
...exhibited a slight attenuation in the high frequencies, while their microphone showed a slight boost. Both microphones were within Earthworks' trusted tolerance range but were coincidentally skewed in opposite directions.
After compensating for the relative differences between the two...
I tested my new microphone holder today.
It was a 5ms window @ 1m measurement, and the results are astonishing.
No smoothing
1/12 octave smoothing
I compared the graphs of no smoothing vs 1/12 octave smoothing, and there’s ‘almost’ no visually detectable difference.
With this, I now...
...task.
So, I refined the pipe and successfully crafted an ultra-precise weapon that is only 3mm thicker in diameter than the Earthworks M30.
I filled the inside of the pipe with sound-absorbing material to eliminate unnecessary resonances, reinforced it structurally, and finished...
...the two speakers the owner brought in and measured it without resetting the GLM settings.
However, the response at that frequency was the same.
Can this really be explained as a coincidence due to product variation?
I use a different microphone than Amirm.
(Earthworks M30)
I'm using Klippel's dB-Lab software and DA2 hardware, and I'm also using REW with Earthworks' M30.
The speakers used for the measurements are Adam's A4Vs, which are capable of reproducing up to 48 kHz.
...measurements.
It is impossible to accurately check the performance limit of my SPL calibrator.
At least the relative comparison using the Earthworks M30 data sheet is as follows:
There is little difference between the official datasheet and the DIY measurement data.
Let's get down...
...no means a person who enjoys slandering anyone.
I think this is one of the possible misunderstandings in my current environment.
And Earthworks' measuring microphones are free-field microphones.
You should know that the measurement through Window gating is equivalent to Free-field...
Hi guys, I'm Earthworks M30 microphone user.
I have great faith in Earthworks, but I nevertheless wanted to test it at least once.
And that dream just became a reality today.
Audio lovers in Korea heard me, they sent me their Earthworks microphones without any hesitation.
And below is a...
This is a measurement and review of the Elax Monitor III MK2.
Here we go.
I measure and review speakers using DIY turntable, Earthworks M30 mic, and Klippel Distortion Analyzer 2.
First, the impedance response.
It was measured at 0.1V and 2.83V, respectively.
Next, SPL/FR and...
...sure of is that significant differences in sealing were observed in the same comparative environment without any changes in the internal sound absorbers (using Klippel and Earthworks).
This may not have been a leak of air, but an additional tremor caused by internal resonance.
And it's improved.
...to them.
I am an audiophile publishing speaker reviews to audio communities. Currently, I am using Klippel Distortion Analyzer 2, Earthworks M30 mic, and a DIYed turntable to measure directivity(quasi-anechoic measurement) and nonlinear distortion for my reviews.
I’ve...