ATH Gen2
Variable-Throat Waveguide Kits

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Acoustic Measurements

The following are some assorted measurements, gathered during the development and testing of the waveguides.

Note 1: The absolute SPL levels are NOT directly comparable, the pressure scale is not calibrated, nor were the voltage levels always held the same across all the measurement sessions. All that these data provide are the shapes of the raw frequency responses of each individual driver tested with that particular waveguide.

Note 2: These are only quick informative measurements, typically sampled for off-axis angles roughly 0 - 30° / 10° step. The exact values of the angles may slightly differ between different sessions. It is not necessary to measure the whole radiation pattern each time, as the match between a BEM simulation and the actual measurements is in general very good (see e.g. this diyAudio post). The measurements have been all done indoors, gated with 4.5 - 5 ms time window.

Compression drivers tested:


1"
Peerless DFM-2535R00
Lavoce DF10.171K
RCF NDX595
Faital HF108
B&C DE360

1.4"
SB Acoustics ROSSO-65CDN-T
BMS 4554




Peerless DFM-2535R00
A520G2 / T520-25-STD-1


Peerless DFM-2535R00
A520G2 / T520-25-EXT-1



Lavoce DF10.171K
A520G2 / T520-25-STD-1


Lavoce DF10.171K
A520G2 / T520-25-STD-2


Lavoce DF10.171K
A520G2 / T520-DF10-171K (matched adapter)


Lavoce DF10.171K
A520G2 / T520-25-EXT-1



RCF NDX595
A520G2 / T520-25-STD-1


RCF NDX595
A520G2 / T520-25-EXT-1



Faital HF108
A520G2 / T520-25-STD-1


Faital HF108
A520G2 / T520-25-STD-2


Faital HF108
A520G2 / T520-25-EXT-1



B&C DE360
A520G2 / T520-25-STD-1



SB Acoustics ROSSO-65CDN-T
A520G2 / T520-ROSSO-STD



BMS 4554
A520G2 / T520-36-STD-1




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Marcel Batík, 2024