Thx Ultra Certified – What Does That Mean?

All Our 1723 Speakers Are Certified

All our 1723 speakers are Certified by the very strict testing protocols of THX Ultra

where each speaker must pass a set of 400 measurements. The THX Certification

does not mean it is a dedicated home speaker, but rather a guarantee of tight

consistency within well-established acoustic parameters. THX Certification is as

much about music, as for movies.


The engineers at THX Labs utilize a proprietary scientific testing methodology to

ensure the highest audio fidelity possible.


All 1723 speakers passed the THX Ultra Certification without any change to the

products, meaning our standards already exceed THX Ultra level out of the box!


Key tests in this program are as follows:


Axial frequency response

This describes a loudspeaker’s ability to reproduce

audio accurately. The test confirms if the axial

frequency response is balanced and flat within

tight tolerances.


Vertical and horizontal dispersion

Not everyone gets the middle seat when watching

a movie. THX measures the off-axis response to

confirm if it is smooth with no audible comb

filtering. A pass at THX Ultra ensures every seat

in the room is served just like the sweet spot.


Output versus distortion

This tests the speaker’s ability to reach the

SPLs necessary to achieve THX Reference.

Level within certified limits of distortion at the

listening distances required by THX Ultra