Pairing 2 stereo paired homepods, does one set of paired speakers take on the high frequency values and the other pair take on the lower when playing?

[Geldesigner]

Hi all, Iv recently put two more Homepods in my front room, set up as 2 stereo pairs calling them front set in front of my chair and back set, behind, so two pods left and two pods right. When iv been playing music selecting both sets of pods to play the same song in the home app so they appear as a grouped set, I appear to be getting a more base sound out of the back pods and more high frequency treble out of the front pair of pods. Is anyone aware of any unknown software trickery apple may have built into the pod software which would separate out these frequencies if you were lucky enough to have 4 pods set up in the same room so giving a more immersive distinct stereo separation?
If this isnt the case then there's something odd going on with my pods.

 

[velocityg4]

Have someone help you setup a test.

- Label the sets on their bottoms A and B.
- They go in the room and randomly set A and B in the front and rear. Noting which is which on their own chart with test number. Without out you knowing which set is where. So, they could leave them in place or move them between tests. They just need to leave right and left in the correct right-left orientation.
- You go in and listen to music. Deciding if the low frequencies are front or rear. Noting it on your test number chart.
- If you consistently follow the positions of A and B. There is a difference (although this might just be a variation from manufacturing or acoustics from the placement). If you randomly get it right and wrong. It's just in your head.

Use the same song for each test.

 

[dotme]

Assuming you have the OG (2018) HomePods, there is some trickery:

HomePod uses spatial awareness to intelligently detect the room around itself, automatically adjusting and balancing audio to take full advantage of its environment to fill a room with sound regardless of where it's placed, and this was independently tested and confirmed to be true. According to Apple, HomePod also uses an advanced algorithm to continually analyze what's playing, dynamically tuning low frequencies for smooth sound.

Source: https://www.macrumors.com/roundup/homepod/

So you might be experiencing the HomePods reacting to each other, and the space around them, each adjusting their own output including low frequency tuning.