Which speaker configuration to choose?

Question

Audio

Hello. Question for audio engineers.
I design several products that have a body, one product is a monitor, with an aluminum body, the second is a unicycle, the body panels are made of carbon (or glass) plastic. Thinking about how to make sound.
In fact, the task is to make the sound "just be". But I want to get a good volume, and at the same time that the sound is "normal" (I understand that "good sound" in these conditions cannot be obtained, but as far as possible at least). In the monitor, I still want it to be stereo. Sound space is very limited.
What to choose as speakers?
Small broadband? Example: https://aliexpress.ru/item/32858660858.html In the amount of 4 pieces they will fit.
Resonant? https://aliexpress.4 will also fit, but I think that a couple of these should be enough. If you stick two resonators on one piece of aluminum (at a distance of 50 cm from each other), won't they interfere with each other?
Like these ones? https://aliexpress.ru/item/32793380754.html Only two will fit.
Or maybe there are other options.
And please explain your advice, why resonant, or why not, or why it is better with a passive cone, etc.
Anything bigger won't fit. There is no place to make a proper acoustic enclosure either. The cost is also important, the sound should fit in 30 dollars along with the amp. Well, a maximum of 40, if he is at the level of harman-kardon (a joke of humor).
You also need to understand that in the monitor the direction of the speakers will actually be towards the wall behind the monitor, I think it will not work through the screen, since the screens are standard, and most likely not suitable for clinging resonant speakers to them (or maybe even die from high-frequency vibrations). As for the unicycle, it is actually a "battery-powered bluetooth speaker".