In short, they are "piegadebutanpacherequinemarchepas".
So just looking, we see the sum of five piezzos. It has the look of one of its kind Eminence tweeter APT80 but one that is 3 piezzos Carrefour.
There is a kind of pseudo "medium" which is always a BUT piezzos a clubhouse.
And even a boomer ... to make more fire.
On the outside, it is composed of a grid that protects the woofer (the better, the tweeters will be soon removed), and if the grips by, carpet (probably for smoking) , a case in pellets of quality .... of shit ... roughly that of default.
The sound when it has, as one imagines is all loud and rough. As the speakers very low-end:
- The bass is shorter and can "powerful"
- The medium is rough
- The highs are loud and obviously it gives the impression of megaphone

Internally speaking, I think this forum does not contain a filter, for that matter what it was for? It burns out a filter? And for the 99-grand-Chinese-country-to-arrive slingshot installation anyway?

A detail to consider leaving, the logo on the speaker (photo so against) a strong air of being put with a picture processing software ... evidence of fabrication in large quantities (these are OEM versions) and the product is discoverable in another brand.

To quote the technical characteristics:
<p class="bbcode-cite"> Quote: <span>3-Way / 500 Watts, Boomer 38cm, 105dB, Full Grille</span>

Deja is a two-way speaker, because five is not a medium but tweeters and six tweeters. Then ... 500 watts. Well stop looking at me with big eyes is 175 watts rms a break everything (so the 500 watts are watts "peak"). 105 decibels of return? Vindjeuuuuuuu ... possible but the measure is carried out at what distance and what power?

Basically it would have without the mitonage AC: 6 piezo tweeters, 175 watts RMS, 93 dB 1W/1m.
But obviously it would sell the most didieu.

I strongly discourages this forum as all the speakers piezzos. Similarly for the brand Kool Sound Boost and co.
If the budjet is low and buying in Germany (online for example) do not mind:
- The Box PA502 (https://www.thomann.de/fr/the_box_pa502_fullrangesystem.htm)
- The Box PA302 (https://www.thomann.de/fr/the_box_pa302_fullrangesystem.htm)
- The Box PA202 (https://www.thomann.de/fr/the_box_pa202_fullrangesystem.htm)
- The Box PA202-15 (https://www.thomann.de/fr/the_box_pa202-15.htm)

There are very good speakers B. Cord (http://www.bcorde.com)
Otherwise the usual speakers advise on this forum, that is to say:
- Warfedale EVPX
- Peavey Messenger Pro
- Samson RS