These little things are cool tech. However, they should not be expected to replace a traditional speaker setup. I was led to believe these would produce good sound at a modest price. After trying them out I was very disappointed. I tried with foam boards and ceiling tile. Both resulted in very muddy bass and no midrange. Very poor audio quality.

I installed it inside an Acoustic guitar to amplify it and use the back as a speaker. Works well and the adhesive is strong

I will just say that I have owned many speakers over the years. Ranging from JBL Studio Drivers to Bose 901's....to Cerwin Vegas...to Klipsch, Polk....etc, etc. (For anybody wondering....yes, I am that old)When I saw the Youtube videos online, I had to try it. I had to see it work at all.Maybe I had been conditioned by my many years of speakers.....but to get any sound at all sounded a little far-fetched. I wondered if building speakers with these was akin to building that radio using one of these kits that kids can do. OK, you got some radio. Not ready to replace my home system with it though.And to get good sound? Voodoo.....Sorcery...I am here to tell you....it works. I used two of these with 1 thick foam board 2frx2ft.And the quality of the sound? OMG!!!!! This has left me re-thinking everything that I thought I knew in over 40 years of playing with speakers. Now to be fair, you can expect a pretty steep drop-off at approx the 200Hz range. There is no base...at all. But after building these speakers..(And a child can do it, in fact, I had my 10y/o child help me as a project), I paired them with a cheap little amp that had Bluetooth and a sub out with power....... along with an old car sub that I had laying around.The sound is fantastic.It is a very natural sound...a little bright, but not overly emphasized at any level. The stage is fantastic. The separation is equally so. I prefer a little warmer but it was easy to adjust that.I am not prepared to say that these are the best speakers that I have ever heard. BUT HOLY CRAP!!!!To get better...you are going to have to really step up your game and be prepared to easily spend north of a $1,000.I wondered if it would be a good sound like a little Bluetooth speaker is a great sound. Tiny, not much to it. OH NO....this is room-filling sound. This has volume. These are VERY efficient.While you can tell a difference if you standing in front of them, vs off to the side, they are far better than many speakers and much less noticeable.I will caution you....if you make these and hang them, do not use metal on metal contacts anywhere in the mounting. I had metal hooks connected to metal cotter pins and I had terrible noise, to the point that I wondered if I blew something. As soon as tied fishing line to the cotter pins and removed the hooks, the noise totally went away.

I'm looking at buying a 3rd set. They do really well if you know how to use them

good quality. Not amazing on the low end, but good enough for the price. Used this with the 'best speakers in the world' idea from the dude on the youtubes.

I made a pair of flat panel speakers with these things. Turned out just like they should. Really powerful little noise makers. Delivery took some time though.

Used these to make worlds best and cheapest speaker. Stick these to the back of some sanded foam board, and you'll love it. I did.

Highs need to be adjusted down with EQ or add a woofer.

I followed the instructions in the online YouTube videos and built a set of 2x2 speakers using these drivers. I had a small amp that I used as I was using these for a PC sound system. With this the sound was bright but seemed to be weak on bass. I had a passive subwoofer so I added that but it was still weak on bass. I decided to replace the amp as I didn't really know the power output it had. This made a tremendous difference, the sound was then full bodied and crystal clear. I used an old receiver as the amp and it's set at a pretty low volume level. It became obvious that the small amp just didn't have any low frequency output to speak of.I am very happy with these speakers and would recommend them to anyone interested in building a pair. But make sure your amp is up to the task.

They work great!

That's exactly what I was looking for. Amazing quality, even bass! Just ensure the surface you are sticking it to is hollow.

SOUND WELL FOR MY CHAIR SND EXPERIENCE TO A REAL CAR ! I own a whole home car audio in my room and I have JL 12W1V2-4 in ported box and I couldn't pound my subs as much now because I moved to a town house of neighbors... BUT THIS DOES IT ! I CAN HEAR MY MUSIC SND FEEL THE BASS! WHAT A GREAT LITTLE TRANSDUCER ! ORDERED ANOTHER ONE ! PLEASE HAVE PUSH CONNECTORS! WOULD BE GREAT FOR SETUPS FOR EASY INSTALLATION!!!

The pegs to hook up your speaker wire are a little on the small side. But the function and sound are great!

Bought this and ran this on a 50w 4 ohm amp and it over heats like CRAZY. Got a different pair of exciters for what I need.