🔊 DIY Bass Speaker Kit: AIYIMA 4 Inch Loudspeaker with Vibrating Membrane - Passive Woofer Replacement Review

First, it is not 4 inch. Even the size they state on the pictures is wrong. Also, one of the parts I received sunk, so there's no way to do a two-way tour. Typical dropshipping bullshit.

I was actually going to give those 5 stars but one of mine was misassembled and quite off center. Definitely a disappointment and a potential point of failure, hope it lasts but time will tell.

Good build quality. Very compact, so ideal for small suitcases. I've used them to add bass to small 3" speaker desktop speakers and you can really hear the extra bass. The only problem is adding bulk for the adjustment as you have to glue it on making it harder to just screw it on.

Cool product for my homemade Bluetooth boombox. Since I used 6.5" subwoofers, I should have gone for the 6.5" subs, but couldn't find the "diaphragm" style. Otherwise I would have had to use a speaker with a cored voice coil and magnet, which would have made the ghetto blaster significantly heavier. When I sealed the box properly and added heatsinks, it was a definite improvement. The main thing is that the box is SEALED for work.