POYATU 40mm Headphone Sound Unit Speaker Hifi Sound Titanium Driver Speakers Copper Ring Deep Bass Sound DIY Repair Part

I usually by extra parts just in case they come defective, I didn't this time and regret it. One speaker works fine, the other dead out of the box. There is something wrong internally as it shows infinite resistance (open) with a multi-meter between the two solder pad leads. This seems to not be an isolated incident. Buy extra, or find a higher quality product.

order 2 set 4 pcs. but 3 units are defected, How poyatu control the quality ? No QC at all never check beforr ship , very disoppoint.

high defected rate, you will find good one only 50% or less.

One of the speakers in the set isn’t working. Money down the drain.

OK.

OK.