Good product. But will not work with all controllers
The Quadra Thru, by MIDI solutions, is a well-made, quality device that is not made in China. However, before purchasing this product, you should be aware that it may not work at all for your application depending on the device you will be using as a controller and going into the "In" port. This device is not powered; it does not even have a jack to add a power adapter. In theory, and in practice, it receives power from the device which is going into its "In" port. However, not all MIDI devices send power. There are many MIDI devices that will send MIDI data but not an extra stream of DC voltage (that the Quadra Thru would require). On the manufacturer's website, there is a list of devices (some are actually quite popular) that will not supply power to this product. I purchased the Quadra Thru, and in my case my controlling keyboard does not supply power. I didn't know that, so I am unable to use the product as I intended. I contacted the company and a representative answered me and gave me a workaround (which is to connect my controlling keyboard first to another keyboard and then the "Thru" port of that keyboard to the "In" port of the Quadra Thru) which worked, but is not what I had intended. He also noted that he had added my device to the list of unsupported devices on their website. Again, this is a quality device, feels very sturdy and well-constructed, but be aware of the power issue noted here.