I have installed two of these out of the ten ordered. They are working great right now. But I inspected the construction using optical scope here at work and found the inner contacts are just bare copper not gold plated like the part you can see. These surfaces WILL tarnish and cause intermittent connection problems. Keep DEOXIT or other contact cleaner at hand.
These adaptors are so very handy when needing to split stereo signal for any application. I like to keep a few at the ready for my studio - I never know when I ma going to need one. They do not add noise to the processing path and I can hear no reduction in quality or volume.
PROS: small, convenient, low noise, well made, well priced
The 7221 connects the TRS tip to BOTH TS tips. There is NO connection to the TRS ring. Just so you know. But the connections to the inserted TS plugs in the adapter I received were so loose as to make the adapter worthless regardless of how it was wired.