I bought this for it's intended purpose. I have a Bose 300 Soundtouch that supports optical input. I have tried to send RCA from the master line of a Pioneer DJM mixer to no avail. To troubleshoot, I connected my cable box's optical output directly to the soundbar. Have clear sound. I then used the RCA cable receiver for this converter and the converter's optical output for the soundbar. No sound. I swapped out the RCA cables to make sure it wasn't a problem. No sound. I tried all the settings on my devices. No sound. Given that the 2 sources I tried and the speakers and cables/connections are fine, it's safe to assume this converter isn't working properly. I would like to try another one, but I will not repurchase this product. If the seller here wants to send me a replacement I'll be happy to try to update this review. The replacement works as advertised and I have upgraded my rating from 1 star to 4 stars. The device works as described and would give 5 stars if the original device worked. Thank you to the seller for the responsiveness and replacement. As long as you don't run out of time and the seller remains accessible, this isn't a bad buy. Thank you!
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