I bought this to replace a 20 year old amp that had served me well. I can tell they are genuine, they fit perfectly on my HD 140. I was trying to watch a simple 2 minute video at work. Lo primero lo compré a 54,99?. but after awhile I got lazy and stopped. The colors, when the headset is plugged in, are vibrant and produces great atmosphere. insomma il risultato è che continuano a scivolare. The product as is is not very good - especially for Thule. I purchased these due to them being JBL and generally my JBL products haven been great quality. The sound is clear.