I have a pair of Sennheiser headphones that I use for DJing and listening to music on my laptop. It came with a removable adapter that I unscrew so that I could connect into the normal headphone jack on my laptop, then I just put it back on so the plug fits into my mixer. I lost the adapter and I'm not sure of the exact name of the piece. I'm sure it's something I can pick up at Sam Ash or Guitar Center, but what's it called so I know what to look for?