Amazon.com: 3.5mm Stereo (F) to 6.3mm Stereo (M) Audio Jack Adapter : Electronics
3.5mm Plug to 6.35mm Socket (Pack of 2) 1/8 to 1/4 inch Stereo Audio Jack Adapter | Connects Devices with 3.5mm Port to Your Amplifiers, Guitar, Piano, Speakers & Mic That use
Jack adapter for musical instruments and microphone | Ekon