Electronic Emporium - The #C411PP of AKG is a special contact microphone for acoustic string instruments with XLR connection. It adheres to the instrument near the bridge and as it is ultra-light
AKG C411 PP Contact Microphone Test in Hong Kong - YouTube
LOT OF 20)PHOENIX CONTACT - Connection terminal block - AKG 16 GNYE -16mm | eBay
AKG C411 III Contact Condenser Microphone Made In Austria w/ MPAIIIL Micro Mic Phantom XLR Adapter | Reverb
Akg c411iii Contact Condenser Mic on acoustic guitar - YouTube