Amazon.com: AKG Pro Audio C411 PP High-Performance Miniature Condenser Vibration Pickup for Stringed Instruments with MPAV Standard XLR Connector Black : Musical Instruments
AKG C411 pp Violin pick up , Best pickup - YouTube
AKG C 411 PP – Thomann United States
Schertler Basik pickup | Reverb
Amazon.com: AKG Pro Audio C411 PP High-Performance Miniature Condenser Vibration Pickup for Stringed Instruments with MPAV Standard XLR Connector Black : Musical Instruments
Move over Piezzo, Contact Mics are here (and they're better - Recorded Sample) | Page 3 | TalkBass.com