Fredman Technique 55° Double Shure SM57 Microphone/mic clip for studio recording | eBay
Guitar Gear Forum • View topic - Breaking down the Fredman mic'ing technique .
EMG Labs - Shure SM57 Unidyne III and regular SM57 using the Fredman Technique on a Blackstar Amplification HT-60 with a Wilkinson Audio mic clip - sounding damn good. | Facebook
Fredman SM57 Mic Clip | Soundcast Studios | Reverb
The Fredo Dual SM57 Fredman Style Mic Clip Halter Einstellbare Studio-Qualität : Amazon.de: Musikinstrumente & DJ-Equipment