Alexander Dynaflanger Model 213Maker: Alexander Model: Dynaflanger Condition: New Description: Equal parts science fiction and science fact, the Dynaflanger Model 213 embodies the heart of flange. Ever since intrepid 60s era studio pioneers began manually applying pressure to their tape reels, the jet plane sound of the flanger has been an iconic part of our tonal toolkit. This is uniquely true for us here at Alexander Pedals, as our roots are firmly planted in flanging concepts.