PastFX releases doppelflänger flanger/doubler pedal

September 25, 2026 · 2 sources

PastFX released the doppelflänger, a compact pedal based on the 1970s MXR Flanger/Doubler rack unit, Guitar Pedal X reported on September 25, 2026. The pedal is listed at $399 AUD, which the report gives as $280 USD¹.

The doppelflänger uses a Panasonic MN3007 bucket-brigade device for the flanger and an Xvive MN3005 for the doubler, standing in for the Reticon chips in the original rack unit¹. It requires a minimum of 18V and covers the 24V swing of the original, and it has a Vactrol onboard, visible when the back plate is removed¹. PastFX's Verlie calibrated the pedal's output against her own vintage rack unit, according to the report, which says the original's quirks are kept intact¹.

Controls are Width (depth/intensity), a Mode switch for Flanger or Doubler, Speed, Manual (delay time), Dry to Wet Mix, Regen (feedback), a Hi/Lo switch for instrument or line input, and a Phase Invert switch¹. The Hi/Lo switch is a push button on the front panel, and a single port changes between CV in and CV out via an internal slider switch¹.

The report compares the doppelflänger with MXR's own MXR Flanger/Doubler pedal, which launched on August 11, 2026 at $333 and runs on 9V, converting it internally to plus and minus 12V¹². Guitar World reported that the MXR unit is all-analog with the original control set, a doubler button, a mix knob and an Invert button that reverses the wet signal polarity². The Guitar Pedal X report says the MXR omits the Vactrol, replaced with a VCA filter, and uses a pair of 3204 chips for the flanger and a pair of 3205 chips for the doubler¹.

Guitar Pedal X's reviewer wrote that the flanger voicing "sounds fantastic" but preferred PastFX's 80/A and Reticon flangers, and said the doubler mode works well with higher gain pedals¹.