Heather Brown Electronicals The Volga Preamp Effect PedalThere's something about those Russian tube amps that just won't quit case in point: The Heather Brown Electronicals The Volga Preamp. Throwing it over to one of Mike Matthews's many beloved tube amps the Sovtek MIG 50, the Volga Preamp faithfully replicates its sound and response entirely through JFET emulation. The Volga Preamp is, like all other Heather Brown Electronicals creations, a labor of love. The pedal in question recreates the sound and