The Dunn Effects Pvrifier is a lo-fi analog filter overdrive pedal, a take on the circuit of the Ibanez LF7, a lo-fi analog filter overdrive pedal that has found a niche of fans among stompbox collectors. It combines hi- and lo-pass filters with an overdrive stage, producing what Delicious Audio's Paolo De Gregorio describes as "a range of dirty/saturated tones from telephone-style grittiness to smooth overdrive and crunchy chords"1. For players interested in the wider category, see Filter Pedals and Overdrive Pedals.
The controls: filters, overdrive and Mix
The pedal's signal path runs through Hi- and Lo-pass filters followed by an overdrive, with a Mix knob to blend the effect. The filters shape which frequencies get through, which is where the lo-fi character comes from, and the overdrive adds the saturation on top1.
The Mix knob is the control that makes the circuit practical on a live board. As Delicious Audio puts it: "The ever-useful Mix knob allows you to reintroduce some of the clean signal to add definition and dynamics"1. Blending clean signal back in restores attack and clarity that heavy filtering can strip away, similar in principle to the parallel blend found on other drive pedals.
Versions and availability
A V2 version of the Pvrifier features the same circuits as the original in a smaller, compact case1. The pedal has top-loaded inputs, so the jacks sit on the edge facing the player rather than the sides, which can save room on a tight pedalboard1.
Dunn Effects builds the Pvrifier in small numbers. Delivery within the US may take up to 6 to 8 weeks1.
Warranty
For pedals damaged in transit, Dunn Effects will repair or replace the unit at no cost if repairable, or replace it once the damaged unit has been returned1.
Videos
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Questions
Is the Pvrifier true bypass?
Yes. The Pvrifier uses true bypass wiring, so when the pedal is off, your guitar's signal passes through without the filters or overdrive circuit loading it. That matters on a pedalboard where several effects sit in front of the amp, since pedals without true bypass can dull the signal over long cable runs.
What power supply does the Pvrifier use?
The Pvrifier takes a standard 2.1mm 9V DC power jack with a negative center pin, the same connector used by most compact pedals. Use a regulated 9V DC supply with that polarity, and check that your daisy-chain supply has enough current headroom for the rest of the board.
What does the Mix knob do on the Pvrifier?
The Mix knob lets you reintroduce some of the clean signal alongside the filtered, overdriven signal. Delicious Audio describes it as a way to add definition and dynamics, which helps when the filters and drive have thinned the tone out. It works like a parallel blend on many overdrive pedals.
Where is the Pvrifier made?
Dunn Effects assembles the Pvrifier by hand in a workshop in Saint Louis, Missouri, in the United States. Because the pedals are built in small numbers, delivery within the US may take up to 6 to 8 weeks.
Sources (1)
- Pedal Update: Dunn Effects Pvrifier V2 LoFi Filter Drive, Delicious Audio, 2022-08-29