The Audiofab Frequency Distiller is a dual-channel filter pedal designed specifically for bass guitar, announced in June 2025. Each of its two independent channels carries a switchable high-pass, low-pass, band-pass, or notch filter, and a channel mode switch lets you run one filter or both in parallel. Audiofab describes it as inspired by the iconic Alembic Superfilter SF-2, bringing that filtering concept into a pedal format1. It sits in the filter family alongside other filter pedals, but with two channels and a clean blend aimed at bass players.
Controls and modes
Each channel's filter type is selectable among four shapes, and the mode switch determines how many channels are in play1:
| Control | What it does |
|---|---|
| Filter type selector (per channel) | Switches each channel between high-pass, low-pass, band-pass, or notch filtering1 |
| Channel mode switch | Engages one filter (A mode) or both filters in parallel (A+B mode)1 |
| Clean blend | Adjusts the level of unprocessed signal mixed with the filtered output, in both modes1 |
In A+B mode, running both filters in parallel opens up combinations such as a high-pass and a notch together, while the clean blend keeps your fundamental under the filtered signal in either mode1.
Sound and use
Audiofab pitches the pedal at a wide range of bass tones. Bass Magazine's coverage describes the range of uses: "Whether you're sculpting low-end dub tones, accentuating fingerstyle midrange, or creating deep prog rock textures"1. Although it is designed for bass, the same coverage calls it "Super-flexible tone shaping for bass or guitar"1, so guitar players can put it to work too.
The pedal runs on 9V external power but boosts it internally to 26V, which Audiofab says gives massive headroom1. Power it from a regulated 9V DC supply rather than sharing a daisy chain with high-draw digital pedals.
Price and availability
The Frequency Distiller was announced on 17 June 2025 at $499 CAD, approximately $370 USD, available directly from Audiofab's online store1.
Videos
Packy Lundholm and Audiofab, Inc.
Small Dog Studio
Questions
Is the Audiofab Frequency Distiller true bypass?
Yes. The Frequency Distiller uses relay-based true bypass, and the footswitch also carries a long-press mute function, so you can silence the output without changing your bypass state. The pedal sits in a rugged Hammond 1590BB aluminum enclosure and runs on 9V external power, which Audiofab boosts internally to 26V for headroom.
What filter types does the Frequency Distiller offer?
Each of the pedal's two independent channels includes a switchable filter with four types: high-pass, low-pass, band-pass, or notch. That gives you everything from cutting sub rumble with a high-pass to isolating a frequency band or carving a notch, with a clean blend control to mix unprocessed signal back in.
Can the Frequency Distiller run both filters at once?
Yes. A channel mode switch lets you engage either one filter (A mode) or both filters in parallel (A+B mode). In both modes, a clean blend control adjusts the level of unprocessed signal mixed with the filtered output.
What power does the Audiofab Frequency Distiller need?
The pedal runs on 9V external power, which is boosted internally to 26V, something Audiofab describes as giving massive headroom. Use a standard 9V DC supply; the internal boost is handled by the pedal itself.
Can I use the Frequency Distiller with guitar?
Yes. Although it is designed specifically for bass guitar, Audiofab describes it as super-flexible tone shaping for bass or guitar, so guitar players can use the same filtering and clean blend approach on their instrument.
What is the Frequency Distiller based on?
Audiofab describes the Frequency Distiller as inspired by the iconic Alembic Superfilter SF-2, the studio-grade filter long associated with high-end bass tone shaping. The pedal takes that filtering concept into a dual-channel pedal format.
Sources (1)
- Audiofab Unveils the Frequency Distiller For Bass, Bass Magazine, 2025-06-17