FuzzHugger Algal Bloom Modified

The FuzzHugger Algal Bloom Modified is a fuzz pedal from FuzzHugger Effects. It starts with the maker's classic chord-friendly, overdriven fuzz circuit from the Algal Bloom and enhances its best qualities: more gain and thickness than before, a slightly higher-fi sound, lower overall noise levels, and a touch more sustain¹.

The headline addition over the standard Algal Bloom is the Headroom knob, which FuzzHugger says improves the pedal's chord-friendliness by delivering extra clarity and definition as you turn it right, shifting to a hot-yet-clear, less clipped tone². The maker describes it as great for cleaning up the tone, and for lower tunings and bass².

How it differs from the Algal Bloom

The Algal Bloom Modified is a variant of the Algal Bloom rather than a new circuit family. FuzzHugger's own description of the change is short and specific¹⁴⁵:

For a player, that means the Modified leans harder into high-gain fuzz territory while staying usable on chords, where many fuzzes collapse into mush. The Headroom knob is the tool that keeps chords articulate: turning it right reduces clipping and opens the tone up². Players who want fewer knobs can look at the Algal Bloom Modified 4k, which FuzzHugger describes as carrying four essential controls from the newest Algal Bloom, focused on the circuit's thick high-gain fuzz tones⁶. There is also a version of the Modified sold in a Graphic, Deluxe Clear Finish⁷⁸⁹, and a 2-in-1 that pairs an Algal Bloom Modified with an Algal Bloom O in one enclosure⁹.

The controls

The control set varies slightly between versions, but the core knobs and what they do are consistent across the maker's listings⁴¹⁰⁵.

Some listings label the knobs differently: a Burlap Deluxe Finish version lists them as Highs, OD (Push), Thick, Voltage, Clip (Headroom), and Level, with the Voltage knob described as reducing voltage and relaxing gain and response, and the Clip (Headroom) knob adding clarity and definition as you turn right¹².

Power: 9V to 18V DC

The Algal Bloom Modified requires a 9V to 18V DC center-negative adapter, which is not included, and it takes no batteries⁸¹. Because there is no battery option, the pedal needs a spot on a powered pedalboard from day one.

The wide voltage range is part of the design rather than just a tolerance. The Voltage knob lets you dial the supply voltage down from whatever you feed it, relaxing the gain and response¹⁵, all the way down to just a few volts at full left¹⁵. At full right the circuit runs at full voltage, anywhere between 9V and 18V depending on what you feed it⁵.

On bass and in lower tunings

FuzzHugger specifically calls out the Headroom knob as great for cleaning up the tone, and for lower tunings and bass². Because turning Headroom right shifts the pedal to a hot-yet-clear, less clipped tone, bass players and downtuned guitarists get a way to keep definition that a fully clipped fuzz would lose. Bass players comparing options can also look at FuzzHugger's bass pedal offerings built around the same family.

Finishes and one-of-a-kind editions

FuzzHugger sells the Algal Bloom Modified in small batches and one-of-a-kind finishes, and the finish affects the price¹⁷².

The maker's own pages disagree on the Graphic Deluxe price, listing both $179.00 and $185.00 for that finish, so both are given here²¹. The burlap editions are one-of-a-kind: each is a special 5-layer finish with, in FuzzHugger's words, "lovely depth and colors," plus silver knob labels¹. One Deluxe Graphic finish was inspired by guitar and banjo headstocks produced by Bacon & Day in the 1930s, complete with glass rhinestones⁷.

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