Warm Audio Centavo Mod Overdrive pedal review

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What is it?

Few pedals have generated as much mythology as the Klon Centaur. The original gold overdrive became a fixture on coveted pedalboards, partly because it did something less obvious than simply piling on distortion.

With its gain low and output raised, it could push an amplifier harder while giving the guitar a firm, articulate midrange presence. The originals now fetch extraordinary prices, and the world is not exactly short of pedals promising to get you into Klon orbit.

Warm Audio introduced the original Centavo in a large, vintage-inspired gold enclosure. The Centavo Mod carries over its circuit design and component choices in a considerably smaller, champagne-gold housing.

Specs

(Image credit: Warm Audio)

Launch price: $189 | £189 | €219

Type: Analog Klon Centaur-style overdrive / boost

Controls: Gain, Treble, Output; rear MOD low-end switch

Features: TL072 op amps, vintage-style clipping diodes, charge-pump voltage regulator, gold compact enclosure, oxblood-style knobs

Connectivity: 1/4-inch instrument input and amp output

Bypass: Buffered bypass

Power: 9V battery or 9V DC pedal adapter; 40mA current draw

Dimensions: 64 W x 56 H x 114 D mm

Weight: 11.2oz / 0.32kg

Contact: Warm Audio

Build quality

Warm Audio Centavo Mod — (Image credit: Future/Lucy Robinson)

Build quality rating: ★★★★½

The original Warm Audio Centavo looked the part, but its large enclosure took up more pedalboard space than three knobs really needed. The Mod keeps the champagne gold finish, Centaur graphic and dark oxblood controls, but squeezes everything into a much smaller footprint.

The Centavo Mod feels sturdy and well-built, with a rugged metal enclosure and top-mounted connections. The plastic knobs have a nice, substantial feel, turning smoothly with just the right amount of resistance for making precise adjustments. The footswitch is equally satisfying, with a firm, positive click that leaves no doubt when it’s engaged, while a red LED provides a clear visual indication.

The rear-mounted MOD switch is nicely tucked away from accidental knocks, although it’s not really convenient for adjustments on the fly. Overall, it’s a well-built, no-nonsense pedal that feels more than capable of handling regular gigging.

Usability and features

Usability and features rating: ★★★★½

The control layout is fairly simple and easy to navigate. You’ve got three familiar controls: Gain, Treble and Output, and there’s plenty of flexibility in how you use them. Keep the Gain low and turn up the Output for a terrific boost that adds punch and presence to your tone.

I like the tighter response of the standard setting, although the added fullness of the MOD setting is useful with thinner sounding single coil pickups

Bring up the Gain and you start getting more of the pedal’s own overdrive, with plenty of grit and bite when you need it.

Using the Centavo with both my Strat and Les Paul through a Dr. Z Remedy and comparing it with an Electro-Harmonix Soul Food and an Acorn Amps Klon-style overdrive pedal. Both are very good pedals, but what really impresses me about the Centavo is how lively and responsive it feels.

There’s a naturalness to the way it works with the amp, almost as though you’re simply getting more of what you already love about your tone. The Soul Food and Acorn certainly get you into familiar Klon territory, but neither quite matches the Centavo’s harmonic richness or the way it responds to my picking. The difference is noticeable, especially when digging into a note or letting a bend sing.

Warm Audio Centavo Mod

(Image credit: Future/Lucy Robinson)

The rear-mounted MOD switch is another nice touch. In the up position you get a little more fullness in the low end, particularly on the bottom two strings. It’s not a dramatic change, but it gives the sound a little extra body when you want it.

I like the tighter response of the standard setting, although the added fullness of the MOD setting is useful with thinner sounding single coil pickups. My only gripe is that the switch is tucked away on the back, so making adjustments on the fly isn’t especially convenient.

Sounds

Sounds rating: ★★★★½

There’s a reason why Klon-style overdrives have been so popular for so long, and the Centavo Mod makes a convincing case for what all the fuss is about. With the Gain turned down, it’s less about distortion and more about adding punch, clarity and presence.

Notes have more snap, chords sound fuller, and there’s a richness in the harmonics that makes everything feel more alive. The pick attack is outstanding, with an immediate, responsive feel that really lets you dig in.

Turn up the Output, keep the Gain low and you’ve got a terrific boost that adds muscle without completely changing your guitar or amp’s character. Single coils gain some body, while humbuckers benefit from added definition and presence.

With my Dr. Z Remedy already cooking, kicking on the Centavo takes things up a notch. There’s more bite, richer harmonics and more depth to the sound, with singing sustain that really makes lead lines come alive, especially on bluesy bends.

Bring the Gain up around noon and the pedal reveals its dirtier side, delivering a gritty, slightly compressed overdrive that’s right at home with blues and classic rock. There’s plenty of bite and warmth, but what really stands out is how well it responds to your playing. Dig in for more grit and harmonics or lighten your touch for a smoother character. It’s not a high-gain distortion pedal, but it can certainly thicken up an already overdriven amp.

It makes an already good guitar tone sound bigger, livelier and more exciting without getting in the way

The Treble control offers plenty of bite, while backing it off warms things up and smooths out the edges without losing clarity. Flip the rear MOD switch up and you get a little extra low-end weight, particularly on the bottom two strings. It’s a subtle difference, but useful when you want a fuller sound without sacrificing the pedal’s natural character.

What I like most is how connected the Centavo Mod makes you feel to your guitar. Between the crisp pick attack, rich harmonics and smooth, singing sustain, it’s a real pleasure for expressive lead playing. It makes an already good guitar tone sound bigger, livelier and more exciting without getting in the way.

Verdict

Warm Audio didn’t reinvent the Klon formula with the Centavo Mod but they did put it in a smaller enclosure. And for $189, there’s a lot to like, especially considering what an original Centaur costs these days.

For $189, there’s a lot to like, especially considering what an original Centaur costs these days

Now there are some limitations. The mid-forward sound may not suit players looking for a completely neutral boost, the rear MOD switch is awkward to reach during a set, and turning the Gain up can give the drive a rougher edge.

Those are worth weighing against its strengths as an amp-driving boost. If you already like your amplifier’s basic voice and just want more punch, definition, harmonics and sustain, the Centavo Mod makes a compelling case at $189.

MusicRadar verdict: I’ve played plenty of Klon-inspired pedals, but never an original Centaur. I can’t say how closely this one compares, but the Centavo Mod delivers what I’ve always imagined: rich harmonics, outstanding pick attack, singing sustain and a wonderfully responsive feel, all in a compact, affordable package.

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Ratings scorecard
Test	Results	Score
Build quality	Compact champagne-gold metal enclosure, roomy controls and practical top-mounted jacks. Solid construction, although the rear MOD switch is awkward to reach.	★★★★½
Usability and features	Easy three knob operation with plenty of boost, responsive gain and a useful bass option. The rear switch limits quick changes onstage.	★★★★½
Sounds	Exceptional pick response, rich harmonics and singing sustain. A lively, articulate boost that brings out the best in an already good amp.	★★★★★
Overall	An engaging, well-built Klon inspired drive that delivers outstanding sound and feel in a compact enclosure at a sensible price.	★★★★½