Catalinbread Dirty Little Secret Deluxe

A "Deluxe" Evolution Designed as a True Marshall Amp at Your Feet

The Dirty Little Secret Deluxe follows the lineage of pedals that capture the spirit of a Marshall Plexi : snappy attack, expressive mids, and that famous "kerrang" that built the rock sound. Here, the approach goes beyond emulating a simple gain stage: the pedal integrates blocks usually associated with amp architecture (phase inverter, simulated power section, output transformer) to achieve a more organic response closer to a pushed amp.

This Deluxe version also modernizes ergonomics: the Super Bass / Super Lead selector and Presence control are now directly accessible for instant adjustment of brightness and bite without opening the enclosure.

Who It's For and Which Styles the Dirty Little Secret Deluxe Excels In

The Dirty Little Secret Deluxe is aimed at guitarists seeking an authentic British tone on any backline: too tame clean combos, US-style amps, or modern heads used as a platform. It can become your always-on sound base (light dynamic crunch) or your main saturation engine, covering classic rock to hard rock, as well as punk, heavy, stoner, and muscular blues-rock.

In the studio, it excels at stacking tight rhythm tracks with mids that naturally sit in the mix. Live, the Super Bass / Super Lead switch and integrable boost allow you to move from a crunchy verse to a denser chorus, or make a solo stand out without losing definition.

Controls, Modes, and Setup Tips

The heart of the pedal operates like an amp: Master is placed before the phase inverter and transformer (like a real circuit), while Preamp controls the amount of drive with an extended range, offering cleaner lows at the bottom and more pronounced Marshall saturation at the top.

Presence becomes a formidable finishing tool: it is an external low-pass filter that attenuates about 3 dB above 1.59 kHz when set to minimum, then progressively opens the upper spectrum. The 3-band EQ (Treble/Middle/Bass) is based on a passive Marshall-style design: interactive, musical, and perfect for shaping the tone according to your pickups and amp.

The Boost section is designed as a tube preamp stage simulator, usable independently. Thanks to the internal Effect Order, place it before the DLS to load the input and achieve denser saturation with a more aggressive JCM spirit, or after to increase overall volume without sacrificing clarity. An internal Tightness control (high-pass filter) tightens the low end: up to 230 Hz for a cleaner palm-mute and more modern rhythms.

The Sound

Expect responsive saturation : the Dirty Little Secret Deluxe reacts very well to guitar volume and picking attack, with a blend of grain, dynamics, and slight compression reminiscent of a pushed amp. In Super Lead, the sound becomes more incisive, more present in the upper mids, ideal for snappy riffs and cutting leads. In Super Bass, you gain roundness and thickness, perfect for fatter rhythms and a smokier low-mid range.

The Dirty Little Secret family is found on pedalboards of artists like Joe Trohman (Fall Out Boy) and Paul Leary (Butthole Surfers), proof of its status as a classic "Marshall-in-a-box" when it comes to getting a big rock sound without hauling a full backline.

Technical specifications

Effects	Preamp, Cabinet Simulator, Overdrive	Type	sector
Technology	Analog	Use	electric guitar
Format	Pedal	Color	Grey
EQ	3 channels

Integrated blocks	phase inverter, power amp simulation, output transformer	Instrument input	6.35mm Jack
Main controls	Master, Preamp	Standard output	6.35mm Jack
Presence	external low-pass filter (cutoff reference at 1.59 kHz)	Dedicated Line Out	+10 dB (usable simultaneously with standard output)
Marshall-style passive 3-band EQ	Treble, Middle, Bass	Power supply	not included
Independent Boost section	Boost, Boost Vol	Battery	no
Mode selector	Super Bass / Super Lead	Required power supply	9V DC center negative
Internal Tightness control	high-pass filter up to 230 Hz	Consumption	minimum 7 mA
Internal Effect Order switch	boost before or after the DLS section