
Anthony Easton
The Mad Professor Royal Blue Overdrive is an extremely touch-sensitive overdrive pedal designed to offer a wide range of tones from light overdrive to distortion. It features four highly interactive controls: Volume, Drive, Treble, and Bass, providing a versatile range of tonal possibilities. The pedal is designed to be transparent, emphasizing the natural characteristics of the guitar and amplifier without adding coloration to the original tone.
Key Specifications:
- Controls: Volume, Drive, Treble, Bass
- Volume: Sets the overall output level of the pedal
- Drive: Controls the amount of distortion, offering dynamic response
- Treble: A boost/cut "shelving" type equalizer for high-end control
- Bass: A boost/cut shelving type equalizer for low-end control
- Settings: Midboost and Midcut options available
- Electrical Specifications:
- Current draw: 3.5mA at 9V DC
- Input impedance: 140K
- Output impedance: 25K
- Voltage range: 7.5-12V's
- Power Requirements: 6F22 9V battery or DC eliminator 2.1 mm plug center
negative and positive sleeve
The Royal Blue Overdrive is designed to provide a transparent tone that can be tailored using the Treble and Bass controls. It can be used to create tube amp-like crunchy effects and offers a high level of expressiveness, allowing users to determine the amount of breakup by adjusting picking force and volume knob settings on the guitar.
The pedal's design enables it to be utilized for various use-cases, including as a boost to push the front end of a lightly driven amp, creating a slightly different feel and tone. Additionally, it can be used to achieve a whole world of versatile tones without significantly altering the original sound.
Watch the latest video demos and reviews for the Royal Blue Overdrive from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

Below are live Reverb listings for the Mad Professor Royal Blue Overdrive from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.

Brand New
$195.15

Brand New
$199.99

Good
$145.82

Brand New
$305.49

Brand New
$229.82

Brand New
$203.31

Brand New
$260

Excellent
$149.99

Browse through eBay listings for the Royal Blue Overdrive compiled in real-time. From vintage finds to brand-new units, see a variety of purchasing options. This automated collection helps you explore deals and find the right pedal at the right price.

Used
$166.05

New
$401.62

Discover pedals with similar features or sounds to the Royal Blue Overdrive. This section leverages data to suggest alternatives that complement or expand your pedalboard. Ideal for exploring related sounds or finding a pedal that matches your specific needs.

Dwarfcraft Devices
The Internet

Fredric Effects
Do The Weasel Stomp! MKII

Tsakalis AudioWorks
Crown

Caroline Guitar Company
Wave Cannon MKII

Gamechanger Audio
Plasma Rack

JPTR FX
Tesla Wolf

KMA Audio Machines
Dead Stag

Moog
Minifooger MF Boost

Rivera
Shaman

Wren and Cuff
Box of War

British Pedal Company
Tone Bender MKI

Moog
Minifooger Drive

Crazy Tube Circuits
Unobtanium

Gurus
Ninja Tube Distortion

Tanabe
Dumkudo

EMMA Electronic
StinkBug
Check out the latest news and articles from around the pedal world.

Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton