

The Yellowcake MK Ultra is a pedal that combines elements from the traditional octave up circuit and integrates them with a fixed wah circuit using the 'MIND' knob. The 'CONTROL' knob allows users to modify the frequency of the fixed wah. This pedal is designed to be versatile with just these two knobs, offering a wide range of possibilities. It is meant to be paired with a fuzz pedal of the user's preference, but it also lends itself to plenty of experimentation with other types of distortion.
Technical Specifications:
- Mind: Blends the octave up signal into the fixed wah circuit.
- Control: Adjusts the frequency of the fixed wah.
- Power: 2.1mm negative center 9vdc adapter.
The MK Ultra pedal is designed for guitarists and musicians looking to explore unique harmonic effects and experiment with blending octave and fixed wah tones in their music.
Watch the latest video demos and reviews for the MK Ultra 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 Yellowcake MK Ultra 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
$130.50
Fair
$115
Very Good
$99.99
Browse through eBay listings for the MK Ultra 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.
New
$145.00
Discover pedals with similar features or sounds to the MK Ultra. 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.
Voodoo Lab
Proctavia
Dwarfcraft Devices
Super Wizard
DigiTech
Polara
Malekko
Charlie Foxtrot
Mr. Black
Octaves
Catalinbread
Octapussy
Electro-Harmonix
Soul POG
Way Huge
Purple Platypus Octidrive MkII
Tsakalis AudioWorks
Experience Fuzz
3Leaf Audio
Octabvre
Lastgasp Art Laboratories
Octavella
Bananana
Abracadabra
Meris
Hedra
Bigfoot Engineering
Octo Puss Prime
Pine Box Customs
FREE SHIT
DigiTech
WH-5 Whammy V
Check out the latest news and articles from around the pedal world.