USD $ 310.00
Out of stock

A world of experimentation!

The OFF1 pedal features 3 analog stand alone circuits in series: Octave (sub1 & sub2), Fuzz (with switchable octave up effect) and Ladder Filter.

Octave and Fuzz can be used individually for a more canonical approach of the two effects, while from their combination brings more experimental results.

The first effect in the internal signal chain is the Octave and then in series come the Fuzz and the ladder Filter.

By applying the Fuzz’s high octave effect and Filter on the low octaves you get out of the ordinary sounds and synth-style effects.

Lets take a look at each circuit.

Octave : The Octave circuit belongs to the family of the old monophonic octaves and can add the two octaves below the original note. Each octave has a separate volume control and plays back with outstanding clarity, thanks to the very precise and fast-tracking circuit, which allows even bridge pickups to be used without difficulty.

Fuzz : Fuzz has an edgy and grumpy character; it doesn't like being compared to other Fuzz tones. It’s capable of producing a wide range of tones from every fuzz era with careful tweaking of Gain, Tone and Mid frequencies controls. From thin and harmonic, to thick and growling. A pair of diodes is also used in the circuit to achieve the octave doubling effect reminiscent of the old octave up tones of the late 60's and early 70's. The high octave can be activated manually via the toggle switch or via the left footswitch when the pedal is in Mode 2.

Filter : The filter circuit belongs to the family of the legendary synths ladder filters and comes with the inevitable Cutoff and Resonance controls. You can crank the resonance and sweep the cutoff to hear those characteristic and wonderful harmonic peaks. The Cutoff control can also be controlled via an expression pedal (or CV) using the dedicated rear jack. The filter works combined with the Fuzz when the filter toggle switch is positioned downwards.

Mastro Valvola OFF1 Fuzz, Octave & Filter features:

• 3 analog circuits: Octave (sub1 & sub2), Fuzz (with switchable octave up effect) and Ladder Filter.

• Synth-style ladder filter

• 2 footswitches configuration modes.

• Footswitchs can be used in latching or momentary mode.

• Expression pedal input.

• Power: 9V DC.

• Current Draw: 100mA.


Technical Specs

Mastro Valvola
  • Filter
  • Fuzz
  • Octave & Harmonizer
Current Draw:
Power Supply Included:
Manufacturer Warranty:
1 year

No posts found

Write a review

Secure Shipping

We’ve sent thousands of packages all around the globe.

Each order is packed with your best interest in mind.

Same Day Shipping

Orders placed before 3pm EST will ship the same business day.

Orders placed after 3pm EST will ship the next business day.

An update with tracking details will be sent shortly after purchase.

Free Shipping

✔ FREE Shipping on all orders shipped within Canada!*

✔ FREE Shipping on all orders shipped to the USA!*

✔ FREE Shipping on orders over 399$US shipped to the rest of the world!

Shipping carrier used

✔ UPS.

Delivery Time

✔ Canada : 1 - 2 business days.

✔ USA : 1 - 2 business days.

✔ Rest of the world : 3 - 5 business days.

(Please note: business days don’t include weekends and holidays)

Electric Mojo Guitars ships to










Hong Kong





Korea (South)



New Zealand



Puerto Rico






United Kingdom

Please contact the shop for a shipping quote if your country is not listed here.

Hassle-Free Returns

If you’re not satisfied with your purchase, return it within 45 days and we'll send a full refund for the item.

How to return

Please pack the item carefully in a box and use a shipping method that includes tracking.

Please note that returned items must be received in brand new condition.

Items must be returned in their original packaging with all included material.

If an item is returned in undesirable condition, a 25% restocking fee will be charged.

What to do if you receive a defective product

If you receive a defective product, please contact us so we can create a return label for you.

Non-returnable items

✔ Used and clearance sales are final.

✔ Pickups, Cable Kits, Guitar Straps and Book sales are final.

✔ Gift certificates are non-refundable.

✔ Pre-order and special order deposits are non-refundable.

Frequently Asked Questions

A : On each product page, you can find an Availability status for the product.

Products with the mention 'Availability: In stock' are in stock and ready to ship.

Products with the mention 'Availability: Out of stock' are not currently in stock.

For out of stock products, you can ask to get notified as soon as the item arrives back at the shop. Simply enter your

email address in the 'Notify me when available' field and the website will automatically send you an update as soon

as the product is back in stock.

A : We’re in Quebec, Canada.

A : Yes! We’re in Blainville, Quebec.

Contact us to schedule an appointment.

A : The shop’s website accepts credit cards (Mastercard, Visa, Amex) and Paypal payments.

A : We ship with UPS.

A : Shipping to Canada and the USA is free on all orders.*

Shipping to the rest of the world is free on orders over 399$US.

Visit the Shipping Policy page for more infos.

* Certain products are excluded due to manufacturer restrictions. This includes Strymon Pedals.

A : Yes. Canadian residents are asked to pay sales taxes:

Alberta: 5%.

British Columbia: 5%.

Manitoba: 5%.

New Brunswick: 15%.

Newfoundland and Labrador: 15%.

Northwest Territories: 5%.

Nova Scotia: 15%.

Nunavut: 5%.

Ontario: 13%.

Prince Edward Island: 15%.

Quebec: 14.975%.

Saskatchewan: 5%.

Yukon: 5%.

A : No. Canadian customers will not be charged import fees.

A : No. USA residents will not be charged import fees.

A : Shipping prices do not include VAT or other import taxes which vary from country to country. Customers

outside of Canada and the USA are responsible for paying any import taxes and duties that may be charged by

their government. Orders that come back to the shop as refused by the customer will receive a refund minus

shipping. Please watch tracking on your shipments to be aware of customs processing and delivery.

A : While we do understand that customs fees are an annoying part of international purchases, we cannot offer to

declare a lower value on customs documents. Customers outside of Canada and the USA are responsible for paying

any import taxes and duties that may be charged by their government.

Enter your email to stay in touch!