would this work for a 'sensitive' instrument like a 'piezo pickup' lap harp?...thanks

It'll work, but it's simply on or off type sound. It doesn't respond to playing quietly very well, it sounds like it has a noise gate that kicks in when you pick harder. If you want full on octave fuzz then it will do the trick. But not for dynamic playing such as a fuzz face.

Mxr M103 Blue Box Octave Fuzz

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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€ 261.23

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Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔵 Command the stage with the MXR Blue Box — where fuzz meets fearless low-end!

TWO OCTAVES OF SONIC CHAOS - Transforms your guitar signal with fuzz and duplicates it two octaves down for a uniquely wild soundscape.
POWERED FOR ENDLESS SESSIONS - Runs on a single 9V battery or Dunlop’s ECB-003 adapter, keeping your creativity unplugged or plugged in.
UNLEASH YOUR SIGNATURE SOUND - Known for its chaotic personality, every session becomes a fresh, unpredictable sonic adventure.
COMPACT DESIGN MASSIVE IMPACT - Lightweight and portable at just 0.5 lbs, perfect for the gigging pro who demands tone on the go.
DIVE DEEP WITH EARTH SHAKING LOW END - Shovels out monstrous low frequencies that command attention and scare the competition.

The MXR M103 Blue Box™ Octave Fuzz is a compact, analog effects pedal delivering powerful fuzz combined with two octaves down, powered by a 9V battery or adapter. Renowned for its deep low frequencies and chaotic tonal character, it’s a must-have for guitarists seeking a bold, unique sound.

Specifications

ASIN	B0002GY9Y0
Amperage	9 Milliamps
Audio Output Effects	Fuzz, Eighth down, Signal mix
Best Sellers Rank	7,765 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 2,291 in Recording & Computer
Brand	MXR
Brand Name	MXR
Colour	Blue
Connector Type	1/4 inch audio jack
Controls Type	Knob
Country of Origin	Taiwan
Customer Reviews	4.3 out of 5 stars 102 Reviews
Global Trade Identification Number	00710137006546
Hardware Interface	1/4-inch Audio
Included Components	9 volt battery
Item Weight	0.5 Pounds
Item weight	0.5 Pounds
Manufacturer	Jim Dunlop
Manufacturer Part Number	11103000001
Model Name	11103000001
Model Number	11103000001
Power Source	Works with a DC power supply
Signal Format	Analog
Sound Profile	Low-midrange with prominent harmonics
Style	Compact
UPC	710137006546 962327363834 710137065208
Unit Count	1 Count
Voltage	9 Volts

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