SKU: 38093494014
harmonica anti feedback pedal

harmonica anti feedback pedal On Sale* Harp Rod PI Effects Harmonica Pedal. Feedback P.I. Pedal. In – RockinRonsMusic

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Description

harmonica anti feedback pedal On Sale* Harp Rod PI Effects Harmonica Pedal. Feedback P.I. Pedal. In – RockinRonsMusicFeedback is an elusive criminal. Thats why you need a detective! The Feedback P. I is a device that will help you eliminate the threat of feedback on any stage. It combines the three main approaches for fighting feedback all in one box: An active notch filter, a noise gate, and a Vol knob that can act as a PAD. The active notch filter will take care of the fundamental frequencies that are causing feedback. The Noise Gate acts as a life insurance,

Feedback is an elusive criminal. That’s why you need a detective!

The Feedback P.I is a device that will help you eliminate the threat of feedback on any stage. It combines the three main approaches for fighting feedback all in one box: An active notch filter, a noise gate, and a Vol knob that can act as a PAD. The active notch filter will take care of the fundamental frequencies that are causing feedback. The Noise Gate acts as a life insurance, cutting the signal while you are not playing. The Vol knob goes just a couple of decibels above unity, so it can be used as a PAD if you are forced to use a higher gain amp.

How to use:

Right is IN

Left is OUT

1.- Set the VOL knob at unity (just a few degrees lower than fully clockwise).
2.- Start with the FREQ knob all the way to the right.
3.- Turn your amp and pedals past the feedback threshold. The idea is to intentionally create feedback.
4.- Once the feedback appears, start turning the FREQ knob to the left until the feedback goes away. You’ll likely find a few spots (or a range) where feedback disappears, but try to find the optimal position at the higher end of the frequency range.
5.- (Optional) Set the Noise Gate to 12 o’clock and engage the switch (up position). If your band is loud, you might need to turn the knob further to the right.
Volume: Set the Vol at unity if you are using a feedback-friendly amp. If you are using a high-gain amp, move the Feedback P.I to the end of your chain and set the Vol knob to 12 o’clock. This will turn the pedal into a PAD that will help to reduce the gain of the amp.

FREQ: This knob sets the frequency affected by the notch filter. It ranges from 400hz to 7000hz. The goal is to find the highest offending frequency. This will better preserve your tone.

ON: Turns the noise gate on or off. When off, the noise gate is bypassed.

GATE: Sets the threshold of the Noise Gate.

Right is IN

Left is OUT

The power consumption of the Feedback P.I. is around 20mA. It doesn't need much power to run, so any 9V DC (center negative) Power Supply should be enough to power this pedals and a handful of others. 

 

Feedback Pedal

User Manual

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SKU: 38093494014

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Jomar Martinez
West Palm Beach, US
★★★★★ 5
A+
Color: 14Pcs Eufy E25/E28/C28 Bags
A+
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Reviewed in the United States on March 15, 2026
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REALiZEx
Lowell, US
★★★★★ 5
Work just like the originals
Color: 14Pcs Eufy E25/E28/C28 Bags
Work just like the originals. Will buy again
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Reviewed in the United States on August 4, 2025
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Chris H
Phoenix, US
★★★★★ 5
It fits
Color: 14Pcs Eufy E25/E28/C28 Bags
Fits my eufy 25 perfectly
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Reviewed in the United States on July 21, 2025
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joseph torres
Boise, US
★★★★★ 5
Precise fit
Size: Eufy E25 Omni / E28 Omni E28
Perfect fit for eufy E28 system Follow instructions and you will be a happy camper.
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Reviewed in the United States on March 18, 2026
M
Matt M.
Battle Creek, US
★★★★★ 5
Decent Accessory Kit
Size: Eufy E25 Omni / E28 Omni E28, Size: Eufy E25 Omni / E28 Omni E28
This is a decent accessory kit I got for my E28! This kit comes with so many of the parts I needed to keep my E28 up and cleaning well. The accessories each fit my bot very well - the roller brush slid on with no issue and it didnt bind in any way. The knap on the brush is decent (a bit knappier than the OEM). This is nice because I have textured tile so a better knap will help clean inside the nooks and crannies. The kit comes with a lot of the needed items for the bot. One negative (but I didnt take away a star because this can happen in others as well) was that the cardboard on the dust bag didnt have enough glue to keep the bag on the stock board - it tore away super easily which was a bummer to lose a whole bag. Not the end of the world, but be carful inserting the bag properly to avoid tearing it away/open. All in all this is a decent kit and is a fraction of the price of others. Additionally, it is one of the least expensive kits on Amazon, which is nice - because we all could stand to save a buck or two.
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Reviewed in the United States on May 5, 2026

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