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Stone Deaf FX PDF-1X Parametric Distortion Filter

Stone Deaf FX PDF-1X Parametric Distortion Filter main image

Photo of Stone Deaf FX PDF-1X Parametric Distortion Filter and more gear in a guitar, bass, and signal chain

Photo of Stone Deaf FX PDF-1X Parametric Distortion Filter and more gear in a studio, guitar, and bass

Stone Deaf FX PDF-1X Parametric Distortion Filter

$160.34 Price Tier: Standard

5.0 (3)

1 Review

Newer option

Stone Deaf FX PDF-2 Parametric Distortion Filter

$150.00

4.5 (25)

Find out who is using Stone Deaf FX PDF-1X

3 community setups

4 wishlisted

16 saved

Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated July 4, 2026.

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5.0 (3)

$160.34 1 available Used

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Average Price: $160

Standard/Professional

$80

$181+

Price Tier

In the Distortion Effects Pedals category, Stone Deaf FX PDF-1X Parametric Distortion Filter is priced in the upper end of the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

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Description

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Dual footswitches. Expression control. Parametric EQ. High-gain and low-gain flexibility. It’s all here. And as well as combining the best features of the PDF-1 and PDF-2 in a single pedal, the PDF-1X also comes with a shiny new feature – a volume knob. This helps it play nicely with other pedals, and opens up a new range of tonal options across the clean and dirty channels. The gain control is now an internal trimpot, which is pre-set to PDF-1 territory but can be ramped all the way up into PDF-2 high-gain anarchy if that’s your bag.

With that added versatility, the PDF-1X gives you boost, overdrive, distortion, and fuzz in one pedal. Not to mention the parametric EQ control and expression pedal functionality for precise tweaking and phaser or wah sounds. It’s a lot. But you’re worth it. And you get to decide if it’s a set-and-forget, always-on secret sauce for your playing, a versatile scalpel for finding the perfect tone in the studio, or anything in between.

Videos

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Rabea Massaad

I JUST CAN'T STOP PLAYING!!! | Stone Deaf PDF-1X

Rabea Massaad

Stone Deaf PDF-1X Limited Edition

AndyDemos

Stone Deaf PDF-1 X - Parametic Distortion Filter Guitar FX Pedal Demo / Review

TheGuitarGeek

Reviews

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PROS

EQ and clean boost capabilities enhance versatility
Adds width and dimension to sound, especially on scooped amps
Useful for dialing in precise EQ in live and recording settings
Can make guitar sit perfectly in a band mix
Effective on various instruments, including synths and bass
External volume knob allows for unity volume operation
Provides a close approximation to Josh Homme/QOTSA tone
Built-in distortion works well when paired with other pedals
Allows for focused sound by boosting specific frequencies
Retains clean tone integrity even when engaged

CONS

Distortion quality considered just okay by some users
May sound subtle or lack impact when used with clean amps

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Stone Deaf FX PDF-1X Parametric Distortion Filter.

Features and functionality

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The PDF-1X's distortion is controlled by an internal trim pot, set by some users to 70% for a warm, fuzz-face-like tone.
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The PDF-1X can be paired with an EP-1 expression pedal to function as a dedicated wah, offering versatile sound shaping.
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The clean/dirty switch allows for using just the EQ without distortion, providing flexibility in tone shaping.
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The PDF-1X is compatible only with the discontinued Stone Deaf EP-1 expression pedal, limiting external expression pedal options.
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User experience

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Owners appreciate the PDF-1X’s ability to clean up well with a guitar's volume knob, making it suitable for dynamic playing styles.
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Some users report difficulty initially dialing in tones due to the pedal's broad range, indicating a learning curve is involved.
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Comparisons

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Some owners prefer the PDF-1X over the PDF-2 due to its volume pot, which offers more practical volume control when engaged.
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The PDF-1X is seen as an improvement over the Maestro circuit, suggesting its design offers enhanced tonal control.
Source

Value and pricing

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One owner found the PDF-1X second-hand at GuitarGuitar for about 25% off retail, highlighting potential savings in the used market.
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5.0 out of 5

Based on 1 Review and 3 Ratings

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matt_gilson

125

over 2 years ago

Great Parametric EQ!

So this is a unique one to have on your pedal board! If you’re buying for the distortion it’s just ok. The real thing here is the EQ and clean boost to me! If running on a clean amp it may sound subtle to you.

Thing is when you EQ up, it can be perceived as volume. Or even sound like more width and dimension is added. Very cool to try on a scooped Fender amp! But the way I use it is into an Ampeg VT-40 cranked. As well as on my Sky King amp with a Muff and Rat pedal. You’ll notice the EQ changes more so running into distortion, or a very driven amp. It can add punch, and let you dial where you sit in the live band mix. Insanely valuable if you’re like me, and record all your own music.

I bring in 80% finished songs, and write my guitar parts in a recording space. With this pedal, I can adjust to my demo mixes playing over a PA, and nail my EQ tone before the mixing stage. In a band setting you can put yourself in the middle, back or do cool filter stuff. Sound thin, cocked wah or my favorite boost the low mids with a wide Q band. It makes everything focused, and you can just sit right in the mix.

Would def recommend for anyone playing in a band with more than one guitar player, or if you battle your bass player. Also for those that produce in the box with a busy mix of synths, this is a great tool to shape your guitar sound live to fit mixes and be heard. It also does the thing people buy this for, but it’s not a QOTSA pedal in a box. You need something on the other end…be it a tweed, Ampeg, Marshall, Rat, Muff or SFT pedal. The built in distortion is ok, and would work in a pinch for things.

But the power is in pairing this with grit. Also it’s really great on synths, and even bass! Just such a great tool to have whether it’ll be a boost with EQ, or even an always on behind the amp. I’d use two if I could afford it. One set on the low mids always on, then one up front first to dial in my pedals. I love the mid setting, as it just works on muffs and rats no fuss or extra stacking. Turn it off and your clean is still in tact, without it sounding like a pedal is on.

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