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Source Audio Soundblox Pro Poly-Mod Filter

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Source Audio Soundblox Pro Poly-Mod Filter

$241.80 Price Tier: Standard

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Page last updated Jun 30, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 30, 2026.

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5.0 (3)

$241.80 1 available New

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Average Price: $242

Standard/Professional

$70

$251+

Price Tier

In the Filter Effects Pedals category, Source Audio Soundblox Pro Poly-Mod 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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Dive into a world where your guitar's voice bends and shifts in unimaginable ways with the Source Audio Soundblox Pro Poly-Mod Filter. Crafted for musicians who dare to tread uncharted sonic territories, this pedal is a masterpiece of modulation. Whether you're sculpting serene soundscapes or aiming for aggressive rhythmic patterns, the Poly-Mod Filter stands as your canvas. With its intuitive interface and state-of-the-art DSP technology, it offers a playground of tonal possibilities. This isn't just a pedal; it's a revolution under your feet, designed to inspire and transform with every note played.

Key Features:

24 filter effects including phasers, flangers, and tremolos
Built-in digital signal processing for unparalleled sound quality
Intuitive user interface for effortless sound sculpting
7-band equalizer for precise tone shaping
MIDI compatibility for seamless integration into any rig
6 user presets for quick access to your favorite sounds

Product specs

Brand	Source Audio
Model	Soundblox Pro Poly-Mod Filter
Finish	Purple
Year	2010s
Made In	China
Categories	Filter and Wah Pedals

FAQs

What types of modulation effects can the Source Audio Soundblox Pro Poly-Mod Filter produce?: The Source Audio Soundblox Pro Poly-Mod Filter offers a variety of modulation effects, including phaser, flanger, and envelope filter. These effects can be customized with multiple parameters for unique sound shaping.
Can the Soundblox Pro Poly-Mod Filter be used with both guitar and bass?: Yes, the Soundblox Pro Poly-Mod Filter is designed to be compatible with both guitar and bass, providing versatile filter effects for different instruments.
Does the Source Audio Soundblox Pro Poly-Mod Filter have MIDI connectivity?: The Soundblox Pro Poly-Mod Filter includes MIDI input, allowing for integration with other MIDI-capable devices for expanded control and automation.
What power supply is required for the Soundblox Pro Poly-Mod Filter?: The Source Audio Soundblox Pro Poly-Mod Filter requires a standard 9V DC power supply for operation, which is typical for many effects pedals.
How does the Soundblox Pro Poly-Mod Filter differ from traditional wah pedals?: Unlike traditional wah pedals, the Soundblox Pro Poly-Mod Filter offers a range of modulation effects and programmable presets, providing more versatility and control over the sound.

Videos

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Soundblox Pro Poly-Mod Filter Demo

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NAMM '13 - Source Audio Soundblox Pro Poly-Mod Filter and Soundblox 2 Orbital Modulator

Premier Guitar

Source Audio Soundblox Pro Poly-Mod Filter

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Reviews

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PROS

Versatile sound range: envelope filters, phase shifters, flangers, auto-wah
High-quality EQ for sound tweaking
Super quiet, suitable for studio recording
Sturdy build quality despite initial appearance
Intuitive design with extensive tweaking possibilities
Offers both subtle and wild sound modulations
Features 23 configurable filters with 24bit clarity
Includes expression pedal jack and MIDI for enhanced control
Compatible with other Source Audio gear
Functions as both a flanger and phaser, offering two pedals in one

CONS

Initial appearance may seem cheap
Lacks the analog character of Moogerfooger pedals

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Source Audio Soundblox Pro Poly-Mod Filter.

Features and functionality

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The Soundblox Pro BEF offers presets that capture sounds reminiscent of Parliament and Yes songs, noted for their "gooey" texture.
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The pedal requires manual parameter assignment for expression control via the back page menu, indicating a need for detailed setup knowledge.
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The attack sensitivity knob simultaneously adjusts both attack and release of the envelope, limiting the ability to fine-tune these parameters independently.
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Users appreciate the LFO feature but note the minimum rate is faster than preferred for some applications.
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A submenu system allows Q adjustment and expression pedal control, but setting up a satisfying pedal sweep may be challenging for some users.
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Software and compatibility

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The M-Audio expression pedal, despite having a correct TRS out, may not be compatible due to voltage differences; Source Audio's own pedal ensures functionality.
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User experience

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Long-term users highlight the pedal's durability, mentioning its robust construction since 2012-2013, describing it as a "tank" that "rules."
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The pedal's versatility is praised, though some miss the ability to manually tweak fixed parameters like resonance and Q, which are mode-dependent.
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Comparisons

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One user transitioned from the Soundblox Pro BEF to the Source Audio C4 for filter effects, gifting the BEF to a friend who became equally enamored with it.
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Setup and maintenance

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The pedal includes a master gain control, crucial for managing volume spikes from resonant peaks and preventing potential clipping issues.
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Positive Mental Trip

Singer, Guitarist

Verified via YouTube

Luke Weiler of Positive Mental Trip began to take interest in Envelope Filter sounds as opposed to straight up Jimi Hendrix style wah pedals in 2014.(Luke played standard Cry Baby wah pedals 2006-2014) Playing percussion in an experimental reggae band EN KNEE GIVEN DAZE while playing percussion he would watch Gerry Skeletonez play with a vintage Q-Tron and an octave pedal. In a hotel room at the Rock N Roll Resort festival he would play with a Q Tron w/ a Boss octave pedal and knew he needed that in his life. In 2015 after DAZE and BOMBMOB(electro-dub act luke played percussion with on his PMT Hiatus) broke up Luke decided it was time to start playing Positive Mental Trip music again. There were not many PMT shows in 2015 but there began to be many Positive Mental Trip shows in 2016. By the end of 2016 Luke was recording and experimenting live and in the studio with 2 Envelope Filter pedals. The Source Audio Pro Poly Mod Filter and the BOSS AW-3 Dynamic Wah. Both digital Envelope Filter pedals that could be controlled by expression pedal if desired these pedals had loads of options. Luke has played the Source Audio Pro Poly Mod Filter on many Positive Mental Trip recordings but only twice live. He has 4 specific Envelope Wah filter presets programmed into it. Positive Mental Trip’s 2017 album “The Black and White Album” has a lot of digital Envelope Filter wah sounds coming from the Source Audio Pro Poly Mod Filter and a few from the BOSS AW-3. You can hear some Source Audio Pro Poly Mod Filter envelope Filter sounds on the new album “Love Never Dies” as well. The BOSS AW-3 has not been used on the new album. The MOOG MF 101 Low Pass Filter has been used more then any other Envelope Filter on the album. It has a very cool analog Envelope Filter vibe on guitar and bass. It is arguably the best analog Envelope Filter in existence. (Among the other legendary analog filter EHX Q-Tron, Mike Biegel MUTRON) So yes, Luke Weiler of Positive Mental Trip plays a Source Audio Pro Poly Mod Filter. A huge fan of the effect on lead guitar and rhythm guitar as well.