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Description
signal blender pedal GFI System Duophony – Motor City GuitarGFI System Duophony Advanced Parallel Signal Blender Pedal About the Product Parallel Blender: A pedal that blends the signals from 2 or more sources. Duophony is their take on the lowly 'parallel blender' pedal. They took the basic concept of blending two effects together to the next level by integrating the classic signal blender functionalities with modern features and intuitive user interface. The result is a solid blending machine, optimized to
GFI System Duophony Advanced Parallel Signal Blender PedalAbout the Product
Parallel Blender: A pedal that blends the signals from 2 or more sources.
Duophony is their take on the lowly 'parallel blender' pedal. They took the basic concept of blending two effects together to the next level by integrating the classic signal blender functionalities with modern features and intuitive user interface. The result is a solid blending machine, optimized to help you unleash the unexplored ideas of parallel blending and discover new ways of sculpting limitless soundscape!
Full stereo signal paths
Duophony features full stereo signal paths throughout. TRS jacks supports both mono and stereo connections for the inputs and effect loops, while dedicated Left and Right TS jacks are provided for the outputs.
Hassle-free blending with presets
16 presets, readily accessible via the two on-board footswitches, external aux-switches, and MIDI.
Expressive Flexibility
Adjust blending ratio or the Dry signal level at will with an expression pedal!
Fully configurable Heel and Toe values for flexible expressive control. Expression pedals with 10 KOhm pot value are supported.
Modulated Blending
A unique feature that Duophony has is “Modulated Blending”, the ability to modulate the blending action with an internal LFO. When modulation is activated, an internal LFO will produce a waveform whose shape maps directly to the blend ratio. Modulation speed can be controlled via expression pedal, tap-tempo, or MIDI clock.
Comprehensive external control
• Expression Pedal - with adjustable heel and toe values.
• Aux Switches - accepts up to 3 external switches for versatile control (tap-tempo, bank up/down, etc).
• MIDI In - nearly all features and functionalities of the pedal are opened to MIDI access, including MIDI clock.
Purity and Precision
100% analog signal paths, coupled with high headroom and low-noise design preserve your signals and tone.
Precise digital control provides seamless user interface and ease of use.
Features:
• Input impedances: 1M Ohm.
• Output impedances: 500 Ohm.
• Current draw: 150 mA.
• Input / Sends / Returns jacks: 1/4 inch TRS.
• Output jacks: 1/4 inch TS.
• Expression / Aux input jack: 1/4 inch TRS.
• MIDI Input connector: 1/8 inch TRS.
• USB connector: Type C
• Dimension: 9.7 x 12 cm (3.8 x 4.7 inch)
• Power requirement: 9VDC / 150mA, negative-center plug (Power supply is not included).
• True stereo on all (inputs, outputs, & FX loops) signal paths.
• Parallel or Series routing modes.
• 3 parallel blend modes: XY mix, Y plus [X], and X plus [Y].
• 16 Presets.
• Fully adjustable dry signal level.
• Phase invert function on loop X.
• Individual gain control for each loop.
• Bypass function with or without trails.
• Expression pedal and Aux switches control input.
• MIDI input.
• Full-featured modulation engine.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
Oopsy Daisy, bad for not reading directions!
Color: PDRN 25%
Oops 😬, I forgot to mix this PDRN serum with my hyaluronic serum before applying on my skin. Instead I have been applying it directly on my face 2x daily. I have noticed major improvement on my skin. My skin is dewy, bright, and flawless. Fortunately, I did not experience any skin reactions the undiluted product. I will come back and stock up on these bottles to mix with hyaluronic serum for microneedling.
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Reviewed in the United States on December 26, 2025
★★★★★ 4
The Skin Regenerator Your Routine Is Missing
Color: PDRN 25%
If you've been dealing with dull, dehydrated skin or feel like your usual creams just aren't cutting it anymore, the Salmon DNA PDRN 250,000 ppm Concentrate might be the missing piece. I started using this booster three months ago, and it has genuinely transformed the texture and bounce of my skin.
What problem does this solve?
As we age or expose our skin to environmental stress, our natural cell regeneration slows down, leading to dullness, loss of firmness, fine lines, and a damaged moisture barrier. This PDRN concentrate essentially acts as a cellular "wake-up call." Salmon DNA shares a remarkably high biocompatibility with human skin, helping to repair DNA damage, reignite collagen production, and speed up the skin's natural healing process.
Features & Benefits
· Regenerative Power: Packed with 25% (250,000 ppm) PDRN (Polydeoxyribonucleotide) to repair and rejuvenate.
· Wrinkle & Texture Refinement: Helps improve elasticity and reduce fine lines for smoother, more resilient skin.
· Hydration & Barrier Support: Formulated with Sodium DNA and Panthenol to deeply replenish moisture and soothe sensitivity.
· Booster Format: A versatile concentrate you mix with your moisturizer or serum to amplify your entire routine.
· Enhanced Complex: Includes EGF (Epidermal Growth Factor) and Peptides for added collagen support.
Pros
· ✅ High concentration of active ingredients for noticeable results.
· ✅ Excellent for post-procedure skin (non-irritating after microneedling).
· ✅ Improves overall skin health, not just surface appearance.
· ✅ Suitable for all skin types looking for anti-aging or hydration.
Cons
· ❌ Texture can be sticky – it leaves a slight residue on your fingers and face that takes a few minutes to absorb.
· ❌ Requires consistency – results are not instantaneous and need regular use to build.
· ❌ The concept of "salmon DNA" might feel unusual to some, though it's highly effective and dermatologist-backed.
Final Verdict
This isn't a quick-fix product, but if you stick with it, the reward is skin that looks plumper, healthier, and more resilient. It’s like sending your skin into a repair shop. Best for anyone who has hit a plateau with their current anti-aging routine or who wants to actively strengthen their skin's foundation.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Good
Color: PDRN 25%
Works well
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Reviewed in the United States on May 29, 2026
★★★★★ 3
It's okay.
Color: PDRN 25%
I'm not going to say it's good I'm not going to say it's bad, I do not like the sticky feeling you have to wash your hands afterwards. And it feels sticky on your face for a while I used it about 10 minutes after microneedling my face. It did help my face feel better kind of calm it down a little bit. When I applied it it didn't burn or nothing
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Great product
Color: PDRN 25%
Game changing product. It makes less expensive stuff feel like luxury. I love it.
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Reviewed in the United States on April 5, 2026