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Description
c4 synth pedal Source Audio C4 Synth – Guitars RebellionSource Audio's One Series range covers all the needs of today's guitar and bass players. The range had previously benefited from a good number of effects, it just lacked a machine dedicated to the more adventurous and creative among you. It's done with the C4 Synth. Inside this very attractive case in brushed aluminum with a shimmering color, hides a real sound factory that will be able to satisfy guitarists and musicians who are fans of Eurorack and
Source Audio's One Series range covers all the needs of today's guitar and bass players. The range had previously benefited from a good number of effects, it just lacked a machine dedicated to the more adventurous and creative among you. It's done with the C4 Synth. Inside this very attractive case in brushed aluminum with a shimmering color, hides a real sound factory that will be able to satisfy guitarists and musicians who are fans of Eurorack and other synthesizers.Source Audio uses the same platform set up with the Nemesis, the Ventris and others… to create this superb and overpowered machine capable of delivering a very large collection of sounds from the best modular synths and much more.
The assembly is perfect, the compact format and the handling very intuitive. Inside, there are high quality PCBs. At Source Audio it's not joking, the brand wants to be at the forefront of audio technologies, the architecture used offering computing power and processing quality that very few brands benefit from.
The C4 Synth is the most powerful stereo effect pedal dedicated to modular sounds on the market. Drawing on nearly 15 years of effects pedal technology and know-how, the C4 Synth is the best way to easily integrate these sounds into rigs of all types. The main difference with other pedals of its kind? His ability to follow your phrasing without ever dropping out. Indeed, it benefits from an ultra-fast response which is a true model of its kind.
The Source Audio C4 Synth is an all-in-one modular machine. You can play the standard 6 factory sounds, or browse the ever-growing Neuro library to find additional sounds created by Source Audio and the community. You can also amp up the power of the pedal by using the Neuro app's editing tools to create your own custom presets. The C4 will satisfy the needs of any guitarist, bassist, keyboardist and musician who loves electronic music. A relatively complex effect as it is rich in possibilities, the pedal was designed with the desire to make it as plug-and-play as possible. The pedal gives you access to the most iconic and hard to find synthesizer sounds on the market.
On the front, there are the Input and Mix functions and two Custom buttons whose functions vary according to the selected sound. You can access 3 different sounds via the mini-toggle switch and the two sound banks available. Or 6 on-board sounds, fully modifiable.
Guitar in hand, the pedal impresses with its responsiveness which is clearly unique. Whatever your speed and complexity of play, it never picks up and manages to "track" all the subtleties of your game. The effect is rich, 3D, musical and organic. It does not crush the attack and retains good transparency so as not to distort the original dynamics of your signal, with an optimized signal to noise ratio. Whichever way you tune the C4, it remains a tool of exemplary musicality. It's fluid, responsive and above all very very fun to play, whatever the source used!
In concrete terms, the Source Audio C4 Synth is an exceptional and ultra-complete pedal! It is already rich out of the box, but imagine, via the Neuro application, being able to access a huge collection of additional synths. In the program:
3 types of oscillators with different waveforms.
11 envelopes with attack and decay settings.
25 customizable filters.
14 types of LFO to control the modulation part of filters, vibratos, tremolos with many waveforms.
2 programmable sequencers (16 steps) that you can use in parallel and customize according to your wishes.
You also get extensive parametric EQ capabilities, stereo routing options, and advanced internal features.
For example, you can combine several effects (any type) in series or parallel, split the signal on each output and send each effect engine to a specific output. Nothing prevents you from having an effect on the right and another type of effect on the left. Impressive!
The C4 Synth is a true Swiss army knife for creatives. The concept is formidable, the flexibility enormous, the possibilities almost infinite via the application, and its sound signature particularly addictive. All for one of the most attractive prices!
Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.0 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Loved it
Color: Brown/Wild Duck, Size: Large, Color: Brown/Wild Duck, Size: Large
He loved it so much, he destroyed it so we ordered another.
I didn't realize that you can stick an empty water bottle inside.
Again, the first one didn't last long, but he enjoyed it
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Very fun interactive toy
Color: Brown/Wild Duck, Size: Medium
This toy is very versatile. There's no stuffing yet it's very soft so it can be used as a tug toy. It also makes for a fun fetch toy because it has a cavity to put a water bottle. It gives your dog something that crinkles and can be pierced when bitten and easily replaced with another empty bottle whenever necessary.
That is what really makes this toy the standout of all the ones offered by Best Pet imo. I don't expect this to last forever but once my pup gets bigger we'll probably get the large size for her because there's not too many all in one fetch and tug toys at an affordable price.
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Reviewed in the United States on May 15, 2026
★★★★★ 4
Great Toy, but Big Dogs Destroy the Squeakers Fast
Color: Wild Duck, Hare, Squirrel & Alligator, Size: Large
My big dogs had the squeaker torn out in no time, but my little dog absolutely loves this toy. It’s the perfect size for her, and she carries it everywhere. Durable enough for small pups, just not tough enough for heavy chewers. Still a fun toy overall!
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Reviewed in the United States on February 15, 2026
★★★★★ 5
Fun for dogs
Color: Green/Alligator, Size: Small
Smaller than I expected, but the two little dogs love it!
They love shaking it, making it squeak, tugging it against each other & chasing it when I throw it to fetch. They often sleep laying on it.
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Reviewed in the United States on May 25, 2026
★★★★★ 3
WEIRD feature - requires a water bottle
Color: Cow, Size: Large
Cute, but buyer beware. Maybe the description said this, but who would think to read for this.... You have to insert an empty bottle (like an old water bottle) for it to make the crinkle noise. There is a velcro spot at the base where you can open it and insert the water bottle for the noise factor and your dogs entertainment. I've yet to do that, but feel like my dog is gonna figure out the velcro and get the bottle out in no time. Seems like a waste of money. I could just give her an empty water bottle without the toy for free.
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Reviewed in the United States on June 9, 2026
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