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The JAM Pedals Dyna-ssor is a compressor type pedal directly inspired by the mythical MXR Dynacomp which was one of the first in pedal format available on the market. Widely used by American musicians (country, LA and others) in the early 70s, and pioneered using an operational transconductance amplifier-based circuit; that allowed generous compression with a "squashy" attack and excellent dynamics despite having a relatively poor signal-to-noise ratio (yes, it was blowing hard!). There followed a lot of clones and improved versions like the Ross and others. The Greek brand offers us here its own version with all the qualities of the original, but without the flaws.

Externally it is a JAM Pedals, it has a hand painted finish. Each pedal will therefore be slightly different from one copy to another. The controls couldn't be simpler and more intuitive: A Level which controls the output level and a Sustain which allows you to adjust the compression/sustain rate.
Inside, we have a quality PCB which only confirms the great care that our Greek friends bring to the manufacture of these pretty, colorful pedals. On this PCB, we find the original OTA, a NOS CA3080 and selected components.

Connected to a very dynamic clean channel, the Dyna-ssor proves to be a very transparent compressor, while retaining this characteristic color. In a nutshell, it's kinder to your signal. Sustain button at zero, it is totally transparent, which is really rare for a "guitar" compressor. Unlike the original, it does not blow, but really not (that too is rare). It offers a nice dynamic with progressive compression and it's characteristic very "squashy" attack. It can be used as a classic compressor as well as a boost. If you're a fan of sounds like Landau, Lukather, Mike Thompson and others, you can even leave it on constantly with a setting slightly above "unity gain".

For those looking for a simple compressor with a nice 70s / 80s typed compression, this is the best. Flawless manufacturing, small footprint and affordable price. Nothing to say, it's all good!

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What they say


After a few exchanges by email, I ordered a Strymon Iridium pedal (excellent by the way) which I received 20 hours after shipping.

Google - S. Cayla
La Madeleine, France

Ordered 2 pedals! Received the pedals in one day from Paris to Austria AMAZING!!!! Kind custom service and quick answers.

Facebook - Dave Poglin
Graz, Austria

An ESP order? Guitars Rebellion is the place to go. From advice to delivery, this shop is 5/5 with your eyes closed.

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Paris, France
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