Eden – I-90 Bass Chorus REVIEW

Eden’s I-90 is a dedicated bass chorus. I love when pedals are created with bass in mind first, so let’s hear what this one has to offer…

Chorus on bass may take your mind towards recordings from the late 70’s and early 80’s, such as Louis Johnson’s fretless bass on Michael Jackson’s Off the Wall or Jaco Pastorius’ version of The Chicken on The Birthday Concert album. While it is indeed a great tool for creating width and sheen to fretless basses, it can be used for a lot of other things as well. Let’s get started.



eden-i90-bass-chorus-control-knobsThe I-90 has four knobs. SPEED and DEPTH are the classic chorus parameters that control the very nature of the modulation. These controls are present on any chorus pedal, but may be named differently such as Rate or Width.

Next up is the LOW CUT knob that does exactly that – takes out some of the very low end, but only of the ‘wet’ part of the signal with effect on which brings us to the last control: MIX LEVEL. This knob defines the blend between the dry and the wet signal and again this feature comes by many names and is often named Blend, Mix, FX Level or similar.

All knobs are labeled with markers from 0 – 10.



white headphone with rhythm symbol



NOTE! Please use headphones or ‘real’ speakers. You simply can’t judge low-end material on laptop, tablet or phone speakers…!

NOTE! If you are on a mobile device, please turn it to landscape mode to see the knob settings of the pedal for each audio clip.




The I-90 is a standard chorus pedal with the controls and features you would expect, but with the added LOW CUT control that is very usable for bass. You might think that this knob should just be set to 0 at all times because you don’t want to lose low end. Well, this is not the case. In general the I-90 does not mess with you low end signal, but having a dedicated control to prevent mud when the effect is engaged is great and that is the versatility of this pedal in a nutshell. It may seem like a small thing at first, but once in the field it can quickly become an invaluable tool that takes this pedal from ‘good fun’ to a ‘must-have’.

Also because of this, the versatility is greatly enhanced and you can use it with equal success in subtle as well as more obvious chorus contexts.



The build quality is high as always with Eden. It lives in the same sturdy chassis as the CaliforniWAH and the WTDI preamp/DI pedals, and I have not yet encountered any issues with either of them.

One design decision that has been criticized somewhat in the bass player communities regarding these pedals is the choice for a 15V power supply input. It is indeed an uncommon voltage and I guess Eden recognizes this as this pedal comes with its own dedicated power supply as part of the package. However, so many bass players – myself included – often like to gather all the pedals on a board and use one external, dedicated multi power supply that can feed all pedals. Usually these can feed a number of pedals with 9V plus maybe a few with either 12V or 18V. 15V is highly unusual for multi power supply boxes, which may be a showstopper to some. Personally, if I find a pedal too good to miss on the board I’ll find a solution, but of course the line is fine between ‘too good to miss’ and ‘too much of a hassle to integrate’.

I did expect this pedal to be bigger simply judging from the photos online. It’s probably the landscape design that skews the mind, as these ‘horizontal’ pedals are usually much bigger than regular vertically designed pedals. It is bigger than a standard Boss pedal, but only about a third in total footprint, so it will take up some space on your board, but not as much as you might expect.



Today (2015), you can buy a new I-90 bass Chorus for around $150, which is more than a Boss or TC pedal but less than dedicated bass chorus pedals from e.g. Tech 21 and Aguilar. Good value without being mind-bogglingly low or high.



Without the LOW CUT feature, this pedal would have been right in the middle of the road, but at the end of the day I give it a total score of 78.6.



Pleasant fundamental sound

Very solid

Power supply included



15V power input












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