AfterImage Analog Chorus
Browsing the world of chorusses shows most are similar in setup. Pre-filtering => modulated delayline => post
filtering and a mixer stage that mixes the wet with the dry level. Sonic differences lie mostly in the filtering
and the modulation waveform. When listening to chorusses one will usually listen to sonic capabilities like
"shimmering", lush-ness and other terminology that's completely true but very much in the ear of the beholder
as well. This is also the reason why some prefer chorusses that others do not like. In the end there's a
few landmarks left like the Smallclone, the Boss CE1 and CE2, The Ibanez CS9 and relatively recently the
So, which way to go?
I do like my CE2 but experienced it too "tight" in a bandsituation. All shimmering seems to disappear
into the drummers cymbals leaving the lower end only.. rather boring, sadly. Same way my CE-1's are
great but a pain in the butt because of their size and the always active gaincontrol as well as always overloading
. This left me with the tonal character of the Ibanez CS9, BC9 and the Arions as examples of the way to go.
More shimmering, leaving the tonal character intact in a bandsituation. Add a tonecontol on that wet signal and
dial in the amount of wet level higher frequency response to taste.
Other than that make the thing TB because it's easy and takes little boardspace and then... get the whole
circuit a) in thet 1590B box as well as make it easy to build and test. Since I do not believe that, when proper
thought is given on the matter, board mounted jacks, pots and switches are a problem (and make building a lot easier and therefore cheaper)
the development path was set.
In order to get all components mounted on the board all resistors and opamps are SMD, saving loads of boardspace and keeping the device a lot quiter from a noise perspective.
The result in the end is a chorus many will like.
AfterImage Tech Spec's:
- Power Supply:....... 9Vdc battery or 9 DC adapter (center negative)
- Current Consumption:.......Approx 20 mA
- Bypass:........True Bypass
- Control's:.........Rate, Depth and Tone