BOSS CH1 Super Chorus Modifications
The BOSS CH1 is part of the BOSS compact series and was released in May 1989 as an analog chorus pedal. Modern versions of the pedal (since 2001) use a digital method of producing the chorus effect. The modifications provided here apply only to the analog version of the CH1 (see below to find out how to tell the difference):
- Rate Expansion Mod
- Vibrato Mod
I also provide the following mods for most BOSS compact series pedals, including the BOSS CH1:
- First On Mod or First Off Mod
BOSS CH1 Mods
Rate Expansion Mod
The Rate Expansion Mod for the BOSS CH1 expands the available range for the speed of the LFO. Mainly, it allows you to access slower LFO speeds compared to the stock minimum speed.
Vibrato Mod
The Vibrato Mod for the BOSS CH1 gives you the ability to switch between Chorus and Vibrato modes. The toggle switch is installed on the top face between the Rate and Depth knobs.
General BOSS Mods
First On/Off Mod
Sometimes, after plugging in a BOSS pedal it defaults to an ON or OFF state. This may be undesireable behavior, and on some BOSS compact pedals it is possible to reverse the “start-up” state of the pedal.
The First On/Off mod takes the stock start-up state and flips it. If the pedal currently starts up in the ON state, then the mod switches that to start up in the OFF state. Likewise, if the pedal currently starts up in the OFF state, then the mod switches it to start up in the ON state.
BOSS CH1 Analog vs. Digital
You can figure out which version your CH1 is by unscrewing the backplate and checking whether the circuit board matches the following photo:
Got Questions? I Got Answers!
Hopefully I covered everything, but if you have any questions on the mods above feel free to contact me using this contact form!
If the mods above aren’t what you’re looking for, you can always request a custom modification through the Custom Guitar Pedal Modification Request form.
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