Only use a regular +9V DC Adapter (Negative center). Do not use a different adapter (12V/18V) as it will void any warranty. The Les Boutiques effect consists of 3 separate pedals that can be individually switched and also have their own switching options. Be warned that turning all 3 effects to maximum gain may result in it squealing like a pig depending on how clean your DC adapter is (it will at best amplify all the noise in your signal chain for a hissing extravaganza).
Basic Settings Royal Tone This is the lowest driving Overdrive of the 3 and is on the Green channel. Volume, Drive and Tone are the same as in other pedals. Presence can create some top end sparkle. Headroom The Headroom switch (+9V/+18V) gives the effect, at 18V, a longer breath before overdriving the signal.
In the Les Boutiques effect the pot is split into separate Gain and Blend. You can now determine in every Gain setting how much of the clean signal you want to let bleed through.
Merlin This is best used as a Mid to High Gain overdrive and is on the channel. Volume, Gain, Treble and Bass are the same as in other pedals although Treble may work in a reverse order than you would expect. Headroom The Headroom switch (+9V/+18V) gives the effect, at 18V, a longer breath before overdriving the signal.
Advanced Settings Besides external pots and switching options as described in the Basic settings, you can open the lid by unscrewing the 6 screws, to reveal extra DIP switching options. These settings are for advanced users who like to tweak the pedal a bit more. A DIP switch has 2 positions.
Order switching If your version of the Les Boutiques comes with order switching, you can set the order of the effects chain by putting the switches on the footswitch PCB as follows: 1-2-3: Guitar -> Royal tone -> Horse Majeur -> Merlin -> Amp 3-2-1: Guitar ->...