Hi Laurent, thanks for the message….. but I’m afraid it’s not possible to upgrade a standard P38 into a P38EX… the printed circuit layout is completely different to accomodate the changes. There are additional buffer amplifiers and components to allow the sidechain access, and modifications to the output stage to achieve the by-pass mixing.
But, don’t forget that as you already have a P38, I can let you have a very good ‘trade-in’ allowance for a new P38EX.
Please email me direct on [email protected] letting me know when you bought the P38 and where from, and It’s likely I can make you an offer you can’t refuse! 