I don´t know about Kuoppala, but this is what Alexi uses:
Electronics: Jackson JE-1000
Pickups: Jackson j-50bc humbucker.
Preamp: Perfect Connection with gp-1000 tubes
Effects: Rocktron Intellifex
Power Amp: Engl 2 x 50watt tube power amp (He used to have a Rocktron power amp)
Cabinet: Marshall JCM-900 4 x 12" (He may be changing this to an Engl cabinet)