Why don’t you go for something “neutral”, like a PA? Otherwise the effects (from the spark, if you use them) will not sound the same as via monitoring headphones, for example.
I did this with my JBL EON 710 and got a very good tone out of it:
- Measure with REW
- Create EQ (you can even use a “House curve”, like harman Kardon etc.)
- Modify EQ to 8 parms
- Upload into the EON DSP using the app:
Now it sounds (almost) perfect, taking into account the speaker, the room and my listening position…