2 10's - hole size does not matter sounds same with armrest up/down,
all quartz mids/highs - 6.5 mb in doors, 6.5 mid & tweet in kick, tweet in A pilar, and 8 mid/tweet in rear deck, these were existing speakers, we just rewired, used correct crossovers and sound deadened and remounted.
These amps are new to use they are called Twister, there are a budget level amp for STEG, so far they work perfectly, 6 channel mid/highs and mono for subs
I will admitt this was probably the most complicated box i ever built, the compound angles and extreme tight tolerences for fit and finish, reinforced for the 3/4 plexi window, inside box light with red neon.