Crack uses a 6"x10" chassis panel. The old Seduction and Quickie kits used this as did the very first SEX amp, Paramour and Foreplay kits from the 90s. Also The Fix and Submissive. Probably some others I am forgetting.
Moreplay uses an 8x10 panel, as does the S.E.X. amp. As will the new subwoofer amp.
Eros 8x12
Stereomour2 10x12
Mainline 12x12
BeePre2 and Kaiju are 10x16