Complex sentence: A 10-speaker sound system and equalizer + amp was a common option with the Turbo S and S/SE prototypes, only the earlier 1986,250 bhp prototypes featured a sonderwunchprogram or special wishes custom interior options package.
Split into simpler sentences: A 10-speaker sound system and equalizer + amp was a common option with the Turbo S and S/SE prototypes. Only the earlier 1986,250 bhp prototypes featured a sonderwunchprogram or special wishes custom interior options package.