- It depends if you are using subwoofers with them, like I do. CLSs need subwoofers. I am using right now two Velodynes HGS 18 with the crossover set at 120Hz. The HGS 18s are lightning fast and their crossover is very clean (I could never use the crossover of the now discontinued ULD18s, for example), cleaner than the crossover of the old Muse 18s, best subwoofers of the 90s, but too slow for the CLSs.
- I am using a 60watt Pass Aleph 5 amp to drive my CLSIIZs. Without a sub or two you may want a more powerful amp to drive the CLSs.
GF.