What's needed for a typical Sonab System 9 installation. This is just a general guide, every location has its own conditions.
4 x CLS speakers
1 x CSW subwoofer
1 x CTX transmitter
1 x CVM volume master
Preferably place the CTX transmitter as central as possible in the location. The transmitter sends the signal evenly around it.
Preferably place all wireless components on approximately the same height. This to ensure best wireless connection.
Each CLS speakers covers approximately 25-30 square meters. Depending on how high up the speakers are placed, you might need to add more CLS to get same coverage and sound pressure.