The resonators from French manufacturer Acoustic Systems are small but powerful tools for room tuning, noise reduction and minimizing air turbulences. Many positive reviews can be found on the internet.

This offering is for a full set of 8 resonators, 1 copper, 4 silver and 3 gold resonators. Newprices are: 280 euro for the copper version, 380 euro or the silver version and 1.200 euro for the gold version. Now the full set of 8 tuning devices is available for 1.750 euro.