View Contact Call Seller Now. Bosch has also developed the Simulated Acoustical Feedback Exposure SAFE test to demonstrate that they can withstand two times their rated power for short durations. This item is noncancelable and nonreturnable. A 2 m four-core cable is fitted to the horns. Enter new zip code to refresh estimated delivery time. All four models are for direct connection lc a V line output and are finished in light grey RAL Special Order Update Location close.