... Evacuation System Class D amplifier for voice alarm system, 120W to 500W per channel. DescriptionsA series classD power amplifiers have three ranges ... channel, s rated power have options of 120W, 240W, 350W & 500W.19, , Standard rack mount design in 2U height.The VA ... -D power amplifier for voice evacuation system* 120W, 240W, 350W & 500W by one, two and four channels* 19, , rack mount design ...