50W 1150-1620MHz wideband GPS L1 L2 L3 RF High Power Amplifier For JammerQQCHINAPA 2-channel amplifier AB design special cooling system Power amplier 750W Public Address AmplifierDivider Dual 10/12/15/18 inch Two Low One High Power Two Divider Stage Sound Performance 1500 1800 2500wTDA2030A ...