hi this is noor i wnt know the procedure and precations errection for PRESSURE AND DP transmitters? how to take impusle line for level and flow?(water and steam) impulse line sizes? and type of material ? plz give me answer / reffer any website ? to me mail2noor.hyd@gmail.com. 1 Answers.
A specialized speaker, referred to as a subwoofer, is responsible for that deep bass experience. 1  The subwoofer is designed only to reproduce the lowest of audible frequencies. In home theater, this is often referred to as LFE (Low Frequency Effects.
Because the amplifier is an active electronic device, it needs power, and so you have to put any active speakers near a power outlet. For most audio systems, the subwoofer is probably going to be your only active speaker (though you can also find passive subwoofers, and some high-end audio systems use these). Thereâs no practical reason for any of your other speakers to be active.