Brake Lights Schematic Circuit

This is a for a cars about  the break lamps. They have a subdivision of the green circuit with its own in-line 35 amp fuse supplied by the white/brown (ignition relay) circuit feeding things like heated rear window, indicators, heater fan and tach, which leaves the original green circuit fuse (2nd one up in the four-way fuse block) feeding things like reverse lights, stop lights, washers, wipers, and circuits associated with the seat belt warning lamp and time delay buzzer. This is the figure of the diagram circuit.

Subwoofer Filter Circuit

If the audio device has a bass tone quality that is less kicking, to overcome this problem is to add an active subwoofer / crossover filter so that the tone other than the low frequency will not be passed to the power amplifier and the sound coming out of the speaker will appear even more. This the figure of the schematic diagram.

Bridging Car Audio Power

The method used in creating bridge audio power in a car.

a. stereo 2 channel bridge into 1 mono channel.The first method of car power audio bridging is combining 2 channel stereo output into 1 mono output to push 1 subwoofer speaker - this is called mono bridging. This means that under normal conditions a 2 channel power is for 2 4Ω speakers. Now, after a mono power cartridge is only to push a speaker, with impedance 2Ω; this of course the power of (rms) power will double. 

Note that the fewer speaker barriers, the power amp rms will increase as well; but with a note that this is also supported by the power amplifier. For example: A 2 channel stereo power amplifier has an output specification of 2x100watt @ 4Ω, bridge mode 1x400w @ 2Ω. This means that if the power is mono cartridge, we can use double coil speakers set to 2Ω, with output power to the speaker by 400 watts. Do you have to play at 2Ω only? The answer depends on the power, if you have stability playing at 1Ω or 4Ω there will certainly be no problem.