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Bronze Member Username: CamarobumpPost Number: 71 Registered: Sep-06 | My subs are dual 4 ohms, and the box also says that they are 2 or 8 ohms operation. What does that mean? |
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Gold Member Username: James1115Use a simple... Post Number: 8576 Registered: Dec-04 | that means that each sub can be wired to a 2 ohm load (parrellel/parellel) or a 8 ohm load(series/parellel). Now you have two subs so if you wire each to a two ohm load and then wire that parellel again it would bring you to a 1 ohm load, or if you wire them both to a 8ohm load series and then parellel again it becomes a 4 ohm load. Or you can wire them each parellel to a 2 ohm load and run them stereo on your amp to 2 seperate channels at 2ohms/piece depending on the stability of your amp. Ohm: As said earlier, the ohm is the unit of measure of a device's opposition to the flow of current. One ohm of resistance will allow only one amp of current to flow through a circuit when one volt of electrical force is applied to the circuit. If I am redundant in some of the definitions, it is to help to make things clearer. All power sources are designed to operate into some sort of a load. Power supplies are generally designed to maintain a given voltage into some given load. Let's say we have a 12 volt power supply that's designed to deliver 1 amp of current. If we connect a load that has a resistance of 24 ohms, this will allow 1/2 of the power supply's max current to flow through the load. If we connect a second 24 ohm load across the power supply's output terminals, the power supply will be delivering the maximum safe current output possible without damaging the supply. If we connect a third load across the supply, the output current will be 1.5 times as much as the supply can safely deliver (assuming that the supply can maintain it's rated voltage under the heavy load) and the supply will soon blow a fuse or fail. The same thing happens when you connect too low of an ohm load to an amplifier. Lower ohm loads can allow the amplifier to produce more output current (which results in more output power but too low of an ohm load will cause the amplifier to fail. The amplifier expects to 'see' a certain minimum resistance (ohms) to assure a limited maximum current flow at maximum output. Since this is a site is supposed to explain car audio. Lets say we have a 100 watt amplifier and it can drive a minimum ohm load of 4 ohms. This means that it can produce 100 watts into a 4 ohm load and any lower ohm load will cause the amplifier to fail. To produce 100 watts, the amplifier will have to deliver 5 amps of current. To produce a current flow of 5 amps into a 4 ohm load, it will have to develop 20 volts across the load (the voltage at the speaker terminals at full power will be 20 volts). Go to www.bcae1.com and read up on ohms and check out the rest of the site you will learn a lot. |