This amp is rated at watts at 4 ohms and watts at 2 ohms. In order for us to get maximum output out this amplifier, using only one subwoofer, we would have to use either a single voice coil 2 ohm subwoofer or a dual voice coil 4 ohm subwoofer wired in parallel. If we had two subwoofers, we would need each subwoofer to be a single voice coil 4 ohm wired in parallel to the amplifier.
Parallel is when you tie two positive and negative terminals together wiring them positive to positive, negative to negative, and then wire that straight into the positive and negative terminal of the amplifier. When you wire speakers in parallel, you are cutting the impedance in half. So a dual voice coil 4 ohm subwoofer wired in parallel is now measuring a 2 ohm load: To understand Series, visualize a dual 4 ohm voice coil.
You have two terminals side by side: Positive and Negative for voice coil 1 and then Positive and Negative for voice coil 2. To series this subwoofer, you would have to connect positive from voice coil 1 to the amplifier, then connect negative from voice coil 1 to the positive of voice coil 2, and then connect negative from voice coil 2 to the amplifier. This doubles the impedance. If we do this to a dual voice coil 4 ohm subwoofer, the impedance will be 8 ohms: The problem that many people run into, is running an amplifier with the incorrect impedance.
When you bridge a 2 channel amp, you hook up left positive and right negative. You might assume you are simply wiring it as a mono amp, which in a sense you are. The important difference that is often overlooked is when you bridge an amplifier, the amp sees half the impedance at the terminal which means that 2 channel amp would see only 1 ohm. This is extremely low for a 2 channel amplifier, it would be unleashing a lot of more power than it was designed to along with very little control which would in turn cause the amplifier to heat up very quickly and shut down going into protection mode.
Over time this will damage the amplifier. For a 2 channel amp to work properly bridged, it needs to see an 8 or 4 ohm load at the terminal, this will ensure the amplifier will work properly and not overheat and shut down. If you enjoyed reading this post, please spread the love. Tweet it, like it, stumble it, or use any other social sharing weapon of choice. When wired in this manner, the overall impedance of the system drops. As more speakers are added to the parallel configuration, the lower the impedance.
Series Wiring — This is achieved by creating a single electrical current path across all the components. When multiple speakers are wired in series, the total impedance of the system increases. Any number of speakers can be inserted into the series of speakers that are wired together. If your woofers are wired incorrectly, the wire is cheap or below the recommended gauge, or one of your wires is not making full contact to the terminal a few things could happen.
A few signs of bad woofer wiring are less bass output, distortion or clipping, a burning smell which indicates burnt voice coils and potentially a blown subwoofer. Occasionally, your car amplifier could overheat or catch fire if it does not have safety features programmed into it. Some amplifiers can detect incorrect subwoofer wiring, and will go into protect mode until the problem is fixed 4 Why do I need to follow a subwoofer wiring diagram?
A proper subwoofer installation means that the power requirements between the amp and sub match, the impedance between the sub and amp are consistent, and the subwoofer is mounted in the correct box.