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When you talk about whether an audio loudspeaker is 4 ohm or 8 ohm, you're referring to the speaker's impedance, an electrical property similar to resistance. Speakers come in several different impedance ratings; matching the impedance of your speakers to your amplifier ensures that your audio system will run efficiently and sound its best. About Impedance Like resistance, impedance is a restriction of the flow of electrical current in a circuit. Resistance and impedance are similar, although impedance changes for different audio frequencies and resistance is generally constant. Impedance comes from the interaction of the speaker's voice coil and other electronic...

Series vs. Parallel Connection Unfortunately, getting it right goes beyond the speakers you choose: You also have to wire them correctly. There are two ways you can connect multiple speakers on the same circuit, in parallel or in series. Connecting them in parallel means running the wire from the positive terminal of one speaker to the positive terminal of the next, and the same with the negative terminals. When you do that each speaker cuts the impedance in half, so two 4-ohm speakers only give 2 ohms impedance. Connecting them in series means running speaker wire from the positive terminal of...

70V systems are typically used for installations that require large amounts of speakers to be installed. The 70V transformer on each speaker allows you to have multiple lines of speakers connected to a single amplifier without the need to worry about impedance issues as you would get with an 8 ohm system. So generally, we use 70V distributed systems when we have a large scale venue such as a shopping mall that requires coverage throughout the facility. We would install an 8 ohm system where high end performance is required, in venues such as a churches or amphitheaters, where we...

In the car audio and consumer electronics world, you hear a lot about watts, power output and power handling. Companies constantly advertise that their speakers can handle 200 watts or that their amplifier puts out 1,000+ watts. Most people generally shop for amplifiers and speakers simply by looking at which one has the highest power rating, because everybody has heard "the higher the watts, the louder the sound."  But if you take a closer look at the products when shopping around, you'll notice that some manufacturers rate their products' power capabilities with "peak" watts, and some use "RMS" watts. Many...

What’s the Difference Between RMS and Peak Watts? Jan 17th, 2020 Root mean square (RMS) and peak power ratings are basic power-handling terms. If you’re looking to build a high-performance entertainment system, you should understand exactly what they represent. David M. Foster This article is part of the Power Management Series: What’s the Difference Between Watts, RMS, and More? In the consumer electronics world, you will often hear about watts, power handling, and power output.The terms are used interchangeably to refer to two values, that is, root mean square (RMS) and peak power rating. Power rating is among the essential factors that contribute...