How can you use multiple speakers to a home theater or stereo amplifier

Finally, it is easy, but before explaining the process I believe it is necessary to issue a warning. Multiple sets of speakers can generally not connected directly to a standard audio amplifier, without any kind of device impedance matching. In relation to these people who want the speakers in several rooms simultaneously (audio distribution could run). If multiple sets of speakers are powered from a set of speaker terminals of the amplifier is generally overheat and shutdown and the output stage can beat (see Note 1). These comments do not apply to AP style amplifier with 25 or 70 volt outputs which require special speakers with transformers.

The right solution is to use an impedance matching speaker selector with the protection enabled, or use the impedance matching in wall volume control. Note the stress in the sentence above. Since most of selectors, speakers are made with a dangerous feature: a button with your right mouse buttonbefore disabling the protection. When the switch on the back to prevent accidental switching of the protection of pregnant, it would be much better. If the protection is turned off accidentally shut down during the execution of multiple pairs of speakers to the amplifier is, can blow fuses, amplifiers, and could very well damage the output stage. There is really only 2 reasons to turn this is the more relevant that the adjustment of the impedance control volume of all thePair of speakers. The other reason it would be when running a single pair of speakers, so it does not require impedance matching. In this case, though, so that the security only a very small difference in the tone to be activated, so why not leave it on?

Remember that he him a pair of terminals (usually red and black amplifier) on. Do not use any amp amplifier at several points for a room on the middle piece on the rear surrounds Feedetc. This is due to how surround receiver delivers the sound, how can you end up only with voice in a room and music in another! The correct plug for a surround receiver, surround sound in the main hall and the sound speakers left and right clients distributed. My recommendation for connecting a surround receiver is as follows. Run selector front left and right outputs of the amplifier. Plug your front left and rightTurning to the first speaker selector speaker. you must surround system back into balance with the pink noise test as a selector, the speaker output on the left and right speakers fell by a small amount. This allows you, the keynote speaker and others on the speaker selector the game without having to connect more than others. If you have speaker selector volume control, you must make sure that when youSurround system for movies of the volume control is the same attitude that was done when testing the pink noise. You can catch the selector speaker of the 'b' button Speaker of the device, is the balance between volume and the main left and right front speakers and the rest of the Senate, no problem.

Another variant is an amplifier with speaker output for zone 2, 3, etc. are set up to 1 pair of speaker drive, and should be used withImpedance matching pairs, where other uses. The output of the region, and so allow a second (or third) source, such as CD and radio in a room in another.

An impedance matching speaker selector provides multiple outputs from one input, and protects the amplifier from damage. Speaker Selectors are with 4-12 outputs. As long as your amplifier is powerful enough to push you so many groups of speakers you want. Simply connect the speaker switch on your 'A' (or 'B')Outputs and the rest of the speaker on the speaker selector. You can buy speaker selectors with volume control for each speaker. Another option is the wall impedance matching volume of orders not to require that a selector speaker. Most of them have jumper defined during installation and provides a good match. If you want to run some speakers, the speakers or volume control selectors are (usually max 12 pairs made.) depending on the hardware, you probably need to carry out a second amplifier to the second set of volume control (or speaker selector) from.

So, what is the impedance and impedance matching? (Warning: semi-technical material to come)

The signal of the music on the speakers is as AC (or AC), because it varies the polarity and voltage. This is in connection with a battery, for example, which generates a constant or DC. You can current image as the amount of waterflowing through a pipe (wire) and the tension that the water pressure. The AC can be used as a stream, rotates the direction and runs like a constant flow think in one direction. The analogy is not exact, but close enough to get a picture of what happens to. Standard house current U.S. reverses direction (polarity) in an interval (or frequency) of 60 times per second, measures up to 60 Hz (Hertz). When you visit our site you can see this book with explanatory graphicsincluded.

Your speakers on a certain resistance to flow. Imagine the resistance as a constriction in the pipe, which restricts the flow. They have a DC resistance is named as the coil resistance and resistance to the AC impedance. Resistance and impedance values measured in ohms. Impedance is a complex sum of the current resistance will cause more resistance to various frequencies of AC capacitance and inductance) (normal properties of electrical and electronic equipment. Itis usually for the players that the impedance and is given reference to certain frequencies. But imagine, just as the AC resistance for practical purposes. It is usually rated at 8 or 4 ohms. Most home amplifiers prefer an impedance of 8 ohms. Every time when another speaker in parallel the impedance is reduced added. Other pipes together in order) connected the same pump, the pump appears to increase (the capacity of the pump limit. TheAmplifier is the pump. Two 8 ohm speakers reduce the impedance of 4 ohms, four 8 ohm speakers reduce the impedance of 2 ohms, and so on.

An amplifier is waiting (need) some resistance to current flow. The greater the impedance the more current in the output stage of a typical amplifier. This is usually directly by a transistor (or other amplification device) and damage to the transistor or protection resistors in the power amplifier. If you're lucky, thatonly a power amp fuse blows. The moral of this story is always an impedance matching speaker selector (or control volume) and your amplifier will be used over a load impedance seen safe.

1 (Reference)

Why the sudden exit of the amplifier stage? This is due to the nature of a typical amplifier. It must first be clear that the amplifier is not really the input signal is greater. Instead it involves a larger copy new) (plus electricity and excitement of the original signal,and put the speakers. He made the copy of the power supply, which comes from the sector from the outlet. This tension must be first converted into direct current. If not done effectively amplifiers Hum (because he does not know) the words. The amplifier controls the voltage by a kind of valve that controls the output voltage and current. These valves (transistors are the usual channels of May, but will be integrated vacuum tubes or other devices are controlled) bythe input signal. In response to the input signal may increase the device, more or less electricity (and / or voltage) through the exit into an exact (hopefully) replica of the input signal. To the majority of the speakers are working well with an amplifier, it needs a low output impedance (see text above for a discussion) on the impedance. If the output impedance is too high, the frequency varies with the speaker impedance. This means that certain soundsAccent, and some went from the height they should be, and this effect is of a different number of different speakers. In practice this means that) with the design most common in the circuit of the transistor (or other device to be fully lit to spend it with almost all shipments is currently accessed by them. This is the hard part. The current flow is largely determined by the impedance of the connected speakers. Most amplifiers are designed to operate with 8 ohmsSpeakers at 4 ohms and can work reasonably well. Some so-called high power amplifiers May good results in 1 ohm. In other words, the amplifiers designed so that if the output transistors are over the full current and voltage transducers, they can take to work them into an expected value of the impedance. If the impedance (AC resistance) of the connected speakers is too low, more electricity is now through the device gain, it can take a pass. It on fire, or blows a fuse orResistance transmitter, or other type of damage. Fusing often do not respond quickly enough to save the route. So, why not all systems operate at low impedance design? Without dipping too far into it, which can lead to enormous cost increases. For example, for the theoretically ideal performance in most speaker systems today, an amplifier should double its power for each halving of impedance. So for 100 watts into 8 ohms, it should make 200 in 4 ohms, 400 into 2 ohms, and800 in one ohm (for the record that it is theoretically ideal and practically no amplifiers to achieve a doubling of the effective power for a halving of impedance load). Most decent amplifiers today are far less than, 5 ohms to the speakers, the drops can behave low impedances to certain frequencies. Our theoretical amps, if it should work out on OHM .5 A disable the ability to have 1600 watts per channel, without damaging anything (theAMP!). As the cost of a good amp with this kind of capacity can imagine, is considerable. Now remember, you will be as follows: The average user of this massive amp with 8 ohm speakers, an average output of 100 watts RMS see (RMS means Root Mean Square, and is essentially a measure of the average power of about 70 percent of maximum power). For most users this would be the price for the amplifier to achieve. Some amplifiers are designed such standards, for the reasonThere are speakers that covered one ohm, which sound much better when a high current amplifier driven. An example is the Krell Evolution One, which is a monoblock. This means that you need two for stereo. They cost about $ 25,000 dollars. For those who might believe that I'm doing on this finding, the use of Google to the prices on Krell monoblocks.

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