【 Weak current College 】 on speaker series and parallel issue summary

<br> <br> <br> Speaker series and parallel problems <br> Audio speaker can be inline or in parallel. Can also be concatenated in parallel. Speaker series and parallel to get desired impedance and power output. First talk about the theory .. <br> <br> First of all let's junior secondary resistance series-parallel connection problems <br> <br> Series: R = R1 + R2 + ... ... Rn. .<br> <br> Parallel connection: 1/1/R = R1 + R2 + 1/1/Rn ... <br> <br> In the speaker series or in parallel, we require the use of power, impedance, .preferably the same brand and model of the speaker. Therefore, the above formula for simplifying <br> <br> Series: R = NR1 <br> <br> Parallel: R = R1 / N <br> <br> Note: the .above formula R represents the total impedance, R1 represents a single speaker impedance, N represents the number of speakers <br> <br> In the speaker series or parallel connection, typically we are two sets of two. So for example when the two speakers .series, the total impedance equal to a single speaker impedance multiplied by 2, and when the two speakers in parallel, the total impedance equal to a single speaker impedance divided by number of speakers, Ali grasp audio world <br> <br> The speaker's .power consumption? <br> <br> According to the power equation P = U2 / R <br> <br> First-line, because the speaker power rating will not change, so the two speakers series power rating after a single speaker rated .power multiplied by 2. Speaker series after power consumption does not increase, but will decrease. This is because the two speakers of the same impedance, therefore they halved power amplifier output voltage, that is: <br> <br> Single speaker power P1 .= (U / 2) <br> <br> 2 / R, that is in-line after each speaker only consume a series preceding 1 / 4 power, two-line speaker after the total power consumption of only a single non-line .sound half the power consumption. Therefore, the sound will be smaller, but it also shows the speaker series after the Group has significant power potential. <br> <br> Look at the situation of parallel <br> <br> Because the two .speakers is parallel, role in the two speakers of the voltage does not change and is the same, so a single speaker power consumption, total power consumption is equal to a single speaker power multiplied by 2 - on your amplifier is a test. The reality .of the most common is the speaker of the parallel <br> <br> Then the series and parallel situation and how? <br> <br> Four speaker after the first series of parallel, with a total rated capacity (P1 + P1) .x2, can also be understood to four speakers the sum of the rated power. <br> <br> Because the two speaker series and parallel, each speaker is still only on a voltage of 1 / 2, so the four speakers actual power consumption .of only its rated power 1 / 4, to truly promote the 4 speaker after the first string and the speaker group, comprising not only need power amplifier and audio Group's overall impedance matching, and power amplifier also need large current output. <br> < .br> In theory, a power amplifier rated for, 400W (4 Ω), four speakers, rated power 100W (4 Ω). This first series of four speakers, the total impedance after and remains 4 Ω, and their total rated power can .reach 400W (4 Ω) <br> <br> From the impedance matching degree, speakers in parallel or serial-parallel can save power amplifier, save money. But if back to Earth, the theory is not necessarily work. Because live sound reinforcement .is not to do various tests of sound box. The best should be guided by the manufacturer's instructions. <br> <br> In General, our most popular is the speaker's parallel, but be aware that while some power amplifier on the surface, you .can parallel impedance after work, but might have been like, we have to understand the power amplifier current output capacity can only be used, otherwise it might burn-amplifier and speaker system. For example, a power amplifier, 8-Ohm impedance as the .amplifier average maximum output voltage 100V, maximum output current 12A, equivalent to 1200w power output. If the second only parallel loudspeaker system, impedance 4 ohm, drop amplifiers should provide twice the current (24A). But this is not possible because the current exceeded .its limit. <br> <br> Some amplifier "load matching system", for example, LAB.GRUPPEN <br> <br> MLSTM technology of, if you find that you cannot provide such strong currents from 100VX12A mode, convert 80VX15A or .55VX22A mode. This way you can continue to work. <br> <br> Speakers not just in-line, are using a serial-parallel fashion, speakers number, string into 16 euro and then into 8 Europe or even 2 ou 4 euro ., many speakers, power increases, your power amplifier power is also increased. Small power speaker with the model cases is that the "principle" of the connection, speakers of different models of high power and not desirable. In serial circuit, if two speaker .impedance deviation (there are no two identical speaker impedance), impedance of a relative power is greater than the impedance of a slightly smaller. And threaded and does next, once the threaded unit appear burned down, or voice coil shorted, rear speakers may also .be compromised. <br> <br> It can therefore be said that the speakers in parallel or series and parallel combinations matching speaker system stability and reliability is poor, when debugging a very careful to be little to fine-tune and avoid lavishly. < .br> <br> Of course, if you come across a bunch of speakers and unmatched power amplifier, be sure to match your own combinations, we should carefully calculated. double-check. Combination before confirm each amplifier's rated power and impedance; as well .as every speaker's rated power and impedance. Second, to strict observance of loudspeaker and amplifier of matching patterns. Example: two 8-Europe, 350W of box, parallel impedance becomes after 4 euro, total power available for 700W, 4 ohm 1000 Watt amplifier .. AlsoFor example, there are 8 only 100W8 Europe speaker, an 800-Watt per channel power amplifier (4 euro) per Channel 4 only after the first bunch of speakers and connections. <br> <br> Personal opinion: preferably as large as .the resistance value is, the power amplifier power is the speaker 1.5 times; impedance is really engaging unevensituation speaker impedance must never be allowed than the impedance of the amplifier, speaker impedance than the impedance of the amplifier is slightly larger, but the difference is not .more than 4 Ohms. <br> <br> Generally speaking, the built-in crossover series of speakers cannot, otherwise you may receive the following series: positive side speakers than normal, but negative side speaker frequency weak below are end speakers, down .hour, will feel the positive side of the speaker is greater than the negative side of the speaker volume. Professional external electronic crossover way crossover of speakers can be concatenated. Also keep in mind that if the speaker is not the same nominal impedance must not be .connected in parallel. <br> <br> Professional speakers in parallel in engineering is commonly used, but require the same power, preferably the same model, 8 Europe speakers can only parallel 2, 12 'box can only parallel 3, due to parallel .the resistance after less than 4 euro, the amplifier can easily be increased protection, heat, and sound quality is very noisy, because of the amplifier circuit is mostly by 4-16-European values. <br> <br> The world of some .imported sound frequency and high frequency lots of all-is the 16 European. this condition you have depending on the Qing Qing Kuang., general statement of the manufacturer will have professional guidance. <br> <br> Ohm's law, the current in the .conductor with its both sides voltage proportional to its resistance inversely. This is the Ohm's law. I used that current through the conductor, U said conductor both sides voltage, r = conductor resistance, Ohm's law can be written into the formula: <br> .<br> I = U / R. .Power calculation formula: P = UI; P = U2 / R; P = I2R <br> <br>.