The speaker system needs to reproduce various music programs with high quality. According to the properties of the music signal, the peak factor is about 10-15DB. From the perspective of ensuring sound quality, the power amplifier should not have any clipping in this dynamic range. , That is, the maximum output power of the power amplifier should be 5-8 times the rated power of the speaker. Although the sound quality of such a power configuration is very good, his investment will be large, so this power ratio is generally set at 1-2 times the speaker The power rating of the unit.
The following is the configuration experience in general audio engineering
1. In some projects with low requirements and limited investment, the power of the power amplifier is at least equivalent to the rated power of the speaker. But be very careful to keep the sound undistorted. A power configuration that is too small does not seem to damage the speaker unit, but it is not. Too small power is extremely prone to overload clipping, which generates a lot of harmonics and burns the tweeter.
2. The power recommended by the general project is 1.5 times. The bass part is better than 1.5 times, so as to obtain a sufficient sense of power.
3. The most demanding venues, such as recording studios *, concert halls, etc., are ideally twice the power of the speakers. (This is consistent with one of the recommended values ​​of the mating standard developed by the International Electrotechnical Commission IEC).
In short, there is no hard standard for the design of power amplifier power, which depends entirely on the investment budget and the requirements for sound quality.
Global Lithium-ion Battery Market: Bifurcation
- Based on product, the lithium ion battery market has been categorized into cells/ modules, battery packs, and energy storage systems (ESS).
- On the basis of end-user industry, the global lithium ion battery market is bifurcated into consumer electronics, automotive, and grid energy & industrial.
- In terms of region, the report classifies the market into North America, Europe, Asia Pacific, Middle East & Africa (MEA), and South America. Regions have been analyzed in terms of value and volume shipments in the lithium ion battery market industry. Moreover, region-wise prominent countries covered in the report include the U.S, Canada, Germany, the U.K., France, China, Japan, South Korea, South Africa, GCC, and Brazil.
Global Lithium-ion Battery Market: Rules & Regulations
- As lithium-ion batteries are hazardous material, various regulations regarding the shipment of these batteries have been laid down. The International Air Transport Association (IATA) has set regulations regarding the shipment of lithium-ion batteries in its IATA Dangerous Goods Regulations (DGR).
- Globally, lithium-ion batteries can be shipped as individual cells or group of cells (batteries); batteries/ cell packed with a smartphone or tablet but separated from the electronic equipment and batteries/ cells contained in an equipment.
- Regulations state that, lithium-ion cells and batteries are banned from being transported as cargo or in passenger aircrafts.
- The packaging of lithium-ion batteries must be done in accordance with Packing Instruction (PI) 965. Lithium-ion batteries must be packed in accordance with Section IA or Section IB of PI 965, and must not be packed with the same outer packaging with dangerous goods classified in Class 1 (explosives).
- The packaging of lithium-ion batteries must contain the label [Cargo Aircraft Only," and marked [UN3480." The minimum packaging dimension of packing lithium-ion batteries is 120 mm wide x 110 mm high.
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