Speaker Cable Length6/6/2021
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To accept cookies from this site, please click the Allow button below. This rating, in accordance with IEC standard EN60529, classifies and rates the degree of protection provided against the intrusion of solid objects (like tools, dust or fingers) and water ingress in respect of electrical equipment enclosures. The rating usually consists of a two digit number where the first number represents the solid particle ingress protection level and the second digit represents moisture ingress protection level. Whilst some product descriptions such as waterproof, weather resistant, splashproof etc can be subjective, the IP rating gives a clear indication of the products resistance to particles and moisture. If either of the digits are unavailable, it is replaced by an x. Values range from 1 (resists impact of weights up to 150g falling from 15cm) to 9 (resists impact of weights up to 5kg falling from 40cm). SPL stands for Sound Pressure Level and it is measured in decibels for a specific wattage at a given distance, usually 1 watt at 1 metre. This gives you a simple standardised method of comparing different models according to sound output levels. The Max SPL is the sound pressure level measured at 1 metre when the speaker is operating at its maximum wattage. The inverse square law states that the sound intensity measured at a certain distance from the source will be 4 times the intensity measured at twice that distance. This has the effect of reducing the SPL by 6dB each time the distance is doubled. Bear this in mind when considering the height of any speakers as this will have a profound effect on the final volume level. RMS is derived from an equation which produces the most mathematically accurate measure of a speakers power output. The RMS value is often shown as watts RMS on the product specification. This represents the peak output measured in microseconds rather than over a long period of time. This tells you about the sound projection pattern of a speaker. Whilst the optimum sound can be heard directly in front of the speaker (on axis) the dispersion value can tell you how audible certain frequencies are off-axis. These are designed in such a way that the sound is projected a long distance at the cost of horizontal dispersion. Using a microphone with a cardioid or a hypercardioid pick-up pattern will reduce feedback as the sound from behind the microphone is rejected. This is ideal for studio recordings for a natural sound, or for larger group performances such as a choir or orchestra. This provides an even narrower focus and is ideal for isolating a singers voice or particular instrument reducing competing sound from nearby and further reducing the risk of feedback.
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