{"product_id":"jbl-prx415m","title":"JBL PRX415M","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cdiv id=\"overview\"\u003e PRX415M is a portable, fifteen-\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Inch:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A unit of linear measure equal to one twelfth of a foot (2.54 cm).\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003einch\u003c\/span\u003e, \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Two-Way:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A type of speaker system composed of two ranges of speakers, usually a woofer and tweeter.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003etwo-way\u003c\/span\u003e \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Speaker:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A loudspeaker (or \" speaker is an electroacoustic transducer that converts electrical signal into sound. the pulses in accordance with variations of and causes sound waves to propagate through a medium such as air or water.\u003e\u003cbr\u003eLoudspeakers (and other electroacoustic transducers) are the most variable elements in a modern audio system and are usually responsible for most distortion and audible differences when comparing sound systems.] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u0026gt;speaker\u003c\/span\u003e system designed for either main \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Sound Reinforcement:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience. In some situations, a sound reinforcement system is also used to enhance the sound of the sources on the stage, as opposed to simply amplifying the sources unaltered. A sound reinforcement system may be very complex, including hundreds of microphones, complex mixing and signal processing systems, tens of thousands of watts of amplification, and multiple loudspeaker arrays, all overseen by a team of audio engineers and technicians. On the other hand, a sound reinforcement system can be as simple as a small PA system in a coffeehouse, consisting of a single microphone connected to a self-powered 100-watt loudspeaker system. In both cases, these systems reinforce sound to make it louder or distribute it to a wider audience.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003e\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Sound:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Sound is a travelling wave which is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003esound\u003c\/span\u003e reinforcement\u003c\/span\u003e or monitoring applications. \u003c\/div\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cdiv id=\"features\"\u003e \u003cul class=\"list\"\u003e \u003cli\u003e 90 x 50 coverage \u003c\/li\u003e \u003cli\u003e Dual-angle pole socket for applications requiring tripod mounting \u003c\/li\u003e \u003cli\u003e Heavy Duty 16 gauge protective screen backed steel grille \u003c\/li\u003e \u003cli\u003e Tough DuraFlex \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Enclosure:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A box that contains the driver(s).\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eenclosure\u003c\/span\u003e finish \u003c\/li\u003e \u003cli\u003e SonicGuard protects the highfrequency \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Driver:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A speaker driver is an individual transducer that converts electrical energy to sound waves, typically as part of a loudspeaker, television, or other electronics device. Sometimes the transducer is itself referred to as a speaker, particularly when a single one is mounted in an enclosure or as surface-mounted device (as in a wall-mounted speaker, car audio speaker, and so on). There are many different types of speaker drivers. The most common ones are the woofer, mid-range and tweeter, as well as subwoofers which are becoming very common. Less common types of speaker drivers are supertweeters and rotary woofers, a new technology that is still proprietary of Eminent Technology.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003edriver\u003c\/span\u003e from excess \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Power:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The rate at which electrical energy is applied to or taken from a device. It is expressed in terms of watts, milliwatts or microwatts.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003epower\u003c\/span\u003e without interrupting the performance. \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cdiv id=\"specifications\"\u003e \u003cul class=\"list\"\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003e\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Frequency Range:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The actual range or span of frequencies from low to high that a unit can pass or reproduce. In terms of audio recording studios, this is usually limited to the range of 20 Hz to 20,000 Hz, which represents the full range of human hearing.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003e\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Frequency:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The number of times a periodic waveform cycles, or repeats, over a period of time.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eFrequency\u003c\/span\u003e Range\u003c\/span\u003e (-10 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; dB:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Since it expresses a ratio of two (same unit) quantities, it is a dimensionless unit. A decibel is one tenth of a bel (B).We perceive loudness of sound as the logarithm of the actual sound intensity, and dB (decibels) are a logarithmic scale.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003edB\u003c\/span\u003e) \u003c\/span\u003e: 55 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Hz:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A unit of measure of the frequency of a vibrating object, such as a guitar string, speaker cone or electrical signal. Equivalent to cycles per second, it is named for Heinrich Hertz and abbreviated \" hz.\u003e] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u0026gt;Hz\u003c\/span\u003e - 19 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; kHz:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Kilohertz, 1,000 Hertz, or one thousand cycles per second.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003ekHz\u003c\/span\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003e\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Frequency Response:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;(Example, 30-20,000 Hz) Describes the audible range of frequencies that an audio system will reproduce. (Note: All else being equal, the lower the low number, the better the bass response and the higher the high number, the better the treble response.)\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003e\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Frequency Response:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The actual range or span of frequencies from low to high that a unit can pass or reproduce. In terms of audio recording studios, this is usually limited to the range of 20 Hz to 20,000 Hz, which represents the full range of human hearing.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003e\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Frequency:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The number of times a periodic waveform cycles, or repeats, over a period of time.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eFrequency\u003c\/span\u003e Response\u003c\/span\u003e\u003c\/span\u003e (+3 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; dB:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Since it expresses a ratio of two (same unit) quantities, it is a dimensionless unit. A decibel is one tenth of a bel (B).We perceive loudness of sound as the logarithm of the actual sound intensity, and dB (decibels) are a logarithmic scale.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003edB\u003c\/span\u003e) \u003c\/span\u003e: 66 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Hz:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A unit of measure of the frequency of a vibrating object, such as a guitar string, speaker cone or electrical signal. Equivalent to cycles per second, it is named for Heinrich Hertz and abbreviated \" hz.\u003e] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u0026gt;Hz\u003c\/span\u003e - 16 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; kHz:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Kilohertz, 1,000 Hertz, or one thousand cycles per second.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003ekHz\u003c\/span\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003eCoverage Pattern \u003c\/span\u003e: 90 x 50 nominal \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003eSystem \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Sensitivity:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A measure of the relative efficiency of a speaker or loudspeaker system, often expressed as the number of decibels the unit will produce fed from a 1-watt signal measured at a distance of one meter.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eSensitivity\u003c\/span\u003e \u003c\/span\u003e: 98 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; dB:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Since it expresses a ratio of two (same unit) quantities, it is a dimensionless unit. A decibel is one tenth of a bel (B).We perceive loudness of sound as the logarithm of the actual sound intensity, and dB (decibels) are a logarithmic scale.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003edB\u003c\/span\u003e \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; SPL:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Sound pressure is the local pressure deviation from the ambient (average, or equilibrium) pressure caused by a sound wave. Sound pressure can be measured using a microphone in air and a hydrophone in water. The SI unit for sound pressure is the pascal (symbol: Pa). The instantaneous sound pressure is the deviation from the local ambient pressure p0 caused by a sound wave at a given location and given instant in time. The effective sound pressure is the root mean square of the instantaneous sound pressure over a given interval of time (or space). In a sound wave, the complementary variable to sound pressure is the acoustic particle velocity. For small amplitudes, sound pressure and particle velocity are linearly related and their ratio is the acoustic impedance. The acoustic impedance depends on both the characteristics of the wave and the medium. The local instantaneous sound intensity is the product of the sound pressure and the acoustic particle velocity and is, therefore, a vector quantity.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eSPL\u003c\/span\u003e (1w@1m) \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003e\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Power:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The rate at which electrical energy is applied to or taken from a device. It is expressed in terms of watts, milliwatts or microwatts.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003ePower\u003c\/span\u003e Rating, \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Pink Noise:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;A test signal comprising random noise that has been shaped to provide equal intensities of sound in each octave band. Pink noise is used for test signals because its spectral balance closely compensates for the frequency sensitivity of the human ear.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003ePink \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Noise:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;In sound production, noise can be classified as hum, buzz or hiss, crosstalk or digital hash.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eNoise\u003c\/span\u003e\u003c\/span\u003e \u003c\/span\u003e: 300 W \/ 600 W \/ 1200 W \u003c\/li\u003e \u003cli\u003e (Continuous\/Program\/\u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Peak:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The opposite of dipping. A peak is an EQ curve that looks like a hill, or a peak. Peaking with an equalizer amplifies a band of frequencies. Peaking also can refer to a very strong signal in an audio path that is overloading or clipping.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003ePeak\u003c\/span\u003e) \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003eRated Maximum \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; SPL:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Sound pressure is the local pressure deviation from the ambient (average, or equilibrium) pressure caused by a sound wave. Sound pressure can be measured using a microphone in air and a hydrophone in water. The SI unit for sound pressure is the pascal (symbol: Pa). The instantaneous sound pressure is the deviation from the local ambient pressure p0 caused by a sound wave at a given location and given instant in time. The effective sound pressure is the root mean square of the instantaneous sound pressure over a given interval of time (or space). In a sound wave, the complementary variable to sound pressure is the acoustic particle velocity. For small amplitudes, sound pressure and particle velocity are linearly related and their ratio is the acoustic impedance. The acoustic impedance depends on both the characteristics of the wave and the medium. The local instantaneous sound intensity is the product of the sound pressure and the acoustic particle velocity and is, therefore, a vector quantity.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eSPL\u003c\/span\u003e \u003c\/span\u003e: 122 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; dB:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Since it expresses a ratio of two (same unit) quantities, it is a dimensionless unit. A decibel is one tenth of a bel (B).We perceive loudness of sound as the logarithm of the actual sound intensity, and dB (decibels) are a logarithmic scale.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003edB\u003c\/span\u003e \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; SPL:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Sound pressure is the local pressure deviation from the ambient (average, or equilibrium) pressure caused by a sound wave. Sound pressure can be measured using a microphone in air and a hydrophone in water. The SI unit for sound pressure is the pascal (symbol: Pa). The instantaneous sound pressure is the deviation from the local ambient pressure p0 caused by a sound wave at a given location and given instant in time. The effective sound pressure is the root mean square of the instantaneous sound pressure over a given interval of time (or space). In a sound wave, the complementary variable to sound pressure is the acoustic particle velocity. For small amplitudes, sound pressure and particle velocity are linearly related and their ratio is the acoustic impedance. The acoustic impedance depends on both the characteristics of the wave and the medium. The local instantaneous sound intensity is the product of the sound pressure and the acoustic particle velocity and is, therefore, a vector quantity.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eSPL\u003c\/span\u003e cont. (128 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; dB:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Since it expresses a ratio of two (same unit) quantities, it is a dimensionless unit. A decibel is one tenth of a bel (B).We perceive loudness of sound as the logarithm of the actual sound intensity, and dB (decibels) are a logarithmic scale.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003edB\u003c\/span\u003e \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; SPL:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Sound pressure is the local pressure deviation from the ambient (average, or equilibrium) pressure caused by a sound wave. Sound pressure can be measured using a microphone in air and a hydrophone in water. The SI unit for sound pressure is the pascal (symbol: Pa). The instantaneous sound pressure is the deviation from the local ambient pressure p0 caused by a sound wave at a given location and given instant in time. The effective sound pressure is the root mean square of the instantaneous sound pressure over a given interval of time (or space). In a sound wave, the complementary variable to sound pressure is the acoustic particle velocity. For small amplitudes, sound pressure and particle velocity are linearly related and their ratio is the acoustic impedance. The acoustic impedance depends on both the characteristics of the wave and the medium. The local instantaneous sound intensity is the product of the sound pressure and the acoustic particle velocity and is, therefore, a vector quantity.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eSPL\u003c\/span\u003e \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Peak:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The opposite of dipping. A peak is an EQ curve that looks like a hill, or a peak. Peaking with an equalizer amplifies a band of frequencies. Peaking also can refer to a very strong signal in an audio path that is overloading or clipping.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003epeak\u003c\/span\u003e) \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003eNominal \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Impedance:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;Electrical impedance, or simply impedance, describes a measure of opposition to alternating current (AC). Electrical impedance extends the concept of resistance to AC circuits, describing not only the relative amplitudes of the voltage and current, but also the relative phases. When the circuit is driven with direct current (DC) there is no distinction between impedance and resistance; the latter can be thought of as impedance with zero phase angle.\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eImpedance\u003c\/span\u003e \u003c\/span\u003e: 8 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; Ohms:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;The unit by which resistance to electrical current is measured. From Ohm's Law (Current=Voltage\/Resistance, or in other words, Current=Voltage\/Ohms), a mathematical expression of the relationship between these three elements. It is also symbolized by the Greek capital letter omega (Ω).\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003eohms\u003c\/span\u003e \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003eDimensions (H x W x D) \u003c\/span\u003e: 650 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; mm:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;One thousandth of a meter (0.039 in.).\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003emm\u003c\/span\u003e x 429 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; mm:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;One thousandth of a meter (0.039 in.).\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003emm\u003c\/span\u003e x 457 \u003cspan class=\"dictionary\" title=\"header=[\u0026lt;span class=boxoverheaderplain\u0026gt;Definition of\u0026lt;\/span\u0026gt; mm:] body=[\u0026lt;table\u0026gt;\u0026lt;td\u0026gt;One thousandth of a meter (0.039 in.).\u0026lt;\/td\u0026gt;\u0026lt;\/tr\u0026gt;\u0026lt;\/table\u0026gt;] cssheader=[boxoverheader] cssbody=[boxoverbody]\"\u003emm\u003c\/span\u003e \u003c\/li\u003e \u003cli\u003e (25.6\" x 16.9\" x 18\") \u003c\/li\u003e \u003cli\u003e \u003cspan class=\"spec\"\u003eNet Weight \u003c\/span\u003e: 21 kg (46 lbs.) \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"JBL","offers":[{"title":"Default Title","offer_id":43892955643947,"sku":"JBL-PRX415M","price":584.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/prx415m_back_z__46671.1682442275.1280.1280.jpg?v=1775679636","url":"https:\/\/www.empirepro.com\/products\/jbl-prx415m","provider":"Empire Pro","version":"1.0","type":"link"}