ARX c.cdr - Prodance
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1. As a vague rule we can say that Rock and highly compress music require a power amplifier delivering a power value slightly bigger than the rated maximum power of the speakers However we recommend the power amplifier rated power be 1 5 times bigger than the rated maximum power of the speakers Example ifthe power amplifier rated power is 200W RMS at 81 the rated maximum power of the speakers should be 200x1 1 5 133 4W RMS at 81 Using the power amplifier Saturation and input levels In order to make the most of your power amplifier you must watch two things 1 Set the volume controls in a way that the saturation LED lights up only occasionally peaks 2 Feed the power amplifier with an audio signal of the appropriate level What is the appropriate level Professional Power Amplifiers are set for an input level of 4 dBu Do not panic itis easy to get to it 4 dBu is just a fixed measure of the audio signal that professional audio community uses as reference level itcan be expressed also in Volts 4dBu equals 1 23 Volt RMS So to speak the Power Amplifier will work at its best if feed with a signal of a level near the 4 dBu or 1 23 Volt RMS How do we set this level Easy using the mixer appropriately Incidentally the nominal level fora professional audio mixer is also 4dBu Therefore if we set the master output level of the mixer carefully monitoring the output level meters normally LED bars we will ensure that the level of2. professional audio devices and that saturation or other signal deterioration present in one device will appear someway or another at the serial bounded following devices If we deliver saturated signal from the mixer to the power amplifier we will not be able to get rid of this saturation whatsoever The power amplifier will amplify all what is given and if noise is given saturation at mixer it will be amplified Naturally thatis bad Power amplifiers and loudspeakers Current professional power amplifiers are quite reasonably protected against signal deterioration and excessive levels and shortcuts Loudspeakers are not that well protected hence a rule or some must be devised to use the correct speakers with a given power amplifier Well that rule is nota straightforward statement but more of an understanding of the principles and nature of the audio signal The nature of the audio signal reefer to the type of music you are playing and more specifically of its Dynamic Range The bigger the Dynamic Range the bigger the power amplifier needed If the Dynamic Range of a give audio signal is big the difference between the minimum level and maximum level of this audio signal will be big as well Therefore we will need an oversized power amplifier with enough power to amplify the maximum levels without reaching the saturation level at the power amplifier normally power amplifiers have red LEDs to let you know when they start saturating
3. ARX SERIES Manual de usuario User Manual 2 AKIYAMA GO LIFE ARX series User manual Thank you for choosing AKIYAMA Thank you for purchasing this AKIYAMA ARX SERIES speakers The loudspeaker is designed to provide you high performance Please take a few moments to read these instructions carefully to fully maximize the performance of the speaker For information about AKIYAMA check out website www akiyamadj com INTRODUCTION The ARX loudspeakers are designed for professional use Brilliant sound at high sound pressure levels high quality components a reliable service and all this toa reasonable price these are the pretensions of the ARX SERIES The series consist of 8 10 12 15 2X15 PREVENTIVE MEASURES 1 Please read this information carefully 2 Keep all information and instructions in a safe place 3 Please follow the instructions 4 Please observe all warnings Don t remove safety instructions or any other information located on the device 5 Use the device only in the intended manner 6 Use only stable and appropriate stands and or mounts when the device is permanently installed 7 Do not install the device near radiators heat accumulators ovens or other sources of heat Make certain that the device is always installed so that is cooled sufficiently and cannot overheat 8 Do not place open sources of ignition e g burning candles on the device 9 Do not cover ventilation
4. ks you should know Setting input levels at the mixer Gain pot adjusts the input sensibility or so to speak the level of the input signal inside the mixer It is paramount to set the right input level on every channel Why is so important setting the correct input level First we have to understand the concept of Dynamic Range of an audio signal The Dynamic Range of an audio signal is defined as the ratio between the maximum level before distortion and the minimum audible level It is measured in decibels and gives us an idea of the amplitude of the signal Dynamic Range zan ii Pic Transient Dynamic range Ratio Max Level vs Minimum audible level Electroacoustic Signal Minimum audible level 4 5 6 T 8 Time We want the audio signal to fluctuate away from the maximum level distortion begins and away from the minimum level or background level where some noise is present due the nature of the ICs used in the electronic circuit all ICs induce noise into the audio signal At the draw we depict this safe level within two discontinue lines We have to set the level of input signal so that the signal peaks do not reach saturation levels and the lower amplitude parts of the signal are not too near the background noise level SATURATION HEADROOM SIGNAL E DYNAMIC RANGI 90 cam NOISE We have to acknowledge that a professional audio system is a serial bounded group of
5. rate plastic and paper cardboard 21 Plastic bags must be kept out of the reach of children CAUTION HIGH VOLUME This product is designed for professional use Therefore the commercial use of this equipment is liable to the rules and regulations of the Accident Prevention amp Insurance Association of your industry sector Risk of hearing damage due to prolonged exposure to excessive volumes When using this product high sound pressure levels SPL can be generated sufficient to cause permanent hearing damage to performers production crew and audience members Caution should be taken to avoid prolonged exposure SPL in excess of 90 dB CONNECTIONS The ARX series speakers have an extremely flexible connectors There are two Speakon jacks as well as two 6 35MM jacks The jacks are wired in parallel which allow you to daisy chain additional speakers Thus you can use one amplifier channel to power multiple speakers O 6 35MM JACK SPEAKON CONNECTOR O F OREO 0100 osoa 0200 2 0 COROR BE GEO ORG OROLOROLORORS Or OBS OSOS OROORO OOR r SS Skr 3 ORORORORO O E o EMP SERIES o o EMPARAS o CAUTION DO NOT USE MORE THAN ONE JACK AS AMPLIFIER IMPUT Level or amplitude ARX series User manual 15 min Read me Before unwrapping and starting your loudspeakers there are afew thin
6. slots 10 Do not operate the device in the immediate vicinity of water Do not expose this equipment to combustible materials liquids or gases 11 Please make certain that dripping or splashing water cannot get inside the device Do not put objects filled with fluids such as vases or drinking vessels on top of the device 12 Make certain that objects cannot fall into the device 13 Use the device only with accessories with which the manufacturer intends the device to be used 14 Do not turn on the device immediately if it was exposed to strong temperature fluctuations for example after transportation Moisture and condensation may damage the device Leave the device switched off until it has reached room temperature 15 Do not open the device and do not make any changes to the device 16 In order to prevent damage or accidents for example due to tripping hazards check all connections once you have connected the device 17 During transport make certain that the equipment being transported cannot fall down and possibly cause personal injuries and or property damage 18 If your device no longer works properly if it has been exposed to liquids or an object has fallen inside it turn the device off immediately u This device should be repaired only by authorized experts 19 Use only adry cloth to clean the device 20 Comply with all of the disposal laws that are applicable in your country During disposal please sepa
7. the audio signal fed to the Power Amplifier is near 4dBu because the nominal level of the mixer is 4dBu and we set correctly the output level or the mixer Why we should avoid saturation Obvious reasons aside there is a more material reason Saturated signal can damage your speakers Although some speakers have overload protection a highly saturated signal can deliver D C and this phenomenon can easily shatter your speakers ARX series User manual SPECIFICATIONS ESPECIFICACIONES ARX 110 ARX 112 Type Tipo 2 Way passive loudspeaker 2 vias pasivo Diameter Di metro Impedance Impedancia Woofer Coil Bobina 5 10 8 ohm 8 ohm Titanium 1102 180 Ww 3004 9208 Max srt i0as 1134 B Impedance B ohm 8 ohm 2xSpeakont 2xSpeakon 2x6 35mm 2xSpeakont Connector 2x6 35mm jack jack 2x6 35mm jack Magnet Iman 30 oz Diameter Diametro Impedance Impedancia Tweeter Diam Material Titanium Magnet Iman 11 oz Power Ouput RMs 150 Power OuputPosk 250 Frequency Response ___ 60H2 20Ktz 9048 co co o o gt 3 3 2xSpeakont 2xSpeakont 2x6 35mm Connector 2x6 35mm jack jack I C Praga n 11 Pol Cova Solera 08191 Rub Barcelona Spain www akiyamadj com info akiyamadj com
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