Electro voice ac one owners manual

Page 1

The lightning flash with arrowhead symbol, within an equi- lateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintance (servicing) instructions in the literature accompanying the appliance. IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a damp cloth. 7. Do not block any of the ventilation openings. Install in accordance with the manufactures instructions. 8. Do not install near any heat sources such as radiators, heat registers, \ stoves, or other app aratus that produce heat. 9. Only use attachments/accessories specified by the manufacturer. 10. Refer all servicing to qualified service personnel. Servicing is require\ d when the appar atus has been damaged in any way, such as power-supply cord or plug is damaged, liquid\ has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, \ does not operate normally, or has been dropped. For US and CANADA only: Do not defeat the safety purpose of the grounding-type plug. A grounding\ type plug has two bla des and a third grounding prong. The wide blade or the third prong are provided for your safety. When the\ provided plug does no t fit into your outlet, consult an electrican for replacement of the absolete outlet. 1. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and\ the CSA E65 - 94 have to be obeyed when servicing the appliance. 2. Use of a mains separator transformer is mandatory during maintenance whi\ le the applian ce is opened, needs to be operated and is connected to the mains 3. Switch off the power before retrofitting any extensions, changing the ma\ ins voltage or th e output voltage. 4. The minimum distance between parts carrying mains voltage and any acces\ sible metal piec e (metal enclosure), respectively between the mains poles has to be 3 mm and needs to be minded at all times. The minimum distance between parts carrying mains voltage and any switc\ hes or breakers t hat are not connected to the mains (secondary parts) has to be 6 mm and needs to be minded at all times. 5. Replacing special components that are marked in the circuit diagram usin\ g the security symb ol (Note) is only permissible when using original parts. 6. Altering the circuitry without prior consent or advice is not legitimate\ . 7. Any work security regulations that are applicable at the location where \ the appliance is being serviced have to be strictly obeyed. This applies also to any regulations about the work place itself\ . 8. All instructions concerning the handling of MOS - circuits have to be observed. Note: SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY) IMPORTANT SERVICE INSTRUCTIONS CAUTION: These servicing instructions are for use by qualified personnel only. To\ reduce the risk of electric shock, do not perform any servicing other than that contained i\ n the Operating Instructions unless you are qualified to do so. Refer all servicing to q\ ualified service personnel. 2

Page 2

AC ONE Meeting the highest requirements of modern audio applications - especial\ ly, when it comes to sound pressure level, coverage and sound quality - is only possible when using\ active multi-co mponent loudspeaker systems which provide the possibility to separately amplify \ and reproduc e the audio signals individual frequency ranges. Active 2-way installations with additional \ sub woofer systems probably offer the best price-performance ratio. The low frequency range of the audio s\ ignal is reprodu ced by the sub woofers while high-quality full-range cabinets take care of the Mid/Hi f\ requencies and voc als. One of the essential advantages when using active 2-way systems with add\ itional sub woof ers is the fact that the vocals are not divided between several speaker systems. This, i\ n return, offers more convenience when adjusting the sound system. Unlike than with active 3- or 4-way con\ figurations -“ d ifficult analyzing and measuring of sound fields is unnecessary. Since locating low-frequency sound is merely impossible, simply using mo\ naural sub woof ers is absolutely sufficient for smaller stages or rooms. On wider stages it is indispensa\ ble to use indiv idual sub woofer systems for both sides. Otherwise, the level differences between bass an\ d treble would res ult in audible degradation of the overall sound. Of course, adding a centrally located \ sub woofer might additionally improve the sound quality. The AC ONE Controller has been designed to be used in high-performance installatio\ ns that employ ac tive 2-way systems plus sub woofers. Applications like these also mostly inco\ rporate profess ional linear power amplifiers like the Electro-Voice P1200, P2000, P3000 or Q44, Q66. When \ using processor contro lled power amplifiers like the Electro-Voice P1250, the processor section is \ simply switched of f. Installing and operating the AC ONE Controllers is easy as can be since the user does not need to know any complex detail about crossover functions and equalization. All contr\ ols for matching the sound to different acoustic conditions and loudspeaker systems are located on the\ front panel. Di fficult tasks - like electronic signal routing and settings for instance - are automatically \ carried out insid e the appliance. The newly designed PowerMax12 crossover function (patents pending) optimal\ ly utilizes amp lifier output power and loudspeaker transmission capacities. Compared to conventional \ crossovers or controllers, this results in an improved overall sound quality which is achieved with less\ effort. The AC ONE Controller is also most suitable for integration in active 2-way instru\ ment reinforcem ent applications for keyboards, E-bass and drums. The PowerMax12 crossover f\ unction eliminat es the often complained about lack-of-punch-and-definition, like it is common\ for conventional activ e musical instrument reinforcement systems. Its excellent dynamic range of more than 116dB, the extremely low noise \ level and the outs tanding price-performance ratio makes the AC ONE Controller an advantageous alternative to conventional crossover and controller solutions -“ even in the critical field of pe\ rmanent installati on. CONTENTS Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \ . . . . . . . . . . . . . . . . . . . . . . 3 Front Pane l. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \ . . . . . . . . . . . . . . . . . . . . . . 4 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \ . . . . . . . . . . . . . . . . . . . . . . 5 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \ . . . . . . . . . . . . . . . . . . . . 7 Block diagra m. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \ . . . . . . . . . . . . . . . . . . . . 8 Dimension s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \ . . . . . . . . . . . . . . . . . . . . . . 9 INTRODUCTION 3