User manual ELECTRO-VOICE AC-ONE

[. . . ] When the provided plug does not fit into your outlet, consult an electrican for replacement of the absolete outlet. 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 in the Operating Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. 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. [. . . ] Compared to conventional crossovers or controllers, this results in an improved overall sound quality which is achieved with less effort. The ACONE Controller is also most suitable for integration in active 2-way instrument reinforcement applications for keyboards, E-bass and drums. The PowerMax12 crossover function eliminates the often complained about "lack-of-punch-and-definition", like it is common for conventional active musical instrument reinforcement systems. Its excellent dynamic range of more than 116dB, the extremely low noise level and the outstanding price-performance ratio makes the ACONE Controller an advantageous alternative to conventional crossover and controller solutions ­ even in the critical field of permanent installation. FRONT PANEL 1. Input "A" and "B" level controls These controls are normally set to their "0"-marked (detent) center position. If needed or desired, the controls can be used to individually adjust the input levels of the channels "A" and "B". The green "Signal" LEDs indicate that audio signals are present at the inputs. The red "Peak" LEDs light whenever the audio signal is clipped inside the ACONE which might result in distortion. In case the "Peak" LEDs light continuously, lowering of the input levels is recommended to maintain the entire dynamic range. 2. Lo-Cut filter control This control is normally set to its center (50Hz) position. The filter is used to eliminate unwanted low-frequency noise. 3. Lo-EQ control This control is normally set to its center (6dB) position and it is used to correct the frequency response of the sub woofer systems. When the control is set to its clockwise margin, low bass frequencies are amplified by +12dB. The audio signal stays unaltered when the control is positioned at its counter-clockwise margin. 4. Mid-EQ control This control is normally set to its center (-4dB) position. It is used to increase the audio level in the 4kHz range. Setting the control to its clockwise margin results in no change in the frequency response but delivers the farthest coverage of the sound reinforcement system. Setting the control to its counter-clockwise margin provides pleasant audio even in the near field of the loudspeaker systems. 5. Hi-EQ control This control is normally set to its center (4dB) position. The control is used to increase the audio signal's high frequency range which allows to accomplish improved intelligibility and brilliance even when using loudspeaker systems with diminished treble characteristics. [. . . ] Power-On switch The ACONE's outputs employ high quality audio relays. Correct types and values are marked on a label on the rear panel of the appliance. 17. Mains connector Please, make sure to only use the supplied mains cord to connect the appliance to a mains wall outlet. SPECIFICATIONS Technical Specifications ACONE All level and frequency controls in center position, Lo-EQ and Hi-EQ controls at 0dB, MID-EQ control at -4dB, unless otherwise specified. Note: 0dBu = 0. 775V Crossover Mode Frequency, sweepable Filter Type LO-Cut Filter Type Frequency, sweepable Equalization LO-EQ MID-EQ HI-EQ Inputs A, B Type Input Impedance Maximum Level Rated Level Gain Range Parallel Outputs A, B Outputs HI, LO, SUB Type Output Impedance Maximum Level Rated Level Gain Range Frequency Response, -3dB @ 1kHz, Lo-Cut 20Hz Nominal Gain Maximum Gain Dynamic Range, +20dBu, noise A-weighted THD+N, 20Hz . . . [. . . ]