User manual BEHRINGER ACX900

[. . . ] ULTRACOUSTIC ACX450/ACX900/ACX1800 Users Manual Version 1. 1 June 2006 ULTRACOUSTIC ACX450/ACX900/ACX1800 IMPORTANT SAFETY PRECAUTIONS DETAILED SAFETY INSTRUCTIONS: 1) Read these instructions. CAUTION: To reduce the risk of electric shock, do not remove the top cover (or the rear section). No user serviceable parts inside; refer servicing to qualified personnel. 8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. [. . . ] FUSE RETAINER/VOLTAGE SELECTOR: Please make sure that the voltage indicated by the voltage selector matches the local voltage before you connect the unit to the main power supply. Some units feature a fuse retainer in which a selection between 230 V and 120 V is possible. Please be aware: When using your unit outside of Europe with 120 V, a fuse with a higher rating is required. 2. 2: Rear panel connectors Use the balanced LINE outputs (XLR connections) to connect your ULTRACOUSTIC to the inputs of a mixing desk (only in ACX1800 and ACX900). With the GND LIFT (ground lift) switch you can disconnect the ground connection between the amplifier and the mixing desk (switch pressed). You also have the option to take up the audio signal from the instrument channel at the TUNER output and to feed it to the tuner. The foot switch enables you to switch the effects of both channels on and off (corresponds to the function of the IN/OUT switch ). The CD IN input (RCA) allows for the connection of an external stereo source. You can for example play your favourite tune while being accompanied with music from a CD, MD or a drum machine. 6 2. CONTROL ELEMENTS AND CONNECTIONS ULTRACOUSTIC ACX450/ACX900/ACX1800 3. APPLICATIONS 3. 1 Connecting options for the ACX450 3. 2 Extended connecting options (ACX900 and ACX1800) Fig. 3. 1: Cabling options of the ACX450 The above cabling is suitable for sessions in the rehearsal room or for practicing at home. If desired, connect another instrument or a dynamic microphone to channel 2. Connect the supplied FS112 foot switch to the foot switch input at the rear panel. With the foot switch, you can switch the effects units of both channels on and off, which is particularly useful during live performances. Of course, a MD player or a computer can be used as playback device as well. Fig. 3. 2: Extended connecting options (ACX900 and ACX1800) Models ACX900 and ACX1800 offer a wide range of additional connecting options. The above figure shows only one of many possible installations: The instruments, microphones, the foot switch as well as the CD player are connected as shown in figure 3. 1. The tuner is connected to the tuner output where there is a constant instrument signal. If you wish to integrate external effects units, you can do this separately for each of the two channels. Connect the input of the effects unit to the INSERT SEND of one of the respective channels, and connect the effect output at the unit to the INSERT RETURN jack of the same channel. Instead of the two stage effects units shown here connected in series in the signal path, you can establish a parallel effects loop, e. g. [. . . ] If the product needs to be modified or adapted in order to comply with applicable technical or safety standards on a national or local level, in any country which is not the country for which the product was originally developed and manufactured, this modification/adaptation shall not be considered a defect in materials or workmanship. The warranty does not cover any such modification/adaptation, irrespective of whether it was carried out properly or not. Under the terms of this warranty, BEHRINGER shall not be held responsible for any cost resulting from such a modification/adaptation. Free inspections and maintenance/repair work are expressly excluded from this warranty, in particular, if caused by improper handling of the product by the user. [. . . ]