User manual BEHRINGER ACX450

[. . . ] 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. 5) Do not use this apparatus near water. [. . . ] 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). This is done to eliminate buzz or ground loop hum. 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. There is a continuous signal at this jack. Connect the supplied double foot switch to the FOOT SW(ITCH) jack. 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. Connect your guitar to the instrument input jack of channel 1. 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. To play along with a playback, connect a CD player to the CD input. 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. [. . . ] s damages/defects caused by force majeure or any other condition that is beyond the control of BEHRINGER. Any repair or opening of the unit carried out by unauthorized personnel (user included) will void the warranty. If an inspection of the product by BEHRINGER shows that the defect in question is not covered by the warranty, the inspection costs are payable by the customer. Products which do not meet the terms of this warranty will be repaired exclusively at the buyers expense. [. . . ]