User manual PROEL AUP4250

[. . . ] This unit, for example, should not be placed on a bed, sofa cover o similar surfaces that could cover ventilation openings, or placed in a built-in installation, such a bookcase or a cabinet that could block air flow trough ventilation openings. Heat: This apparatus should be placed away from heat sources, like radiators, heat registers, stoves or other products (including amplifiers) that produce heat. power sources: · This apparatus should be connected only to power source type specified in this owner's manual or on the unit. ⷠIf the supplied AC power cable plug is different from the wall socket, please contact an electrician to change the AC power plug. [. . . ] Don't open this unit: Don't attempt to open or to repair this unit by yourself. For any problem solution not described in this owner's manual, please refer to qualified personnel only or consult us or your National Distributor. damages requiring services: · Don't attempt to do operations not described in this user's manual. ⷠIn the following cases please refer to an authorized maintenance center or skilled personnel: - When the unit works improperly or it doesn't work at all. Maintenance: The user shouldn't attempt maintenance operation not described in this user's manual. Every maintenance operation should be done by qualified personnel only. ⷠDon't install, connect or disconnect power supply when the unit is powered, otherwise there's an high risk of electric shock. ⷠDon't open the unit, there are no user serviceable parts inside. ⷠIf you detect a particular smell from the unit, please immediately turn it off and disconnect the AC power cord. To obtain good speakers wire contacts, please tighten the screw terminals firmly. This unit should be placed in a rack (see INSTALLATION) and kept far from: Wet places Direct exposure to heat sources (like sun light) Non properly ventilated places Disconnect the power cord during storms or when the unit is not used. In order to prevent fire and electric shock risks, it's necessary to keep the unit far from sprinkling and drops. Please don't put cups, vases or other object containing liquids over the unit. In case of interferences from source signal, THD value will raise over 10%. Don't place this unit in a bookshelf o in other places with small room. Is not responsible for any damage that occurs due to a wrong unit installation. Thank you for choosing one of Proel products, and for your confidence towards our brand, synonymous of professionalism, accuracy, high quality and reliability. All our products are CE approved and designed for continuous use in professional installation systems. Description AUP4150 and AUP4250R have been designed specifically for announcement, music diffusion and sound reinforcement in all PA systems applications. ⷠThe characteristics of each booster of these AUP power unit series are as follows: · Low , high and master tone control. For a correct amplifier use, the volume level must be adjusted within the level shown when green LED ON "SIG" . If the volume level activated LED RED "CLIP" the output signal is distorted and the volume level should reduced (3) Led for overload indication Such led is on when the system is in auto-protection status (4) Switch ON (5) TONE control Tones control operates +/-10 dB for low and high frequencies range and makes possible a correct equalization of the reproduced signal (6) Fuse protection Protects the unit from eventual main power supply variations and current fluctuation . [. . . ] Use the most suitable connection accordingly to the audio telephone signal characteristics. CONSTANT IMPEDANCE LINE In order to have a constant impedance line (8/4) connect the two terminals respectively to COM e 8 o 4 (fig. The total power of the speakers cannot be below the output amplifier power . The cable section should be defined and increased considering these distances. [. . . ]