User manual BEHRINGER B1520 PRO

[. . . ] PROFESSIONAL SERIES User manual A50-28429-00004 fr es it ru B1220 PRO B1520 PRO B2520 PRO B1800X PRO pl nl fi sv da pt el EUROLIVE EUROLIVE PROFESSIONAL SERIES Important Safety Instructions ! This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. 7) Before positioning your speakers, you must always make sure that the surface underneath them is completely firm. A surface that easily vibrates is not sufficiently safe for your speakers, therefore: as a general rule, only place your speakers onto even, firm ground surfaces. 8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. [. . . ] 5) Set the grill back into its place and press gently until it snaps into position. + No warranty claim is valid for damage caused by incorrect handling or flawed and/or careless use. 3. 2 Looping through the subwoofer signal (B1800X PRO) The B1800X PRO subwoofer from the EUROLIVE PROFESSIONAL SERIES features two speaker connectors. In BI-AMPING mode, the PINS 2-/2+ of the input are connected directly with the speaker. PINS 1-/1+ of the input are connected to the PINS 1-/1+ of the output and the signal can be simply looped through. + Please keep in mind that when you switch the B1800X PRO subwoofer to BI-AMPING mode, the input signal is routed to PINS 2-/2+. In this case, PINS 1-/1+ merely serve to loop the signal through! 2. 2 How to prevent feedback Always place the "front of house" speakers ahead of the microphones (from the audience's perspective), and never behind. B1220 PRO, B1520 PRO or B2520 PRO) or an in-ear monitoring system to hear the stage performers. 2. 3 How to avoid feedback when working with record players (DJ applications) In applications with record players, bass feedback can occur. Bass feedback occurs when low frequencies get back to the pickup and are re-reproduced on the speakers. The most common causes for this are: speakers located too closely to the record player, a room with a wooden floor, or presence of a podium or a platform. In such cases, it is best to move the speakers away from the record player and "banish" them from the stage, so that they are located on firm ground. Another option is to use raised stands, which prevent the speakers from having a direct contact with the ground. 3. 3 PARALLEL Input (B1220 PRO, B1520 PRO and B2520 PRO) The EUROLIVE B1220 PRO, B1520 PRO and B2520 PRO loudspeakers feature two speaker inputs laid out in parallel. You can alternatively connect one of the connectors to the output on your power amp and tap into the signal from the amp once again on the second connector, in order to, for example, feed this signal into an additional loudspeaker. This way, you can create stacks consisting of speakers with different impedance values. + ATTENTION: Never connect the output signals of different power amps to both parallel inputs at the same time. This may permanently damage your setup. 2. 4 Loudspeaker protection by using a low-cut filter Try to prevent damage to your speakers caused by extreme oscillation of the bass membrane due to subsonic noise and extremely deep frequencies. Use an equalizer to cut off those frequencies that fall below your speakers' frequency range, or use a low-cut/ high-pass filter. Most equalizers and sound-improvement systems offer a low-cut function, like the BEHRINGER ULTRAGRAPH DIGITAL DEQ1024, for example. Operating Modes 5 EUROLIVE PROFESSIONAL SERIES 4. Pin Assignment (B1800X PRO) Subwoofer B1800X PRO PINS 1-/1+ PINS 2-/2+ INPUT: Full-range input Signal loop OUTPUT: highpass output Signal loop Subwoofer input Tab. Application Examples 6. 1 Full-range stereo operation In the following example, the main stereo output signal of a mixing console is connected to a stereo power amplifier. A B1220 PRO is connected to each of the amp outputs, and these speakers reproduce the entire frequency range (full range). PASSIVE BI-AMPING 4. 1 Subwoofer (PASSIVE) = Feed the full-range signal to the input PINS 1-/1+. PINS 2-/2+ serve as a signal loop through. 4. 2 Subwoofer (BI-AMPING) = Connect the subwoofer signal to PINS 2-/2+. = PINS 1-/1+ of the input are connected to PINS 1-/1+ of the output, and can be used to loop the signal through. [. . . ] Subsequently, the product must be returned in its original shipping carton, together with the return authorization number. Warranty services will be furnished only if the product is accompanied by a copy of the original retail dealer's invoice. Any product deemed eligible for repair or replacement under the terms of this warranty will be repaired or replaced. 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. [. . . ]