User manual BEHRINGER GEQ3102

[. . . ] ULTRA-GRAPH PRO GEQ3102 Users Manual Version 1. 1 July 2000 ® www. behringer. com ENGLISH ULTRA-GRAPH PRO GEQ3102 SAFETY INSTRUCTIONS CAUTION: To reduce the risk of electric shock, do not remove the cover (or back). No user serviceable parts inside; refer servicing to qualified personnel. WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure - voltage that may be sufficient to constitute a risk of shock. This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. [. . . ] These are the ULTRA-GRAPH PROs balanced 1/4" jack and XLR audio inputs. The jack and XLR plugs of each channel are wired in parallel. 11 12 13 14 15 16 2. APPLICATIONS The flexible concept behind the BEHRINGER ULTRA-GRAPH PRO, with its great variety of audio processing features, opens up a whole new world of applications. Wed like to present you with a few examples in the following plus some typical settings. 8 2. APPLICATIONS ULTRA-GRAPH PRO GEQ3102 2. 1 Master equalizer in sound reinforcement systems This is the ULTRA-GRAPH PROs probably most common field of application. Fig. 2. 1: The ULTRA-GRAPH PRO as a master equalizer Please note the following points to achieve optimum results: Practice has shown that it will be useful to listen to some unprocessed music and speech material before you start equalizing your sound reinforcement system. If any distortion can be heard, try to eliminate it within the system. No equalizer can improve a system sound that lacks transparency due to reflections from walls and ceiling. Often, drastic improvements can be achieved by modifying speaker placement and alignment. If you are using an active multi-way system you should take some run-time and phase correction measures before you work with the ULTRA-GRAPH PRO (the crossover network BEHRINGER SUPER-X PRO CX3400 provides all the necessary tools with its variable split frequencies, phase reverse switches and electronic runtime correction facility). Interference such as mains hum and narrow-band resonance should be eliminated with the ULTRA-GRAPH PRO, before you start doing a sound check. Once this basic setting has been made, you can continue to fine-tune the system by hand. Please remember: A linear response curve is not desirable for all kinds of application. For example, intelligibility is more important in speech applications: here, you should apply a slight roll-off in the bass range, because below the frequency range of voices there are no wanted frequencies but only interference (rumble, etc. ). In general, extremely low and high frequencies are transmitted with much lower amplitudes. There is no sense in forcing a small full-range speaker to reproduce frequencies below 50 Hz; apart from a need for higher power reserves, speaker damage will be the most likely result. + You should always take the physical limits of your system into account, no matter which settings you choose. Once the system has been adjusted as precisely as possible to produce the desired response curve, you should walk around the room to get an impression of the sound produced in various places. Remember to make regular breaks during these listening tests and to play back various music and speech programs, so that you get a feel for the response characteristics of your system and of the room. 2. APPLICATIONS 9 ULTRA-GRAPH PRO GEQ3102 + Good equalizer settings require time and patience!If you need to use extreme EQ settings to achieve an acceptable frequency response, the reason might be some serious misalignment of sound reinforcement system or room acoustics. Equalizers cannot make up for poor audio systems, but they are extremely useful and efficient tools for making musical fine-adjustments, as this often produces astounding improvements in terms of acoustic power and overall sound quality. 2. 2 Equalizer in the monitor path To use the ULTRA-GRAPH PRO in the monitor path, you should basically follow the same procedure as described in section 2. 1. On stage, you should keep volume levels as low as possible, because: 1. Use concert pauses to reduce the levels of all monitor paths by about 3 dB. The musicians on stage will hardly notice this reduction (or even not at all), because their hearing, too, can relax a bit during the break. [. . . ] Subsequently, the product must be returned in its original shipping carton, together with the return authorization number to the address indicated by BEHRINGER. Warranty services will be furnished only if the product is accompanied by a copy of the original retail dealers invoice. Any product deemed eligible for repair or replacement by BEHRINGER under the terms of this warranty will be repaired or replaced within 30 days of receipt of the product at BEHRINGER. 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. [. . . ]