User manual BEHRINGER DSP110

[. . . ] SHARK DSP110 Userss Manual Version 1. 2 April 2001 ® www. behringer. com ENGLISH SHARK DSP110 SAFETY INSTRUCTIONS CAUTION: To reduce the risk of electrical 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 electrical 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. [. . . ] By filtering interference it makes the sound more transparent and by eliminating unwanted feedback it allows for raising the volume of the monitors, an effect that is usually welcomed by musicians on stage. Another advantage when using this configuration: one SHARK can control several microphones. As at least four monitor paths are used in a typical live application, all you need are four SHARKs to give you optimum feedback protection. 14 2. 2. 4: Two SHARKs in the monitor path 2. 1. 5 The SHARK used in single channels and subgroups Whenever you want to make sure that wanted feedback such as the feedback sounds produced by a guitar wont be removed, you should insert one or several DSP110 into feedback-prone single channels (e. g. all vocal mics) to one or several subgroups, in which you insert one or several SHARKs. In this way, all channels that are less liable to produce feedback (e. g. those carrying line-level signals, or instrumental microphones with lower volumes) can pass the console unaltered, while only critical microphone channels are controlled by the DSP110. Thus, you can protect your sound reinforcement system against feedback and still use wanted feedback sounds. and monitor systems With the DSP110 you can improve the protection against feedback even before a concert begins, simply by tuning in your sound reinforcement system: once the system has been installed and set up, open all microphone channels and monitor paths, then enable FILTER LEARN mode on your DSP110. The SHARK generates short feedbackcausing signals, which are then sent back to its input and suppressed by the filters. These filters are permanently assigned and can be reconfigured as free searching filters only by means of a RESET. Without the SHARK you could raise the overall volume level only until the first feedback occurs. Please note that the FILTER LEARN mode is limited to about 15 seconds. If you are using not just one DSP110 for the monitor path, you should employ some additional units to safeguard critical signal paths. Experience has shown that during a concert the musicians on stage usually want their instruments made louder in the monitors. With the SHARK you can raise the volume without running the risk of feedback. When the concert begins the DSP110 automatically tracks and removes varying feedback signals produced by moving vocal microphones. 16 2. APPLICATIONS SHARK DSP110 2. 2 The Feedback Destroyer in the SHARK The SHARK identifies feedback by splitting the entire frequency spectrum (20 Hz to 20 kHz) into sections of 1/60 of an octave and determining the level of each of these bands. The values calculated are then referenced to the level of the overall signal. The resulting level difference determines whether or not a filter is set. The SHARK allows you to adapt these decisive parameter to your needs: within a range from 1 through 100 you can edit the feedback detection sensitivity. The standard setting is 50, which ensures the best possible detection of feedback for the majority of applications. [. . . ] To obtain warranty service, the buyer (or his authorized dealer) must call BEHRINGER (see enclosed list) during normal business hours BEFORE returning the product. 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. [. . . ]