User manual VTC PRO AUDIO FF1 SERVICE MANUAL

[. . . ] REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. Read Instructions: The Owner's Manual should be read and understood before operation of your unit. Please, save these instructions for future reference and heed all warnings. Packaging: Keep the box and packaging materials, in case the unit needs to be returned for service. Warning: To reduce the risk or fire or electric shock, do not expose this apparatus to rain or moisture. [. . . ] Terminals marked with the "lightning bolt" are hazardous live; the external wiring connected to these terminals require installation by an instructed person or the use of ready made leads or cords. L'appeil ne doit pas être exposé à des égouttements d'eau ou des éclaboussures et qu'aucun objet rempli de liquide tel que des vases ne doit être placé sur l'appareil. Assurez que lappareil est fourni de la propre ventilation. Ne procédez pas à l'installation près de source de chaleur tels que radiateurs, registre de chaleur, fours ou autres appareils (incluant les amplificateurs) qui produisent de la chaleur. Les dispositifs marqués d'une symbole "d'éclair" sont des parties dangereuses au toucher et que les câblages extérieurs connectés à ces dispositifs de connection extérieure doivent être effectivés par un opérateur formé ou en utilisant des cordons déjà préparés. Power Sources Alimentation Hazards Risque Power Cord Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. The AC supply cord should be routed so that it is unlikely that it will be damaged. Protect the power cord from being walked on or pinched particularly at plugs. The basic system is a single VTC FF1 used for each full range enclosure or multiple VTC FF1s along with individual full range enclosures Level Control A setting of 0 dB on the VTC FF1 Level control is the correct starting point when setting up a sound system. From there, adjustments can be made for the best sound. The 0 dB mark refers to the setting that will give full power when the line input is used and the input signal is at a level of +4 dBV. Processing The VTC FF1 provides Highpass and Lowpass filtering. The highpass filtering provides protection against frequency content that could damage the subwoofer driver. This filtering is optimized for the driver/enclosure combination. No additional subsonic/highpass filtering is required. The low pass filtering provided is adequate for the subwoofer side of the subwoofer to woofer crossover. The user may choose to provide additional lowpass filtering depending on the application. The electronic highpass and lowpass filtering each have 24dB/Oct. 12 dB is placed before the excursion limiting and an additional 12 dB is placed after the limiting for both filter functions. [. . . ] This can happen without audible distortion since the filters will filter out the distortion. At high power levels, when the limiter is operating, increasing the subwoofer level control will not increase the output. Do Not increase the setting while operating at high levels. NOTE: The VTC FF1 built-in stand mounting adapter can be used to support some VTC Pro Audio enclosures. Maximum pole extension for mounted enclosures is 48-inches for 85 lb. enclosures and 60-inches for enclosures that are less then 55 lbs. [. . . ]