User manual PROCEED PAV

[. . . ] PAV Audio/Video Preamplifier PR O C E E D WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. REFER SERVICING TO QUALIFIED PERSONNEL. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. Marking by the "CE" symbol (shown left) indicates compliance of this device with the EMC (Electromagnetic Compatibility) and LVD (Low Voltage Directive) standards of the European Community. NOTICE This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. [. . . ] They should be at least two feet above ear level when seated. Ideally, they would be placed somewhat above ear level even when standing, so that they are unlikely to be localized as people walk around the room. dipolar surround placement L sur sub L C R sur R If more traditional speakers are used, they should be placed such that their output is scattered across the rear of the room. (See diagram, next page. ) Often, the best results will be obtained by placing them relatively high and slightly behind the listener, cross-firing across the rear wall so as to create a large number of reflections with relatively little direct sound arriving at the listening position. 31 conventional surround placement L sur sub L C R sur R The Wiring Low impedance speaker wire must be used throughout the system. This ensures the most efficient transmission of power from the amplifiers to the speakers, which minimizes several forms of audible distortion. Surprisingly, not all speaker wires (including some of the audiophile variety) meet the necessary criteria. As always, your best source of advice is your trained dealer/installer. However, the table below may be used as a worst-case general guide. When in doubt, use a thicker (heavier gauge) wire than is specified below. example wire lengths chart Example Wire Lengths Length (in Feet) up to 12' up to 18' up to 29' up to 51' AWG Size & Stranding 16 gauge (19/29) 14 gauge (19/27) 12 gauge (65/30) 10 gauge (105/30) Working in Unusually Large Rooms Large rooms (in the 4000-6000 cubic feet range) have so much air to move that they may benefit from having additional subwoofers for greater bass impact. The PAV's subwoofer output can easily drive several power amplifiers--simply split its output with Y-connectors. Another technique for large rooms involves the construction of risers for the seating area in a dedicated home theater. Risers tend to enhance the visceral effect of deep bass by providing a resonant platform for the couches and chairs, thereby transmitting structural as well as airborne vibrations to the audience. This approach can be used alone or in conjunction with extra subwoofers. If both techniques are used, consider building one or more subwoofers into the riser, which both conceals the subwoofer's bulk and maximizes the vibrations being transmitted to the listener's chair. (Action movies will never be the same. . . . ) 32 System Planning Guide Experience shows that almost any reasonable amount of time spent in the planning stages will pay for itself two to three times over during the installation-- more if the installation crew includes two or three people. With the background provided in the previous sections, the planning process can be boiled down to a checklist which will ensure that you do not overlook anything important. Video Placement s The primary seating area should be perpendicular to the picture. s Be aware of the trade-off between screen size and perceived clarity. The resolution of NTSC requires a seating distance of at least 4 times the diagonal screen size for maximum perceived clarity (this is why small screens seem so sharp). Y larger images have greater et visual impact. Y may want to go for a seating distance of as little ou as 2 times the screen size to increase visual involvement (although this is probably only realistic if you have a line-doubled television). s Stray ambient light should be minimized. (Drapes, dimmers, light placement) s Leave room for the Left, Center, and Right (LCR) speakers up front, flanking the screen itself, placed with reasonable symmetry with respect to adjacent walls, and all at the same distance from the primary viewing area. s The screen should be well away from side walls, since you want to minimize side wall reflections from the front (LCR) speakers. [. . . ] Experience, dedication, and integrity make these professionals ideally suited to assist with our customers' service needs. If your Proceed component must be serviced, please contact your dealer. Your dealer will then decide whether the problem can be remedied locally, or whether to contact Madrigal for further service information or parts, or to obtain a Return Authorization. The Madrigal Technical Services Department works closely with your dealer to solve your service needs expediently. Important! Return authorization must be obtained from Madrigal's Technical Services Department BEFORE a unit is shipped for service. It is extremely important that information about a problem be explicit and complete. [. . . ]