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. [. . . ] The actual number of subwoofers used in an installation will depend on both the size of the room and on the manufacturer's design. Of course, having multiple subwoofers enhances the maximum level at which they will play Additionally, . Smoother bass may be obtained by placing two subwoofers asymmetrically in the room, since different sets of room modes would then be excited by each. The peaks of one set of room modes could offset the valleys of the other one to some degree. The Surround Speakers Ideally, the rear speakers will create a diffuse, non-localizable soundfield which envelopes the listener. Creating this effect depends in part on the loudspeakers chosen for the job. If THX-certified dipolar surround speakers are used, they should be located high and to the sides of the listening area, firing to the front and the rear of the room. (See diagram, below. ) This placement ensures that the audience will not be able to localize them as sources of sound, but rather will be enveloped in a diffuse soundfield. 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. 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). [. . . ] No responsibility is assumed for any incidental or consequential damages. Some states do not allow limitations on how long an implied warranty lasts and other states do not allow the exclusion or limitation of incidental or consequential damages, so that the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. and Canada, please contact your local, authorized Proceed distributor for warranty and service information. 66 Obtaining Service We take great pride in our dealers. [. . . ]