User manual REVEL F12 REV A

[. . . ] Revel Concerta F12 Loudspeaker Owner's Manual ® TM 3 Oak Park, Bedford, MA, 01730-1413 USA Telephone: 781-280-0300 Fax: 781-280-0490 www. revelspeakers. com Customer Service: Telephone: 781-280-0300 Sales Fax: 781-280-0495 Service Fax: 781-280-0499 Product Shipments 16 Progress Road Billerica, MA 01821-5730 USA Part No. 353732-001 | Rev A | 11/04 ©2004 Harman Specialty Group. This document should not be construed as a commitment on the part of Harman Specialty Group. The information it contains is subject to change without notice. Harman Specialty Group assumes no responsibility for errors that may appear within this document. [. . . ] The difference between superior and inferior results is often just a small adjustment of the primary listening position or loudspeaker placement. If you have questions, contact an authorized Revel dealer for assistance. To determine reflection points using the mirror method: 1. Once the F12s have been placed, sit in the primary listening position. Ask another person to slide a mirror along the listening room walls. Note the locations at which the person sitting in the primary listening position can see either F12. Be sure to look for both F12s in the reflection on each room boundary. These are reflection points that require acoustic treatment materials. If acoustic treatment materials are not available, hanging a rug over the reflection points will help to reduce degradation in overly "live" rooms. Carpeting the floor between the loudspeakers and the primary listening position and placing irregular surfaces such as bookcases at first reflection points will also help minimize strong reflections. FEET AND OPTIONAL SPIKES When shipped, rubber feet are attached to the bottom of the cabinet for optimal stability, accommodating installations on tile and hardwood floors. The F12 is shipped as shown on the left side of Figure 7 (next page). Acoustic Treatment Materials The F12 features high-order filters at 575Hz and 3. 0kHz that optimize loudspeaker onaxis and off-axis response, minimizing degradations that occur in overly "live" rooms. Placing minimal acoustic treatment materials at primary reflection points will reduce these distortions even further. Ideally, acoustic absorbers should be placed at the first reflection points on the front and side walls and either acoustic absorbers or diffusers should be placed at the first reflection points on the rear wall. Because the listener's eyes and ears are on the same plane, the "mirror method" is an accurate determinant of critical reflection points. This method can be used to determine reflection points for side walls, rear walls, front walls, and even the ceiling. Applying acoustic treatment materials to the side walls is most important, followed by the front wall, rear wall, and ceiling. Note When moving the F12, avoid dragging it across the floor, as this will damage the feet, the spikes, and/or the wood cabinet itself. Always lift the F12 and carry it to its new location Four metal spikes are included for use when the loudspeaker is placed on carpeted floors. Insert the spikes into the threaded inserts at the bottom of the feet as shown on the right side of Figure 7 (next page), so that the spikes protrude from the cabinet. REVEL Concerta F12 Owner's Manual 11 Figure 7: Adjustable Spike feet When shipped, the rubber feet are attached as shown here for loudspeaker placement on tile or hardwood floors. The spikes should be inserted as shown here for loudspeaker placement on carpeted floors. (Threaded into Center of Foot) To install the spikes: 1. Place the F12 on its side on a soft towel or carpeted floor. Rotate the spike clockwise into the threaded insert in the center of a rubber foot, round end first, as shown on the right side of Figure 7 (above). Repeat step 2 for the remaining three spikes. Make sure to thread each spike fully to achieve a level balance. When all four spikes have been installed, stand the F12 in the upright position. [. . . ] Combined with carefully designed transducers and filter networks, this approach helps the F12 to maintain its performance under extreme operating conditions. However, all loudspeakers have limits when it comes to continuous playback. To extend these limits, avoid playback at volume levels that distort or strain sound. CAUTION · Failure to remove the shorting straps may damage the associated power amplifiers. OPTIMIZING PERFORMANCE To optimize the F12 for best performance: 1. Make connections with power amplifier(s). [. . . ]