User manual REVEL M22 REV 0

[. . . ] Revel Performa M22 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 Support: Telephone: 781-280-0300 | Sales Fax: 781-280-0495 | Service Fax: 781-280-0499 Please contact Customer Support for information about product shipments. Part No. 350548-001 | Rev 0 | 12/03 "Revel, " "Performa, " and the Revel logo are registered trademarks of Harman International Industries. 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. TABLE OF CONTENTS Documentation Conventions . [. . . ] Use the cloth to lightly wipe the cabinet surface. FILTER NETWORK Optimizes loudspeaker on-and-off axis response with high-order filter at 2. 2kHz, helping to ensure smooth octave-to-octave balance and timbral accuracy. Separate woofer and tweeter filter boards prevent mutual interference between filter network components, dramatically reducing distortion over a wide dynamic range. Gold-plated binding posts accommodate heavy speaker cables, while separate Placement Compensation and Tweeter Level controls provide precise balance to compensate for less-than-ideal loudspeaker placement and listening room acoustics. WOOFER PORT Enhances low-frequency extension. Computer-optimized internal and external flares minimize distortion resulting from air turbulence. Note The grille can also be cleaned using a vacuum with a soft-bristled brush attachment. INPUT PANEL The numbers in Figure 4 at the top of the next page correspond with the numbered items in this section. CAUTION To prevent cabinet damage, do not use a cloth made with steel wool or metal polish to clean the cabinet. To prevent possible transducer damage, do not apply furniture polish directly to the cabinet. 1. Placement Compensation Control Optimizes the M22's response to different loudspeaker placements. Refer to the Loudspeaker Placement section that begins on page 10 for more information. · Select the Flush Mounted setting if the M22 is placed in a bookcase or wall unit or if the M22 is located less than 2 feet (0. 61m) from walls and other objects. Select the Stand Mounted setting if the loudspeaker is placed on a stand (such as the optional pedestal stand). · 8 Figure 4: Rear View The numbers in Figure 4 (shown here) correspond with the numbered items in the Input Panel section that begins below. 2. Tweeter Level Control Alters tweeter output levels by -1, -. 5, 0, +. 5, or +1dB. 3. Move the M22s closer to the corners or walls of the listening room to increase bass response. Set the Placement Compensation control to Stand Mounted if the M22 is is placed on stand such as the optional Performa Pedestal 22 stand shown in Figures 5 and 6 on the previous page. For best results, align the tweeter with the listener's ears as shown in Figure 6, with the front of the M22 facing toward the listener's head. Refer to the Performa Pedestal 22 Assembly Instructions that are included with the optional pedestal stand for additional information. · Set the Placement Compensation control to Flush Mounted if the M22 is placed in a bookcase or wall unit as shown in Figure 7 at the bottom of the previous page. LISTENING ROOM ACOUSTICS · Listening rooms have a profound impact on sound, particularly at lower frequencies. Ideally, listening rooms would include optimized dimensional ratios to minimize the effects of room resonances. But in reality, most listening rooms are not designed to enhance loudspeaker performance. The interaction between loudspeakers and listening rooms is complex, depending on two important determinants that affect the loudspeaker and the listener. Surfaces and other boundaries often cause large peaks and dips in lowfrequency response. Standing waves (also known as room modes or resonances) interact with both the loudspeaker and the listener, resulting in large frequency response errors. Unfortunately, there is no simple solution that considers both factors. Even computer software programs that examine both factors may not calculate proper primary listening position or loudspeaker placement values. In most cases, proper selection of the primary listening position combined with proper placement of the loudspeaker can still result in superior performance at lower frequencies. The difference between superior and inferior results is often just a small adjustment of the primary listening position or loudspeaker placement. [. . . ] Experiment with the M22's placement to achieve the best overall tonal balance, image precision, and sense of spaciousness in the listening room. Refer to the Loudspeaker Placement section that begins on page 10 for additional information about loudspeaker placement. Adjust the Tweeter Level control on each M22 to change high-frequency balance and timbre. If desired, contact an authorized Revel dealer for information about the suitability of power amplifier components before connecting the M22 to the associated power amplifier. 14 SPECIFICATIONS Specification Sensitivity Value 86. 5dB SPL with 2. 83Vrms @ 1m (4 pi anechoic) Definition Indicates the amount power the associated power amplifier must deliver to drive the loudspeaker at reasonable volume levels. [. . . ]