User manual REVEL GEM2 REV 1

[. . . ] Gem 2 Loudspeaker Owner's Manual Revel® Ultima ® Harman Specialty Group 3 Oak Park Drive Bedford, MA 01730-1413 USA Tel 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: HSG/Revel Returns Dept. 361560-001 | Rev 1 | 12/07 "Revel, " "Ultima Salon, " "Ultima Voice", "Ultima Studio, " "Ultima Gem, "and the Revel logo are trademarks or registered trademarks of Harman International Industries, Inc. This document should not be construed as a commitment on the part of Harman Specialty Group. Harman Specialty Group assumes no responsibility for errors that may appear within this document. Introduction DOCUMENTATION CONVENTIONS REVEL Ultima Gem2 This document contains general safety, installation and operation instructions for the REVEL Ultima Gem2 Speaker. [. . . ] Use high-quality loudspeaker cable with a maximum total loop resistance of 0. 07 Ohms or less (for each wire run). 7 8 9 10 11 12 13 14 15 16 17 18 · · Note High loop resistances that exceed 0. 07 Ohms (for each wire run) will cause the filter network to be mis-terminated, resulting in considerable degradation of sound quality. Ultima Gem2 Owner's Manual 15 · Vertical bi-amplified connections must be made with identical power amplifiers. Horizontal bi-amplified connections can be made with identical or non-identical power amplifiers with identical gain factors. When making bi-amplified connections, both power amplifiers must receive identical input signals from the associated preamplifier. A "Y" adaptor is required if the associated preamplifier does not offer two connectors per output channel. Otherwise, each power amplifier can be connected to a separate connector for the same output channel of the preamplifier. If desired, contact an authorized Revel dealer for information about the suitability of power amplifier components before connecting the Gem2 to the associated power amplifier. Review the owner's manuals for associated audio components to determine their connection procedures. · · · 16 Ultima Gem2 Owner's Manual SINGLE WIRE CONNECTIONS Single-wired connections are the most common. These are made between one pair of the Gem2 input terminals and one power amplifier output channel as shown in Figure 6. Connect one pair of loudspeaker wires to the desired Gem2 input terminals. Then connect the same pair of loudspeaker wires to the desired power amplifier output channel. Make sure that all terminals are firmly hand-tightened. Figure 6: Single-Wired Connections Gem2 Rear Panel Gem2 POWER AMPLIFIER OUTPUT Ultima Gem2 Owner's Manual 17 BI-WIRED CONNECTIONS Bi-wired connections are made between both pairs of the Gem2 input terminals and one power amplifier output channel as shown in Figure 7. Connect one pair of loudspeaker wires to the high-frequency of Gem2 input terminals. Then connect the same pair of loudspeaker wires to the desired power amplifier output channel. Connect another pair of loudspeaker wires to the low-frequency pair of Gem2 input terminals. Then connect the loudspeakers to the same power amplifier output channel that was selected in Step 2. Make sure that all terminals are firmly hand-tightened. Figure 7: Bi-Wired Connections Gem2 POWER AMPLIFIER OUTPUT 18 Ultima Gem2 Owner's Manual VERTICAL BI-AMPLIFIED CONNECTIONS Vertical bi-amplified connections are made between both pairs of Gem2 input terminals and two separate power amplifier output channels. Note When making vertical bi-amplified connections, both power amplifiers must receive identical input signals from the associated preamplifier. A "Y" adaptor is required if the associated preamplifier does not offer two connectors per output channel. Otherwise, each power amplifier can be connected to a separate connector for the same output channel of the preamplifier. Connect one pair of loudspeaker wires to the high frequency pair of Gem2 input terminals. Then connect the same pair of loudspeaker wires to the desired power amplifier output channel. [. . . ] If the speaker is to be used on a hardwood floor or smooth surface use the glide end of the spike. Screw the first spike into the threaded insert, making sure to include the locking ring & felt washer in the order shown. Make sure the spikes are evenly threaded to achieve a level balance. Spike End Down Felt Washer Locking Ring Spike End Down 4. Glide End Down Step 9: Install the cables to the rear panel of the loudspeaker. If the wires have enough play, stand the pedestal back onto its base and slide the loudspeaker onto the bracket from above, as shown. [. . . ]