Mackie FRS-2800 Owner's Manual - Page 9

Owner's Manual Rear Panel Features 5. POWER CORD SOCKET This is where you connect the detachable power cord included with your amplifier. Plug the other end of the power cord into an AC outlet properly configured with the voltage required for your particular model. Be sure the AC outlet can supply enough current to allow full power operation of all the amplifiers plugged into it. The outlet should be a three-prong socket that matches the power cord. 6. FAN VENTS Do not obstruct the ventilation openings of the amplifier. Fans move air over the heatsinks to cool down the power transistors. If these vents are restricted then the amplifier may overheat and shut down. 7. SPEAKER OUTPUTS In bridged-mono mode, do not use a speaker impedance less than 4 ohms. Be careful as both speaker wires are live. Do not connect the speaker wires to any external device that is grounded. 8. COMBO INPUTS These combination inputs allow you to connect balanced XLR plugs or 1/4" plugs. The XLR inputs are wired conventionally, with pin 2 hot, pin 3 cold, and pin 1 ground. The 1/4" inputs allow you to connect balanced 1/4" TRS or unbalanced TS plugs from line-level sources. Use balanced connections where possible, as these offer better rejection of noise than unbalanced lines. Use high-quality, three-conductor shielded cable for balanced connections. The better the shield, the better the audio signal is protected from induced EMI and RFI. There are two options for connecting your speakers: binding posts and Speakon connectors. Normally, you would use either the binding posts or the Speakon connectors. Since the connectors are wired in parallel (e.g., channel 1 binding post and Speakon are in parallel, and channel 2 binding post and Speakon are in parallel), you can connect a speaker to each connector, as long as the total impedance per channel is not less than two ohms. 9. THRU OUTPUTS These male XLR connectors allow you to send the balanced input signals to other amplifiers, powered speakers, mixers, or recorders in your system. The linelevel output is a straight copy of what goes in, and the amplifier level controls [4] and switches have no effect. • Two 8 ohm speakers in parallel equals 4 ohms. • Two 4 ohm speakers in parallel equals 2 ohms. When the amplifier is used in bridged-mono mode, use either the center Speakon, or the two red binding posts to connect your single speaker. 5 6 7 FAST RECOVERY POWER AMPLIFIER CHANNEL 2 BRIDGED CHANNEL 1 : WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. : AVIS RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES FOR THE U.S. AND ICES-003, FOR CANADA. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION. DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA FABRIQUE EN CHINE • COPYRIGHT ©2007 "MACKIE", AND THE RUNNING MAN FIGURE ARE TRADEMARKS OF LOUD TECHNOLOGIES, INC. SPEAKER OUTPUTS PIN PIN PIN 1+ 1 BRIDGED 1+ 2+ 1+ 1 PIN CH 2 2+ 2 1+ 1 CH 1 6 88 FILTER SUBSONIC @ 30Hz CLIP LIMIT AMP MODE 99 Owner's Manual