User manual YAMAHA R112

[. . . ] 4 Using a Channel Divider and Subwoofers. 15 ENGLISH Precautions WARNING In case an abnormality occurs during operation · If you notice any abnormality, such as smoke, odor, or noise, turn the power amp off immediately. Remove the power cord from the AC outlet. [. . . ] Even if the amplifier's power output is lower than the speakers' PGM (program) power capacity, the speakers may be damaged when clipping of a high input signal occurs. The following may cause damage to speakers: · Feedback caused when using a microphone. · Continuous high sound pressure level produced by electronic instruments. · Continuous high-power output distorted signals. · Popping noises caused by turning on equipment, or by connecting or disconnecting system components while the amplifier is turned on. Poly Switch All full-range loudspeakers are fitted with a self-resetting poly switch that protects the high-frequency driver from damage caused by excessive power. If a loudspeaker cabinet loses high-frequency output, immediately remove power from the unit and wait for two to three minutes. The should allow the poly switch to reset. Re-apply power and check the performance of the high-frequency driver before continuing with the power reduced to a level that does not cause the poly switch to interrupt the signal. On the R118W/R118WC sub woofer, the Poly Switch protects the woofer and a similar routine should be followed if its output is lost. This product, when used in combination with amplification and/or additional loudspeakers, may be capable of producing sound levels that could cause permanent hearing loss. DO NOT operate at high volume levels or at a level that is uncomfortable. If you experience any discomfort or ringing in the ears, or suspect an hearing loss, you should consult an audiologist. 3 ENGLISH Connection Examples Full-range Connection Each speaker features three input/parallel connectors ­ two 1/4" phone jacks and one Neutrik NL4MP connector. Use either a phone jack or the Neutrik connector to receive input from your sound system/power amplifier. One of the spare connectors can be used to parallel-connect an additional speaker (keeping in mind the impedance considerations mentioned below). ENGLISH Neutrik NL4MP Phones DAISY-CHAINED MIXING CONSOLE L GRAPHIC EQUALIZER L POWER AMPLIFIER L SPEAKER SYSTEMS R R R SPEAKER SYSTEMS Impedance Considerations We do not recommend connecting more than two 8-ohm speakers in parallel. Two parallel-connected 8-ohm speakers have a total impedance of 4 ohms, which is the minimum that should be connected to one amplifier output channel. The R112/R112C, R115/R115C, R12M/R12MC, R15M/R15MC and R118W/R118WC are 8-ohm speakers, and two of these can safely be paralleled on one output. The R215/R215C, however, has an impedance of 4 ohms and should not be parallel-connected with another R215/ R215C or any other model. 4 Using a Channel Divider and Subwoofers Using a channel divider in a multi-way system like the one shown in the diagram can provide superior dynamic range and overall sound quality. The channel divider divides the line-level audio from the preamplifier or mixing console into separate frequency bands that are then sent to separate power amplifiers. The power amplifiers drive speaker systems selected for optimum performance in the corresponding frequency ranges. SPEAKER SYSTEMS CHANNEL DIVIDER LEFT MIXING CONSOLE L TWO-CHANNEL GRAPHIC EQUALIZER L LEFT INPUTS RIGHT R R TWO-CHANNEL POWER AMPLIFIER L L HIGH INPUT RIGHT R TO POWER AMP INPUTS L LEFT LOW RIGHT R R INPUT L R OUTPUT R118W/R118WC SPEAKER SYSTEMS OUTPUT TWO-CHANNEL POWER AMPLIFIER R118W/R118WC Phone Plug Wiring Phone plugs for connection to the phone jack inputs should be wired as shown to the right. [. . . ] · Always suspend the speakers using all three long eye bolts. · Never use the speakers' handles as suspension points. 6 Specifications Model Type Speaker Unit LF HF Frequency Range Power Capacity NOISE* PGM MAX Nominal Impedance Sensitivity Nominal Dispersion Horizontal Vertical 97 dB SPL (1W, 1 m) 90° 40° 40° 90° 1. 7 kHz 480 × 695 × 400 mm 26. 5 kg M10 3points 675 × 450 × 380 mm 24. 0 kg -- 520 × 765 × 470 mm 35. 0 kg Black M10 3points -- -- -- 745 × 490 × 400 mm 30. 5 kg 90° 40° 55 Hz - 20 kHz (­10 dB) 200 W 400 W 800 W 8 ohms 98 dB SPL (1W, 1 m) 40° 90° 90° 40° 1. 5 kHz 520 × 1175 × 600 mm 69. 0 kg 12" Cone R112/R112C R12M/R12MC R115/R115C 2Way Bass reflex 15" Cone 1. 75" v. c. Comp. Driver 50 Hz - 20 kHz (­10 dB) 250 W 500 W 1000 W 15" Cone × 2 R15M/R15MC R215/R215C R118W/ R118WC Bass reflex -- 40 Hz - 20 kHz (­10 dB) 500 W 1000 W 2000 W 4 ohms 35 Hz - 3 kHz (­10 dB) 250 W 500 W 1000 W 8 ohms 97 dB SPL (1W, 1 m) -- -- -- 562 × 811 × 639 mm 49. 5 kg Cross Over Frequency Input Connectors Dimensions (W × H × D) Weight Color Mounting Screw SPEAKON NL4MP × 1, 1/4" Phone Jack × 2 *: EIA RS-426 Specifications and descriptions in this owner's manual are for information purposes only. [. . . ]