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Detailed instructions for use are in the User's Guide.
[. . . ] When choosing a power amplifier to use with your speakers, make sure that its power output matches the speakers' power capacity (refer to the Specifications on page 6). 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. Continuous high sound pressure level produced by electronic instruments. [. . . ] Always use an independent safety suspension system as a backup. Take care not to remove both screws from each corner, as the internal bracket will fall inside the loudspeaker. Note: Please use the supplied eyebolts found in the carrying handle of the speaker. If you use any part other than that supplied, be sure it is Load Rated and know that it will be de-rated if not suspended so that the pull direction is in-line. Inspect the other six (6) flathead screws, making sure they are tightened down. For the eight models, S112IV, S112IVS, S115IV, S115IVS, SM10IV, SM12IV, SM12IVS, and SM15IV, use the TS-30, TS-40, TS-80, or TS-90 speaker stand by Ultimate Support System, Inc. When using speaker stands, observe the following precautions to prevent the speaker stands from falling over or the speaker system being dropped. â· Use the speaker stands with their legs fully opened. â· Do not place more than one speaker on the same speaker stand. Remove the speakers from the stands before moving the stands or adjusting their height. Use the TS-30, TS-40 at no higher than 130 cm for the S112IV, S112IVS, SM10IV, SM12IV or SM12IVS and at no higher than 120 cm for the S115IV, SM15IV and S115IVS. â· Use the TS-80 and TS-90 at no higher than 140 cm for all speaker models. â· The top tube of the TS-30 and TS-40 speaker stands has a diameter of 1-1/2", but is tapered to 1-3/8" at the top to fit in the mounting holes on the eight models named. If you should remove the top tube from a stand, be sure to insert it with the narrow end up when reassembling. [. . . ] â· Since the LOW signal polarity is inverted at the crossover point between the LOW and HIGH signals, be sure to reverse the polarity when connecting the SW118IV, SW118IVS input jacks to the power amplifier output jacks. This polarity correction must not be made by reversing the polarity of the connections between the PN90 and the power amplifiers, as doing so will damage the equipment. Please reverse the polarity between the power amplifiers and the SW118IVs, SW118IVSs. [. . . ]
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