User manual POLK AUDIO PSW202

[. . . ] IMPORTANT SAFETY INSTRUCTIONS READ BEFORE OPERATING EQUIPMENT These products were designed and manufactured to meet strict quality and safety standards. There are, however, some installation and operation precautions which you should be particularly aware of. Read Instructions--All the safety and operating instructions should be read before the system is operated. Retain Instructions--The safety and operating instructions should be retained for future reference. [. . . ] Insert the bare wire into the hole, and release the plastic tab. Repeat this step for the other terminal (Figure 4). Make sure that the two bare wire ends do not touch each other. Such contact could result in an electrical short and cause your receiver or amplifier to turn off or malfunction. RECOMMENDED HOOK-UP METHOD FOR "SATELLITE" SYSTEMS (FIGURES 5 & 6) Connect the left and right front speaker outputs of your receiver or amplifier to the speaker level inputs of the powered subwoofer with speaker wire. Then, connect the left and right front satellite speakers with speaker wire from the speaker level outputs from the powered subwoofer. If it is more convenient, parallel wire the subwoofer and front satellites from your receiver (Figure 6). Connect the Center Channel Speaker directly to the center channel output from your receiver. R E C E I V E R S E T- U P / B A S S M A N A G E M E N T All surround receivers allow you to "customize" their performance depending on the size of your speakers. Refer to the owner's manual of your receiver or surround processor to learn how this is done. To get the best performance from small "satellite/subwoofer" type systems, use the following settings with the above hook-up method: Front speakers -- set to "large" Center speaker -- set to "normal" or "small" Surround speakers -- set to "small" Subwoofer -- set to "OFF" or "none. But really truly, this is the correct setting for the recommended hook-up method. By setting the front left and right speakers to "Large" and routing them through the subwoofer as instructed above, you deliver a full range signal to the subwoofer's low pass filter. The low pass filter takes the low frequencies and passes the rest on to the front speakers, for perfect sub/sat blending. HOOK-UP METHOD #2 (FIGURE 7) This method can be used with electronics that include a "SUB OUT" feature (Figure 7). It is not recommended for use with RM Series "Sub/Sat" Systems. Connect a single RCA cable from the "SUB OUT" of your electronics to the left and right. Use a "Y" cable to connect the single subwoofer output jack to the two Line Level Inputs of the subwoofer. This input bypasses the subwoofer's variable low pass filter and relies on the filter built into your electronics. If your "SUB OUT" is an unfiltered signal (check your owner's manual), use either left or right "Line Level Input, " to use the low pass crossover in the subwoofer. When using method #2, it is necessary to adjust the settings of your electronics as follows: Front speakers = large or small depending on their output capabiliteis; Subwoofer = "ON". Connect the front left and right preamp outputs from your electronics to the left and right LINE LEVEL input of the subwoofer. [. . . ] Avoid harsh detergents and cleaning fluids, they can permanently damage your speaker's finish. Here's the real answer: If you have any electrical (50/60Hz) hum in your system you're going to hear it clearly as soon as you hook up your subwoofer. most hum problems are caused by "ground loops. " That is, the electrical grounds of the components in your system are not at the same electrical potential. [. . . ]