User manual POLK AUDIO RM7500

[. . . ] RM SERIES RM7500 Instruction Manual 5601 METRO DRIVE, BALTIMORE, MARYLAND 21215, USA, 410-358-3600, FAX: 410-764-5266 http://www. polkaudio. com RM7509-1 A WORD FROM MATTHEW POLK GETTING STARTED Dear Music Lover, Thank you for choosing Polk's RM7500 Home Theater System. Designing and building speakers is more than just a business for the people at Polk Audio--it is our passion. In addition to these loudspeakers, we make a complete line of stereo, multimedia and automotive loudspeakers so you can assemble the high performance sound system of your dreams in your home, office and car. We encourage you to pursue your audio vision. [. . . ] Disconnect the other speakers in the system so that all you can hear is the subwoofer. Play music or a movie with vocal content. If you can hear and understand the words, your output jack is not filtered, in which case you want to use one of the (line level) "in" jacks on the sub- woofer itself. If all you can hear is bass, and the vocals are not at all or barely audible, then your subwoofer input jack is filtered and you should use the subwoofer's "LFE/Subwoofer In. " EASIEST HOOK UP OPTION FIGURE 5 (Refers to Hook Up Option #1 on Chart, Pages 6-7) FIGURE 6 (Refers to Hook Up Option #2 on Chart, Pages 6-7) 2 Alternate Hook-Up Option* * To determine proper input jack for your system, see "Your Subwoofer Output: Filtered Or Unfiltered?" (above). 8 9 AC POWER The subwoofer has a built-in power amplifier and must be plugged into a standard household 110-120V AC power source in order to operate. The power switch has three positions: "On, " "Off, " and "Auto" (Figure 9, page 13). In the "Auto" position, the amplifier will automatically turn on, and the green pilot light on the front of the subwoofer will illuminate as soon as the speaker senses a signal coming from your electronics. The amplifier and the green pilot light will turn off approximately 15 minutes after input signal ceases. In the "On" position, the power amplifier will operate and the green pilot light will illuminate until the switch is set to "Off" position or the AC cord is disconnected from a power source. (Refers to Hook Up Option #4 on Chart, Pages 6-7) We recommend using the "Auto" position. Turn it to "off" if the system will not be used for extended periods of time, such as during vacations. FIGURE 7 (Refers to Hook Up Option #3 on Chart, Pages 6-7) FIGURE 8 3 4b 10 11 ADJUSTING THE POWERED SUBWOOFER The specially finished PSW650 Powered Subwoofer included in your RM7500 System features two 10-inch direct radiating drivers, 250-watt power amplifier, and dual Power Port bass ports. It offers a wide range of setting options. To perfectly optimize this subwoofer we recommend the following settings as starting points, but the option that is best for you depends on your electronics, main speakers and personal taste. Have someone else switch between the two settings while you sit in your favorite listening position. Use music with good bass (preferably "plucked" string bass) and a deep male vocal. When you hear the best balance of deep bass and natural lower octaves of the male voice, you have achieved optimum phase tuning. SWITCHABLE PHASE ALIGNMENT (Figure 9) In most cases, this switch should be set to "0. " If you have hooked up your subwoofer from a subwoofer output or pre-out jacks and cannot get enough bass output even with the subwoofer level control turned all the way up, switch to the +3dB position. In typical systems where the 3dB boost is not needed, this switch can be useful for providing a quick boost for bass-shy program material. Most people prefer more bass output for movies than music so you can use this switch as a handy way to adjust bass levels as you switch between movie to music sources. +3dB BASS BOOST HIGH PASS CROSSOVER-- SPEAKER LEVEL (Figure 9) Most systems will sound best with the toggle set to "Full Range. " The "80 Hz" setting is recommended only if you frequently play your system at extremely high levels and prefer hook-up options 2 (a & b). Adjust variable low pass upward if you make use of this feature. Generally, turning the knob "up" (clockwise) will add more "warmth" to the bass and lower midrange, possibly at the sacrifice of bass "tightness" and midrange clarity. Conversely, turning the knob "down" (counter clockwise) will make the bass and lower midrange sound "thinner. " FIGURE 9a FIGURE 9 5 12 13 Q. BECAUSE IT DOESN'T KNOW THE WORDS. SAFE LIMITS OF OPERATION This is what passes for humor in the audio business. Here's the real answer: If you have any electrical (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. A very common ground loop source is cable TV. Disconnect the coaxial cable from your TV and/or VCR. [. . . ] All implied warranties on this Product are limited to the duration of this expressed Warranty. Some states do not allow limitation on how long an implied Warranty lasts, so the above limitations may not apply to you. This Warranty gives you specific legal rights, and you also may have other rights which vary from state to state. This Warranty applies only to Products purchased in the United States of America, its possessions, and U. S. [. . . ]