User manual RUSSOUND R8DT

[. . . ] Care ­ From time to time you should wipe off the front and side panels and the cabinet with a soft cloth. Do not use rough material, thinners, alcohol or other chemical solvents or cloths since this may damage the finish or remove the panel lettering. Lightning ­ For added protection for the subwoofer during a lightning storm, or when left unattended and unused for a long period of time, unplug it from the wall outlet. This will prevent damage to the subwoofer due to a lightning strike and power-line surges. [. . . ] 10. Cleaning - The appliance should be cleaned only as recommended by the manufacturer. 11. Non-use Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. 12. Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through the openings. 2 R8DT SUBWOOFER INTRODUCTION The Russound R8DT active subwoofer delivers the chest-thumping deep bass sound you want for a supersonic listening experience. Whether it's the asteroids breaking apart in your favorite sci-fi movie or the in-yourface concert experience of a classic rock band performance, the R8DT keeps up its end of the deal in your home theater or audio system. With its built-in amplifier, the R8DT fits into to any system, and is tuned for both stereo music audio and for a home theater surround setup. The R8DT filters out mid- and high-range frequencies by sending bass-only signals to its own amplifier via an active crossover network. DUAL TUNED PORT DESIGN The R8DT subwoofer ports are tuned to provide optimum bass reinforcement for systems designed primarily for home theater entertainment or for music listening. This tuning provides an increase in low frequency output which is more ideal for movies where explosions and other action sounds need greater impact. For music applications, one of the ports is blocked with the included plug. This tunes the enclosure for a flatter response with extended low frequency response. It will produce lower notes and do so more accurately. Placement of subwoofer feet Port Port Woofer The downward-firing 8-inch woofer has a 30mm diameter voice coil and vented pole piece for high power handling and more efficient operation. Placement of subwoofer feet Subwoofer bottom (feet removed) 3 R8DT SUBWOOFER 1 2 3 4 5 6 7 8 1 Volume Level Adjustment: Increase or decrease the output level relative to the incoming signal. Crossover: Provides active filtering of the incoming signal to allow only lower frequencies to be amplified. Power Auto, On and Off: Auto setting - amplifier turns on when audio is detected. Low-Level Line Input: Left and Right channel RCA connections for low-level audio signal feed. 6 2 3 Speaker Level Input: (with passthrough) Springloaded terminals for up to 12 gauge speaker wire. Allows input connections to be sourced from an amplified speaker signal such as the Left and Right output from an amplifier/receiver. This amplified signal is tapped off for feeding the subwoofer but the signal is unaltered and is passed directly on to adjoining output terminals Speaker Level Output: Spring-loaded terminals accept speaker wire up to 12 gauge in size. Output terminals feed audio to the speakers which would otherwise be directly connected to the amplifier/receiver's main Left and Right outputs (those connected to the speaker level inputs). Power: Molded power cord for 120V 60Hz 1. 0A power supply. 7 4 5 8 4 R8DT SUBWOOFER CONNECTIONS When you make connections make sure the power switches of all components are off, including the subwoofer. Audio Cables If you are connecting your subwoofer into a system made up of separate components (preamps and power amps), you will need audio cables long enough to reach the subwoofer from the preamplifier and the power amplifier. Speaker Wire Typical speaker wire has a pair of separate conductors with insulating jackets that are molded together. We recommend that you use 16-gauge wire for connecting the receiver to the front speakers. Polarity All speakers in a system must be connected with the same polarity. Speaker wire is marked for polarity so that you can identify which wire is the pair is which. Polarity is shown by a color strip on the insulation, by ridged molded into the insulation or be the colors of the wires, one copper and one silver. [. . . ] The crossover point and the volume level may be retuned to compensate for slight changes that may be needed. ADJUSTMENTS To start, set the crossover control to its center position. This adjustment selects the frequency where the audio will start to be filtered out. The higher the setting, the more signal range will be allowed, increasing output along with frequency range. Too high a setting can cause poor sound if the subwoofer is covering frequencies that are not in need of reinforcement, e. g. , main speakers and subwoofer covering the same range may create undesirable levels of mid bass notes. [. . . ]