User manual INFINITY TSS-SUB400O

[. . . ] TSS-4000 TOTAL SPEAKER SOLUTIONS TSS-SUB4000 Owner's Guide (120V) IMPORTANT SAFETY PRECAUTIONS READ FIRST! 12. Use only with the cart, stand, tripod, bracket or table specified by the manufacturer or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. Unplug this apparatus during lightning storms or when unused for long periods of time. [. . . ] At this level, frequencies below 100Hz can cause doors, windows, furnishings and other objects in the room to vibrate. This frequently results in clearly audible buzzes and/or rattles that come and go as each test tone plays. Measurement Template 7 TSS-SUB4000 Each of the following tracks produces a low-frequency test tone. The range of these tests is from 100Hz down to 20Hz. The frequency of each test is announced before it begins. The first test is the highest frequency (100Hz); therefore, you will be marking the template from right to left. Each frequency point is listed across the bottom of the Measurement Template (this is called the X-axis). See Figure 7 on the previous page. The vertical scale on the left side of the template indicates relative level, in dBs (the Y-axis). The template's vertical scale matches that of the RSLM bar graph. From now on, you will want to keep your CD player's remote control handy. EXAMPLE:The test frequency is 100Hz and the level indicated is ­2dB. See Figure 8. When finished, press Skip >>I to advance to the next test. When you have completed the 23 measurements, you are ready to analyze the data and make corrective adjustments. The completed Measurement template will look something like the example in Figure 10. Figure 10. Locating a test point It takes a few seconds for the RSLM reading to stabilize, especially at very low frequencies. At the bottom of the bar graph is a green "ON" LED. This LED is illuminated whenever the sound level is below the measuring range of the RSLM. If this occurs during a test, place a dot at the intersection of the test frequency and the bottom frame of the template. See Figure 9. Figure 11. Test example with dots connected Figure 9. Indicating an under-range test TSS-SUB4000 8 At this point, you may simply enter the data you just measured into the R. A. B. O. S. calculator, found on the Infinity Web site at www. infinitysystems. com. Skip to page 14 and adjust these controls as described, and finish the R. A. B. O. S. settings, simply continue following the instructions from this point. STOP Width The frequency range of the R. A. B. O. S. equalizer may be set from 5% to 50% of an octave in 21 steps. This setting defines how much of the TSS-SUB4000's output will be equalized. What Does a Parametric Equalizer Do? The R. A. B. O. S. system uses one band of parametric equalization for response correction. Parametric equalizers are the most versatile class of filters. The effect an equalizer will have on the signal is dependent on three parameters. Frequency: The equalizer will have maximum effect at one frequency, usually described as the center frequency. Level: This refers to the amount of cut (in dBs) the equalizer is set for. [. . . ] Ideal Response: If your test data looks similar to the example in Figure 22, you have a very favorable setup. Skip to the "Final System Balance" section, page 15. Adjusting the R. A. B. O. S. Equalizer Now that you have performed the measurements and interpreted the data, you have the information needed to adjust the subwoofer's equalizer. Therefore, Position 1 is the full counterclockwise position. The following table illustrates all switch positions. [. . . ]