User manual INFINITY MODULUS II

[. . . ] MODULUS II HOME THEATER SYSTEM ® Owner's Guide IMPORTANT SAFETY PRECAUTIONS Read First! CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: To reduce the risk of electric shock, do not remove cover (or back). CAUTION: To prevent electric shock, do not use this (polarized) plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. [. . . ] If the sound level in the room is below the measurement range of the instrument, a green LED near the bottom of the bar graph will be illuminated. · Normal Measurements: When the sound level is within the range of the RSLM, the green LED will be off and one of the red LEDs in the bar graph will be illuminated, indicating the relative sound level, in decibels (dB). · Over-Range: If the sound level exceeds the range of the meter, 0dB through ­5 will all light simultaneously. · Low Battery: When the battery voltage is too low for accurate measurements, an LED at the bottom of the bar graph will be illuminated. Do not attempt measurements when this light is on. Tracks 53­62 of the R. A. B. O. S. Test CD are test tones that can be used for general diagnostics of your system. They are not used for R. A. B. O. S. Sound-Level Meter (RSLM) The RSLM is a battery-operated, handheld, acoustic measurement device specifically designed for Infinity R. A. B. O. S. On the face of the instrument is a light-emitting diode (LED) bar graph that indicates relative sound level. There are also indicators for power-on, out-of-range signals and a low battery. RSLM Placement Determine where in the room you are most likely to sit when listening to music or watching a movie. This is where you will want to hold the RSLM during measurements. The RSLM should be oriented so it can be easily read and held at your seated ear level during tests. Sound-Level Meter -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -13 -15 -18 U-R Batt FIGURE 12 10 MODULUS II HOME THEATER SYSTEM Initial System-Level Setting The following steps will set the playback level of the system to the correct level for all tests that follow. Cue the R. A. B. O. S. Test CD to Track 2 and press Pause II. This track will produce band-limited pink noise in both the left and right channels. With the RSLM positioned as described above, increase the system volume until the RSLM display indicates ­10dB. Watch for peak readings. The peak reading may be no more than a brief flash. Readjust the subwoofer's Level Control ª until the peak level observed is 0dB without triggering the over-range indication. Adjusting the subwoofer levels for a 0dB peak RSLM indicating the correct system level to begin tests (­10dB) Too Low When you have completed this adjustment, press Pause II. Correct Level Too High FIGURE 15 When finished, press Pause II. FIGURE 14 Performing Low-Frequency Measurements Read the following instructions fully before beginning tests. For the following steps, you will need a Measurement Template and a pencil. measurement template Setting the Subwoofer Test Level Each of the following test tracks is about one minute long. This is normally much longer than required. The objective is to scale the subwoofer's output to make full use of the RSLM indicator range. Scaling is optimum when a 0dB reading is observed on the highest peak without triggering the over-range indication. controls, TM, £ and ¢, set to fully clockwise positions, and all measurements should be conducted with their level controls in this position. Confirm this setting before you begin this test. The Level Control ª should be set to the mid position (5). Cue Track 3 and Pause II. Track 3 continuously steps through all subwoofer test tones for approximately 1 minute. Each tone will play just long enough for the RSLM to give a stable reading. [. . . ] Top to bottom, they are marked "Freq, " "Width" and "Level. " Each control has 21 positions. Therefore, Position 1 is the full counterclockwise position. R. A. B. O. S. TM Controls Freq. Width Level The table below illustrates all switch positions. Position 1 CCW 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 CW F (Hz) 20 20 20 21 22 24 26 30 35 38 40 43 46 49 52 56 63 66 72 77 80 L (dB) ­14. 1 ­13. 9 ­13. 5 ­13. 1 ­12. 7 ­11. 7 ­11. 0 ­10. 2 ­9. 5 ­8. 9 ­8. 3 ­7. 9 ­6. 4 ­4. 4 ­2. 9 ­1. 9 ­1. 1 ­0. 5 0. 0 0. 0 0. 0 W 4. 5% 5% 7. 5% 10% 12. 5% 16. 5% 20. 5% 23% 26% 28% 29. 5% 31% 34% 39% 41. 5% 43. 5% 45% 46. 5% 48% 49% 49. 5% FIGURE 30 18 MODULUS II HOME THEATER SYSTEM Adjust the controls as indicated by the Measurement Template. Each value shown in the table is represented by detents in the R. A. B. O. S. [. . . ]