User manual BLUE SKY SUB 8 UNIVERSAL MK III

[. . . ] Blue Sky International 70 Sea Lane Farmingdale, NY 11735 www. abluesky. com 100-Watt compact subwoofer with adaptive x-over Blue Sky | SUB 8 Universal Owner's Manual MK III Version 1 | 1/19/2010 Contents Important 1 2 3 4 5 6 7 8 9 10 11 12 Safety Instructions _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 3 SUB 8 Universal MK III Introduction _ _ _ _ _ _ _ _ _ _ Page 4 Important notes about the SUB 8 Universal MK III and this Owner's manual _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 4 SUB 8 Universal MK III - What is included? _ _ _ _ _ Page 4 Quick Setup / with filter setting instructions _ _ _ Page 5 System Signal Connections _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 6 A Tour of the Amplifier and I/O _ _ _ _ _ _ _ _ _ _ _ _ Page 7 Expanded Calibration Guide _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 8 Subwoofer Placement Guide _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 9 Technical Information _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 10 SUB 8 Universal MK III Cabinet Dimensions _ _ _ _ Page 11 Factory Service Instructions _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 12 General Contact Details _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Page 13 Contents Safety Instructions 1 READ INSTRUCTIONS - Read all safety and operating instructions before operating this product. RETAIN INSTRUCTIONS - Retain these safety and operating instructions for future reference. HEED WARNINGS - Follow all warnings on this product and in the operating instructions. [. . . ] Please ensure that proper air circulation is available for proper cooling. VARIABLE CUTOFF FREQUENCY CONTROL KNOBS - These controls are for adjusting the dual 24dB per octave low and highpass filters. It is recommended that the SUB 8 Universal MK III filters be set one octave above the natural roll off of the nearfield monitors that are being used with the SUB 8 Universal MK III. To activate these variable filters, the VARIABLE / SAT 5 FILTER SWITCH - must be in the up position (VARIABLE). For more information see item 10 on page 4 [Quick Setup / with Universal MK III filter instructions]. SUB GAIN - This knob controls the input sensitivity of the subwoofer amplifier only. When set to the reference position a 100mV signal at the input equals 90dB output at a meter. SUB Out - This balanced XLR output can feed additional subwoofers for increased bass performance and should be connected to the SUB IN of an additional Blue Sky SUB 8 / SUB 8 Universal MK III. The output contains the summed low passed subwoofer output and the SUB IN audio. SUB IN - This XLR input can be connected to either the subwoofer output of an external bass-management controller, or the "daisychain" output of a SUB 8 / SUB 8 Universal MK III. This input is fullbandwidth (up to approximately 200Hz) and does not use a low pass filter. Page 7 7. Expanded Calibration Guide move the output faders. Step 3 Mute everything and make sure the 1kHz tone is OFF . Instructions for electroacoustic calibration of a 2. 1 audio system using a SPL meter and Blue Sky's test files. Before starting this procedure you will need to download BlueSkyTestFiles. zip (an 18 MB zip file) by going to www. abluesky. com/calibration. To download the test file, "Right Click" and select "Save Target As". Once downloaded, either burn the test files to a CD or import them into your DAW and follow the instructions below. 2. 1 Monitoring System SPL Meter - such as the SPL meter sold by RadioShack in the U. S. BlueSkyTestFiles. zip Includes 4 files: · · · · 1000Hz SINEWAVE -20dBFS. wav ­ a 1kHz file recorded at 20dBFS for electrical calibration 40-80Hz PINK NOISE -20dBFS. wav ­ a 40Hz to 80Hz bandwidth limited pink-noise file recorded at -20dBFS 500-2. 5kHz PINK NOISE -20dBFS. wav ­ a 500Hz to 2. 5Hz bandwidth limited pink-noise file recorded at 20dBFS Pink Noise full bw -20dBFS. wav ­ a full-bandwidth pink-noise file recorded at - 20dBFS Step 4 Now that the system has been electrically calibrated turn ON your 2. 1 System (SUB 8 Universal MK III & nearfield monitors). Step 5 Assign the 500-2. 5kHz pink noise signal to the left channel only. Make sure there is nothing coming from the right channel (or any other channels). Because this signal is bandwidth limited, you don't have to worry about turning the sub off. If you have a master monitor level control, you can set the sat gain control at reference and then adjust the monitor gain control for 85 dBC. The other method is to set master monitor level to the position you want as a reference level and then use the volume controls to set 85 dBC. [. . . ] You are not just listening for the most boom, but rather where the bass is most accurate and natural sounding. Remember, because the subwoofer is basically omnidirectional, the best spot for the subwoofer can be next to, or even behind, the main monitoring area. After finding the spot where the subwoofer has the best response in the room, place the subwoofer in that location. Now, listen from the main position and confirm that the subwoofers response is similar to when the positions were reversed. [. . . ]