User manual BLUE SKY BIG BLUE SAT 12

[. . . ] Blue Sky International 70 Sea Lane Farmingdale, NY 11735 www. abluesky. com Big Blue | SAT 12 Owner's Manual Version 2. 6R | 05. 10. 2006 Contents Important 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Safety Instructions _ __ __ __ __ __ __ __ __ __ _ Page 3 Big Blue | SAT 12 Introduction _ __ __ __ __ __ _ Page 4 Important notes about the SAT 12 and this owner's manual _ __ __ __ __ __ __ __ __ __ __ _ Page 4 What is included?_ __ __ __ __ __ __ __ __ __ _ Page 4 SAT 12 Features Overview _ __ __ __ __ __ __ _ Page 5 A Tour of the SAT 12 Amplifier & Electronics Page 6 & 7 SAT 12 Mounting and Placement _ __ __ __ __ _ Page 8 System Signal Flow & Connections _ __ __ __ _ Page 9 Quick 2. 1 System Setup Instructions _ __ __ _ Page 10 Expanded Calibration Guide _ __ __ __ __ __ _ Page 11 Subwoofer Placement Guide _ __ __ __ __ __ _ Page 12 Technical Information _ __ __ __ __ __ __ __ __ _ Page 13 Measurement Data _ __ __ __ __ __ __ __ __ __ _ Page 14 SAT 12 Cabinet Dimensions _ __ __ __ __ __ __ _ Page 18 Factory Service Instructions _ __ __ __ __ __ __ _ Page 19 General Contact Details _ __ __ __ __ __ __ __ _ Page 19 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. 12. 2. SERVICING - Do not attempt to service this product yourself. Opening or removing covers, including any over bottom or side speaker drivers, may expose you to dangerous voltage or other hazards. [. . . ] Monitoring output A, is the main bass-managed output and goes from the console, to the subwoofer and from there to the 80Hz bass-managed input on the SAT 12. The system also shows monitoring output B from the console being used as a full-range source for the direct / "full-range" input on the SAT 12 (-3dB at 45Hz). When a Big Blue system is configured as above, with two switchable monitoring sources, the user can easily A/B between both a true full-range system (20Hz LF response or better), using bass-managed and a subwoofer(s), or the direct / full-range input (45Hz). Multiple Subs: The diagram above also shows the optional use of multiple subwoofers. Multiple subwoofers can be used to increase SPL and improve the LF response of the system, by placing the subwoofers, so as to smooth out the LF response at the mix / monitoring position. Please note that we recommend that you run the subs in MONO, by using the subwoofer out on the main sub and then feeding the next sub in the chain. We do not recommend running stereo subwoofers, because the LF response in the room will not be as consistent using this method. This is because electrical summation of the LF signals (as is done with bass-management using a mono subwoofer / LF signal), is a very predictable and repeatable way to get consistent LF response. LF phase issues between channels are resolved in the most absolute and accurate way - electrically. Cable and connector wiring Use high-quality, shielded cables to connect your console, workstation or other sources to your Big Blue system. Foil-shielded cables, such as Belden 8451, 8761, or 9501 should do quite well. Other high quality cables are available and those that incorporate better shielding will yield an overall higher noise rejection, lowering your systems susceptibility to external interference. Another important tip to keep in mind when wiring your system is to route all line level cables away from the AC and other power sources, this will reduce the probability of having AC hum emanating from your monitoring system. Page 9 8. Quick 2. 1 System Setup Instructions Blue Sky monitoring systems leave the factory fully calibrated. With the gain control on the SAT 12 set to the reference mark, a 200mV (-11. 7dBu) pink noise signal, with a bandwidth of 500 to 2kHz, will yield 90dB SPL at 1 meter. With the gain on the SUB 12 set to the reference mark, or -9dB on the SUB 15, 100mV (-13. 7dBu) pink noise signal, with a bandwidth of 40Hz to 80Hz, on one of the inputs, will yield 90dB of output at 1 meter. Because most control rooms have some gain at low frequencies a good starting point for the subwoofer level is -3dB from the reference position. If you are using multiple subs, the gain may need to be even lower than this (depends on the acoustics of the studio and the placement of the subs). For more information with regard to the controls, please see the manual that came with the SUB 12 or SUB 15, and page 6 & 7 of this manual [A Tour of the SAT 12 Amplifier & Electronics]. The SAT 12, SUB 12 and SUB 15 are compatible with balanced XLR connectors / cables. The total number of XLR cables needed will depend on the system configuration. However for a basic 2. 1 system, with one sub, you need a minimum of four XLR Cables. . For more information on connecting your system, please see page 9 [System Signal Flow & Connections]. The first step in the installation process is to position the active subwoofer. [. . . ] The low frequency variation is due to the relative distance of the woofer and the microphone changing as the cabinet is rotated, as was noted on page 14. SAT 12 Vertical | On Axis, +/-15, +/-30 Horizontal These curves show that the SAT 12 has very good and symmetrical horizontal dispersion, with a smooth roll-off at high frequencies when off axis, +/-30 degrees. SAT 12 Vertical | Baffle Compensation Measurements These curves show the effects of the various settings of the dip switches for baffle compensation. SAT 12 Vertical | Tweeter Adjustment Measurements These curves show the effects of the various settings of the dip switches for tweeter level adjustment. The scale has been expanded to better detail these changes in tweeter level. Page 15 SAT 12 Vertical | Midrange Adjustment Measurements These curves show the effects of the various settings of the dip switches for midrange level adjustment. SAT 12 Vertical | Woofer Adjustment Measurements These curves show the effects of the various settings of the dip switches for woofer level adjustment. SAT 12 Horizontal | On Axis Response If you compare this measurement to the on axis response in the vertical configuration (page 14), you will note that they are nearly identical. SAT 12 Horizontal | On Axis Vs. Listening Window The listening window is a power average of on axis, +/-15 degrees horizontal and +/-15 degrees vertical and gives an indication of how a speaker performs when you are not directly on axis. Ideally the average should be very close to the on axis response Page 16 SAT 12 Horizontal | On Axis +/- 15 Degrees Vertical The vertical curves indicate a dip around the midrange to tweeter crossover frequency and a slight asymmetry in off axis vertical response. [. . . ]