User manual BLUE SKY MEDIADESK 2.1 MONITORING SYSTEM

[. . . ] Blue Sky International 70 Sea Lane Farmingdale, NY 11735 www. abluesky. com MediaDeskTM 2. 1 MonitoringTM System Owner's Manual Version 1R | June 10, 2004 Contents Important 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Safety Instructions _ __ __ __ __ __ __ __ __ __ _ Page 3 MediaDesk Introduction _ __ __ __ __ __ __ __ _ Page 4 Important notes about MediaDesk and this Owner's manual _ __ __ __ __ __ __ __ __ __ __ _ Page 4 2. 1 System - What is included?_ __ __ __ __ __ _ Page 4 Quick Setup _ __ __ __ __ __ __ __ __ __ __ __ _ Page 5 System Signal Connections and Level Settings Page 6 A Tour of the MediaDesk Amplifier and I/O _ _ Page 7 MediaDesk Mounting and Placement Options_ _ Page 8 Expanded Calibration Guide _ __ __ __ __ __ _ Page 9 Subwoofer Placement Guide _ __ __ __ __ __ _ Page 10 Technical Information _ __ __ __ __ __ __ __ __ _ Page 11 Satellite Cabinet Dimensions _ __ __ __ __ __ _ Page 12 Subwoofer Cabinet Dimensions _ __ __ __ __ _ Page 13 Factory Service Instructions _ __ __ __ __ __ __ _ Page 14 General Contact Details _ __ __ __ __ __ __ __ _ Page 14 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. ATTACHMENTS - Do not use attachments not recommended by the product manufacturer as they may cause hazards. [. . . ] Power Switch - Controls the power to all the three amplifiers and all internal electronics. FUSE - Replace with same rating and type for your local voltage rating. For 115V applications use a 4 Amp T 250V and for 230 Volt 12 13 14 applications use a 2 Amp T 250V fuse. IEC 320 RECEPTACLE - Check voltage selector switch before connecting power. Connect to 115 Volt AC / 60Hz power source, rated for 360 WATTS or 230 Volt / 50Hz rated for 360 WATTS. Only use the supplied power cord or an IEC approved power cord without a safety ground pin. Speaker Outputs - These connectors are high quality binding post that are compatible with both bare speaker wire and other speaker connectors (such spades and banana plugs). Please always maintain proper phase and be careful to avoid short-circuits between output terminals. Amplifier Heatsink - The heatsink provides essential cooling to the amplifiers inside MediaDesk. Please ensure that proper air circulation is available for proper cooling. Page 7 7. MediaDesk Mounting and Placement Options Figure 7 Monitor mounting and placement is often an afterthought, but in order to get the best imaging and overall performance from MediaDesk, it is important to place the speakers correctly. Figure 7 shows the ideal placement, with the MediaDesk SAT located perfectly at seated ear height. However, there are many other ways to mount or place MediaDesk, which can work equally as well. Figure 8: Cabinet angled back Most users of MediaDesk will be using the system around or near a computer workstation. The design of the MediaDesk SAT takes this into acount and makes it easy to place the speakers on a typical desk and have them pointed at the user's ears. The angle of cabinet also reduces reflections off of the desk, improving imaging and overall performance. Figure 9: Cabinet level with baffle hanging over This drawing shows the MediaDesk SAT being placed so that cabinet has no up or down angle. This maybe an ideal way to mount the SATs if you are placing them on a shelf that is at seated ear height, or a conventional speaker stand with a flat top. Figure 10: MediaDesk Angle Adjustment Foot The MediaDesk Angle Adjustment Foot alows you to place the MediaDesk SAT on a flat surface and adjust the front baffle angel from 0 degrees (shown in picture) to +5 degrees (baffle angled down). This drawing illustrates the MediaDesk being placed so that the cabinet has no up or down angle. Figure 11: Optional Microphone Stand Adaptor Although not supplied by Blue Sky International, a standard 5/8" x 27 female to 3/8" x 16 male adapter, allows you to adapt the center insert on the MediaDesk SAT so that it is compatible with a standard mike stand, which typically has a 5/8" x 27 fine male thread. Wall Mount Options (not shown) The MediaDesk SAT is compatible with two types of wall mount brackets. The first mounting option is via the 2 1/4 X 20 inserts on the back of the MediaDesk SAT. These inserts are compatible with BT Technologies BT-5 Brackets (www. btech-usa. com). [. . . ] In order to continually improve all of its products Blue Sky reserves the right to change these specifications without notice. MediaDesk 2. 1 Specifications General Specifications Input Impedance (all inputs) 20k Ohms balanced Input attenuator =+12 dBu 52k Ohms balanced Input attenuator =+24 dBu 5k Ohms unbalanced RCA input Common Mode Rejection Ratio 40 dB typical @ 60Hz (balanced input only) Maximum Input Level +12 / +24 dBu balanced (Set by input attenuator) +14 dBu unbalanced Subwoofer maximum output +24 dBu balanced Subwoofer output impedance 200 ohms balanced Amplifier power output Note: Long term power output is limited by the speaker protection circuitry Short term power output 1 channel driven: 65 watts x 1 @ <. 05% THD into 4 ohms @ 1 kHz Short term power output 2 channels driven : 55 watts x 2 @ <. 05% THD into 4 ohms @ 1 kHz Subwoofer power output: 65 watts x 1 @ <. 05% THD into 4 ohms @ 50 HZ Mains voltages: 115/230V 50/60 HZ switchable Maximum power consumption: 380 watts Satellite · Lacquer finished baffle · Low diffraction front baffle design with flush mounted drivers · Solid 3/4" MDF enclosure with 1" MDF baffle · Dimensions: Please see page 12 · Weight 5 lbs. · 1/4"x 20 inserts for attachment of OmniMount · 3/8" x16 insert for attachment to microphone stand with adapter (adapter not supplied) · 4" cast frame Neodymium hemispherical woofer · 1" fabric dome Neodymium tweeter · Fully video shielded · Satellite Low frequency crossover 110 Hz · Tweeter Crossover Frequency 2. 0 kHz The following specifications are measured using the MediaDesk Amplifier · Frequency Response Satellite +/- 2. 5dB 300 to 10 kHz +/- 3. 0dB 110 to 20 kHz · Voltage Sensitivity (at reference gain) -12 dBu = 90dB SPL @ 1M Balanced Input attenuator set to +12 dBu 1 dBu = 90 dB SPL @ 1M Balanced Input attenuator set to +24 dBu 240 mV = 90 dB SPL @ 1M RCA input 4 ohm nominal impedance 8" Sealed Box Subwoofer · Fully video shielded. · Vented motor · Foam surround · Coated non-resonance paper cone · Solid 3/4" MDF construction with 1" MDF baffle · Flush mounted driver · Isolation feet are included. 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