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Turbosound TA-880 user manual Long Speaker Lines, The Cooling System

Models: TA-880

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Long Speaker Lines

user manual

TA-880

Long Speaker Lines

Whenever loudspeakers are connected to power amplifiers by long cables (above 20'/6m), there is invariably an increased risk of high frequency instability. It is aggravated by the combination of RF pickup in unshielded cables acting as aerials, and multiple complex reactances in the cable and loudspeakers.

High frequency instability can be avoided by adopting these common sense rules:

Ensure the input wires are shielded and that the shield is connected to the amplifier's input XLR pin 1.

Do not run output cables next to input signal lines. Keep apart, and preferably cross at right angles. If cables have to follow a similar route or path, keep them separated by at least 2 feet (0.6m).

The Cooling System

The cooling fans respond to temperature sensors within the unit to maintain a safe operating temperature. In the event of excessive temperature, the protection circuit will operate, disabling the output. The red ‘AUDIO-PROTECT’ (A/P) LED will indicate this condition. (See fault indicator.)

There are 4 fans connected permanently with variable speed and a jumper link to enable them from cold.

Normal dynamic signals will not cause the amplifier to overheat unless the ventilation is inadequate. (See installation section and maintenance section.)

TA-880 user manual Page 82

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Turbosound TA-880 user manual Long Speaker Lines, The Cooling System

Contents

Tel +44 01403 711447 Fax +44 Star Road, Partridge GreenWest Sussex RH13 8RY England ASPECT TA-880SYSTEMTA-880 TA-880 Features TA-880General Features & Facilities TA-880EC DECLARATION OF CONFORMITY TA-880INTRODUCTION Turbosound Aspect System Concepts TA-880The Aspect Polyhorn Concept TA-880Aspect TA-880Turnkey System Concept TA-880Amplifier Racks The Loudspeaker Management System LMS ConceptLMS-D26/D6Loudspeaker Management Systems TA-880Aspect Loudspeaker Components Power AmplifiersDigital Controllers TA-880TA-880HMid/High Enclosure TA-880LLow Frequency EnclosureTSW-218Subwoofer TA-880TA-880LM Low-MidEnclosure TA-880HM High-MidEnclosureTA-880 Transportation TA-880Aspect trapezoidal Flying System TA-880FLYING AND STACKING Overview TA-880GIGMATE ACOUSTIC SIMULATION TA-880Audience Area System SetupMapping Properties RiggingDesigning a system TA-880TA-880 Now select the number of cabinets deep that you wish to hang or stack in the “Box Count” dropdown. Trim height, or PA wing height can now be set in the “Position” fieldTA-880 TA-880 The Audience Area graph at the bottom of the window shows the SPL, as specified in the SPL Mapping lists, on the selected Audience Area. The selected area is highlighted in the main window and the graph is repeated onto op each area, Selecting the “Combined Level View” tab will show the SPL across all areas simultaneouslySafety Notes on Rigging TA-880TA-880 Sample Certificate of Load TestRequired Horizontal Coverage FLYING HARDWAREHorizontal Coverage Number of ColumsVertical Coverage Wide and Narrow Flybar settingsTA-880 Two-widetrapezoidal flybar FB-880/2W TOPVIEWBOTTOM VIEW TA-880TOPVIEW Three-widetrapezoidal flybar FB-880/3WTA-880 BOTTOM VIEWSHORT CHAIN ASSEMBLY Flying ChainsFC-880 CHOKED CHAIN ASSEMBLY FC-880S TA-880Flying Swords SW-880HFLYING SWORD SW-880HMFLYING SWORD BB AASW-880LMFLYING SWORD TA-880TA-880 Tilting Strap0.59m TA-880 TA-880 TA-880 TA-880 3.Position the second cabinet directly underneath the first. Fit a BS-780biscuit into the top kelping braket of the lower cabinet to keep the backs of the boxes and act as the hinge. Lower the top cabinet and feed the swords into the sword boxes. Make sure that the biscuit engages into the bottom kelping bracket slot of the upper cabinet. The lower end of the swords will be visible through the handle boxes of the lower cabinetTA-880 Sword hole positionInter-cabinetangle A B BSingle horizontal row Flying a cluster of TA-880trapezoidal cabinetsTA-880 4 x SL-880safety linch-pin 2 x TS-890tilt strap 2 wide x 2 deep TA-880Harray4 x FC-880choked chain assembly TA-88030x SL-880safety linch-pin 3x TS-890tilt strap 3 wide x 3 deep TA-880Harray6 x FC-880choked chain assembly TA-880Tight-packedFlying Assemblies TA-880TA-880 Aiming - directivity of the stack Bass Enclosure arrayingTA-880 Ground stacking TA-880Introduction Mechanical InstallationLMS SERIES LOUDSPEAKER MANAGEMENT SYSTEMS UnpackingLMS-D6LOUDSPEAKER MANAGEMENT SYSTEM TA-880LMS-D6Rear Panel Functions Mains PowerTA-880 AC Power Fusing Voltage SettingsSafety Earthing Powering UpAudio Connections Input and Output Connector WiringTime correction for loudspeaker driver placement TA-880LMS-D24AND D26 LOUDSPEAKER MANAGEMENT SYSTEMS FeaturesTA-880 TA-880 Front Panel FunctionsInput Signal Indicators Channel Select buttonsTA-880 for the current input or outputSerial Comms Port Audio Output Connectors Rear Panel FunctionsExpansion PortSecure Mode Switch Power Inlet Audio Input ConnectorsCreating a Crossover Selecting a Factory PresetOperating the LMS-D24and D26 Starting up TA-880a b c LMS-D26Navigation and Viewing Parameters TA-880TA-880 LMS-D26Navigation Out1 Freq Width Gain EQ1 100Hz 1.4Q 0.0dBPreset Recall Preset NamePresets RecallNAME PRESET Preset StorePreset TA-880Stereo / Mono Formats DSP Processing Layout Input DSP block diagramOutput DSP block diagram TA-880DSP processing Input Channels In A Delay 1.50msIn A Gain 0.0dB TA-880HPF 20.0Hz LR24 In A FreqShape TA-880EQ1 100Hz SlopeGain 12dBOut1 Gain Pol 0.0dB Rev Out1 Delay 1.50msDelay Output Channels Gain and PolarityTA-880 Out1 Freq Shape LPF 2.50k LR24High and Low Pass Filters LMS-D26TA-880 Out1 Freq Slope Gain EQ - 100Hz 12dB 0.0dBOut1 Freq Width Gain EQ1 100Hz 1.4Q 0.0dB LMS-D26Limiters Out1 Thresh LIM 4.0dBOut1 Source Inp A RoutingTA-880 Util Screen ParaEQ 100% BW=QUtilities Utility functions LMS-D26Switch Power InletSerial Comms Port Audio Output Connectors ConnectorsRacking, Cables and Connections AMP-890Aspect System Amplification RackTA-880 Input Connections OptionsTA-880 Output Connections Figure 1. Amplifier Rack Signal WiringTA-880 TA-880 Figure 2. Mid-HighOutputsFigure 3. Bass Outputs CHANNEL 1 HFTA-880 Break-outCables - NL4 bassSOCAPEX PIN NUMBERS 17,18,19 NOT USED TA-880 Break-outcables - NL8 mid-highExtension Cables SOCAPEX PIN NUMBERS17,18,19 NOT USEDMains Connections TA-880General Features & Facilities TA-880TA-880 Front Panel Functions T-25Ch. A Front Panel Functions T-45 TA-880Powering Up Mechanical InstallationMains Power Safety EarthingAudio Connections & Controls Voltage SettingVoltage Range TA-880Input Impedance Gain and Sensitivity SettingsPolarity TA-880TA-880 Attenuation & Gain SettingDamping Factor Output ConnectionsThe Cooling System Long Speaker LinesTA-880 TA-880H APPENDIX A TECHNICAL SPECIFICATIONSTA-880 TA-880HMTA-880L TA-880TSW-218 APPENDIX B WARRANTY TA-880West Sussex RH13 8RY United Kingdom Turbosound Limited Star Road Partridge GreenTA-880