Turbosound LMS-D6, LMS-D24, LMS-D26 user manual Attenuation & Gain Setting, Damping Factor

Page 84

user manual

TA-890

The gain should be set to match the signal from the source, e.g. mixer, controller, or equaliser.

Attenuation & Gain Setting

The front panel gain controls allow precise level settings, and may be used to adjust the relative levels of sections of a large system, for example downfills or side seating cover in an arena.

The front panel gain controls are also useful when initially checking a system after it has been connected up.

Note that in BRIDGED mode only the Channel A control is active.

Output Connections

A Speakon NL4 connector is provided on each channel.

Damping Factor

The T series amplifier outputs provide a high damping factor, typically 400 times at low audio frequencies. This damping helps the amplifier to control the loudspeaker drive units, provided that the resistance of the intervening cables and connectors is very low. The sonic benefits of high damping factor are most pronounced at bass and low-midrange frequencies (i.e. 10 to 600Hz) providing a subjectively tighter sound as a result of the improved reproduction of transients.

Amplifier damping factor is degraded by high resistance in the loudspeaker circuits; i.e. thin conductors, long output cable runs and tarnished, corroded or loose connections.

Damping factor is maximised by installing cables containing conductors of large cross- sectional area, and by specifying connectors with heavy-duty contacts and waterproof covers. The cable sets supplied with Aspect systems are manufactured to a high specification with these considerations in mind.

TA-890 user manual Page 84

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Contents Aspect TA-890 System TA-890 TA-890 TA-890 Amplifier Rack Signal Wiring Output Connections EC Declaration of Conformity ProductsIntroduction Turbosound Aspect System ConceptsTurbosound Polyhorn TA-890 Aspect TA-890 Turnkey System Concept Power Amplifiers Loudspeaker Management System LMS ConceptLMS-D24, LMS-D26 and LMS-D6 Loudspeaker Management Systems Amplifier RacksDigital Controllers Aspect Loudspeaker ComponentsTA-890L Low Frequency Enclosure TSW-218 Subwoofer TA-890H Mid-high EnclosureTA-890 Transportation Aspect Flying Systems Flying and Stacking OverviewSetting up a Venue Overview Gigmate Acoustic SimulationRunning Turbosound GigMate / Ease Focus for the first time System Setup Designing a system TA-890 TA-890 Changing the system Theatre-style venue 3-wide flown cluster @ 1kHz Safety Notes on Rigging Sample Certificate of Load Test Wide and Narrow Flybar Settings Flying HardwareSingle A-System Flybar FB-890/1A TOP View Bottom View Figue 3. Triple ‘A’ System Flybar FB-890A/3W FC-890 Flying Chains TS-890 Tilting StrapsTA-890 Four-wide hang using MB-890 and FB-890/2A Integral Flying Hardware ‘A’ System FlygearConnecting Flying Chains to the Cabinet Connecting Cabinets ‘A’ SystemDrop Link Swing LatchSetting Vertical Angles ‘A’ System Attaching the Tilt Straps Attach buckleTurbobass Directivity Bass Enclosure arrayingAiming directivity of the stack TA-890 Typical Left to Right problem ABC DEFCreating Directional Bass arrays Bass in a lineFanned bass Bessel Array General observations of long lines of bassEnd firing array Summing up Ground stacking General features & facilities Unpacking Mechanical InstallationLMS Series Loudspeaker Management Systems IntroductionLMS-D6 Front Panel Functions Mains Power LMS-D6 Rear Panel FunctionsVoltage Setting Safety EarthingAC Power Fusing Powering UpInput and Output Connector Wiring Time correction for loudspeaker driver placementAudio Connections Features LMS-D24 and D26 Loudspeaker Management SystemsFront Panel Functions TA-890 Rear Panel Functions Selecting a Factory Preset Operating the LMS-D24 and D26Starting up Creating a CrossoverA Freq Width Gain EQ1 100Hz 1.4Q 0.0dB Navigation and Viewing ParametersOut1 Freq Width Gain EQ1 100Hz 1.4Q 0.0dB NavigationPreset Recall PresetsPreset Name Store My System Preset StoreInput DSP block diagram Output DSP block diagramDSP Processing Layout Stereo / Mono FormatsDSP Processing Input ChannelsA Freq Shape HPF 20.0Hz LR24 Parametric Equalisation High and Low shelving filtersParametric filters Delay Output ChannelsGain and Polarity Out1 Freq Shape LPF 2.50k LR24 High and Low Pass FiltersOut1 Freq Slope Gain EQ- 100Hz 12dB 0.0dB Limiters RoutingUtilities Utility functionsAudio Input Connectors AMP-890 Aspect System Amplification Rack Racking, Cables and ConnectionsOptions Input ConnectionsAmplifier Rack Signal Wiring Output ConnectionsMid-High Outputs Break-out Cables NL4 bass Break-out cables NL8 mid-high Extension CablesMains Connections T-45 High Efficiency Audio Power Amplifiers General Features & FacilitiesFront Panel Functions T-25 Front Panel Functions T-45 Mechanical Installation Voltage Range Audio Connections & ControlsGain and Sensitivity Settings PolarityInput Impedance Attenuation & Gain Setting Damping FactorLong Speaker Lines Cooling SystemMaintenance To rotate the horn moulding from ‘A’ mode to ‘B’ mode To rotate the horn moulding from ‘B’ mode to ‘A’ mode Removal of the high frequency driverRemoval of the high-mid frequency driver General Maintenance Removal of the low-mid frequency drive unitsPaintwork TA-890 Technical Specifications Warranty Serial NumbersTA-890