Turbosound LMS-D24, LMS-D26, LMS-D6 - page 41

user manual

TA-890

TA-890 user manual

Page 41

Whilst several manufacturers have attempted to solve this using DSP based systems at

present there is not a working solution in the market.

In theory by splitting the LF energy into several bands and then spacing the left/right stacks

differently depending on frequency this effect can be solved or at least minimised. However,

due to the available space within a venue and the maximum roll-off available from common

crossover systems we consider this to be neither effective or practical.

If a large system is going to be configured with left and right bass stacks it can be preferential

to stack the bass bins in a wide fan with the onstage column flush and parallel to the stage

and with a large distance between the left and right stacks. This ensures each bass array has

some pattern control. Angling individual columns outwards also helps to minimise the

cancellation effects detailed above.

There are several ways of minimising cancellation problems, involving different numbers of

enclosures and different stacking options.

Creating Directional Bass arrays:

It is possible to build bass arrays which provide an amount of horizontal pattern control and

also go some way to solving the problem of multiple summation and cancellations on a large

system. All the examples detailed below presume that the enclosures are placed in free space

and are therefore not effected by the constraints of a venue.

Bass in a line:

The above balloon shows the pattern control given by spacing units ¼ of a wavelength apart

@ 50Hz (5.5ft apart).

Contents

Main Page Page Page Page EC DECLARATION OF CONFORMITY Page Page TA-890 TA-890 user manual Page 9 ASPECT TA-890 TURNKEY SYSTEM CONCEPT The Loudspeaker Management System (LMS) Concept LMS-D24, LMS-D26 and LMS-D6 Loudspeaker Management Systems Amplifier Racks Power Amplifiers Digital Controllers Aspect Loudspeaker Components TA-890L Low Frequency Enclosure TSW-218 Subwoofer TA-890H Mid-high Enclosure Page Transportation Page FLYING AND STACKING Overview GIGMATE ACOUSTIC SIMULATION Setting up a Venue - Overview Page Page Designing a system Page Page Page Page Safety Notes on Rigging Page Flying Hardware Wide and Narrow Flybar Settings Page TO P VIEW BOT TOM VI EW BOTTOM VIEW TOP VIEW 4m 0.59m Three-wide hang using MB-890, EB-890, FB-890/2A and FB-890/1A Page Page Page Page TA-890 user manual Page 37 Attaching the Tilt Straps Fig 1 attach buckle Figure 2 take up slack Page Page Page Page Fanned bass Bessel Array General observations of long lines of bass Page Summing up Ground stacking Page LMS-D6 Front Panel Functions LMS-D6 Rear Panel Functions Mains Power Voltage Setting Safety Earthing AC Power Fusing Powering Up Audio Connections Input and Output Connector Wiring Time correction for loudspeaker driver placement Page Front Panel Functions Page Rear Panel Functions Page Navigation and Viewing Parameters LMS-D26 In A Freq Width Gain EQ1 100Hz 1.4Q 0.0dB cba abc Navigation Out1 Freq Width Gain EQ1 100Hz 1.4Q 0.0dB CHANNEL EDIT Preset Recall LMS-D26 Preset Name Recall 32 My System a abc SELECT PRESET TO RECALL Preset Store Preset Name Store 32 My System c b DSP PROCESSING LAYOUT Input DSP block diagram Output DSP block diagram Stereo / Mono Formats DSP PROCESSING Input Channels LMS-D26 In A Gain 0.0dB abc a LMS-D26 In A Freq Shape HPF 20.0Hz LR24 abc a b Parametric Equalisation In A Freq Slope Gain EQ1 100Hz 12dB 0.0dB abc a b c Parametric filters Out1 Gain Pol 0.0dB Rev abc a b Delay Out1 Freq Shape LPF 2.50k LR24 abc a b Parametric Equalisation Out1 Freq Slope Gain EQ>- 100Hz 12dB 0.0dB abc a b c LMS-D26 Out1 Thresh LIM 4.0dB abc a Routing Util Screen ParaEQ 100% BW=Q ab c Rear Panel Functions AMP-890 ASPECT SYSTEM AMPLIFICATION RACK Racking, Cables and Connections Options Input Connections Figure 1. Amplifier Rack Signal Wiring RSTU } } CHANNEL B DCBA EFGH MN P Q J V Figure 2. Mid-High Outputs NL8 P IN NO . CHANNEL 2 BASS B CHANNEL 1 BASS B CHANNEL 2 BASS A SOCAPEX PIN NUMBERS 17,18,19 NOT USED FANOUTS CAN BE SUPPLIED TO EITHER CONNECT 6 OR 8 CABINETS TO TWO AMPLIFIER S Break-out cables NL8 mid-high SO C APEX PIN N SO Mains Connections T-25 AND T-45 HIGH EFFICIENCY AUDIO POWER AMPLIFIERS General Features & Facilities Front Panel Functions T-25 Front Panel Functions T-45 Mechanical Installation Mains Power Powering Up Safety Earthing Voltage Setting Voltage Range Audio Connections & Controls Polarity Input Impedance Gain and Sensitivity Settings Attenuation & Gain Setting Output Connections Damping Factor Long Speaker Lines The Cooling System MAINTENANCE Page To rotate the horn moulding from B mode to A mode Removal of the high frequency driver TA-890 TA-890 user manual Page 89 Removal of the high-mid frequency driver TA-890 TA-890 user manual Page 90 Removal of the low-mid frequency drive units General Maintenance Flying hardware Paintwork Page TECHNICAL SPECIFICATIONS WARRANTY