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user manual

LMS-D24/26

LMS-D2X user manual

Page 22

High and Low Pass Filters

LMS-D26

Out1 Freq Shape

LPF 2.50k LR24

a

b

c

a

b

Knob A: Frequency, <<out, 10.0Hz to 25.6kHz, out>>
Knob B: high pass filter type

Filter type is selectable from Butterworth, Bessel, Linkwitz-Riley and Hardman. Filter slopes of up
to 8th order or 48dB / octave are provided. Not all filter types are available in all slopes. For
example 18dB / octave Linkwitz-Riley filters do not exist.

The Hardman type filter is always described by its’ order as the filter becomes progressively
steeper rather than following a linear slope so a dB/octave description is not accurate.

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Содержание LMS-D24

Страница 1: ...26 DIGITAL LOUDSPEAKER MANAGEMENT SYSTEM USER MANUAL Turbosound Ltd Star Road Partridge Green West Sussex RH13 8RY England Tel 44 0 1403 711447 Fax 44 0 1403 710155 web www turbosound com Version 1 0 Turbosound 4 05 ...

Страница 2: ...ble parameters for the current input or output Parameter Encoders Up to three parameters are shown on the display The parameter name is shown with its current value below Where appropriate parameters are grouped according to function for example centre frequency width and gain for parametric EQ Turn an encoder clockwise to increase the value of a parameter or anti clockwise to decrease it Turning ...

Страница 3: ...nctions 9 Rear Panel Functions 11 Operating the LMS series controller 12 Starting up 12 Selecting a Factory Preset 12 Creating a Crossover 12 Navigation and Viewing Parameters 13 Navigation 14 Presets 15 Preset Recall 15 Preset Store 16 DSP Processing Layout 17 Input DSP block diagram 17 Output DSP block diagram 17 Stereo Mono Formats 17 DSP processing 18 Input Channels 18 Parametric Equalisation ...

Страница 4: ...D24 26 LMS D2X user manual Page 4 Parametric Equalisation 23 Limiters 24 Routing 24 Utilities 25 Utility functions 25 Factory Presets 26 EQ and Filter Response Graphs 27 Technical Specifications 30 Warranty 31 NOTES 32 ...

Страница 5: ... required when the apparatus has been damaged in any way such as the power supply cord or plug is damaged liquid has been spilled or objects have fallen into he apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Regulatory Compliance This product complies with both the EMC Directive 89 336 EEC and the Low Voltage Directive 73 23 EEC as issued...

Страница 6: ...ND products are carefully engineered for world class performance and reliability If you would like further information about this or any other TURBOSOUND product please contact us We look forward to helping you in the near future Unpacking the controller After unpacking the unit please check carefully for damage If damage is found please notify the carrier concerned at once You the consignee must ...

Страница 7: ...ystems In addition limiters delays eq gain polarity and crossover filter controls are accessible to the user in order to match specific operation environments The LMS series crossovers are designed for quick setup and adjustment via easy to use front panel controls Features Minimal signal path design providing exceptional audio quality with carefully optimised processing and high performance conve...

Страница 8: ...eed to know how to drive the front panel A detailed explanation of the front and rear panel controls and indicators is contained in the next section The final section describes each individual function or feature with annotated images explaining its use Where appropriate the LCD is shown to further elaborate on the unit s operation To complete the manual a reference section is included describing ...

Страница 9: ... to name a preset and choose which memory location it will be held in Pressing store button again completes the process The Recall function operates in a similar way pressing the recall button allows the user to select which preset they require pressing the button for a second time then confirming recalls the new DSP settings The unit allows the user to set up user programs with full access to all...

Страница 10: ...n sections The parameter knobs have a fixed association with the screen sections the rightmost parameter knob adjusts the rightmost parameter and so on Output signal and limiter indication two LED s are provided for each output channel These show the signal level relative to the limiter threshold The yellow LED will light when the signal is 6dB below the threshold and the red warning LED will ligh...

Страница 11: ...nd the ground connection of the unbalanced source Audio Output connectors the processed outputs are impedance balanced and are wired pin 1 ground pin 2 hot and pin 3 cold An unbalanced input may be driven by by connecting pin 3 cold signal to the ground connection of the unbalanced destination input Note that output pin 1 s are ground lifted at audio frequencies but connected to ground at RF for g...

Страница 12: ...those settings that are a function of the loudspeaker cabinet design and should not require adjustment for different applications To recall a Factory Preset for a particular cabinet or system press Recall and use the left hand parameter knob A to scroll through the available factory preset locations as indicated by a box symbol after the preset number Once the appropriate preset has been selected ...

Страница 13: ...res parameters A parameter may be adjusted when it is displayed by turning one of the three parameter knobs Each of the three parameter knobs is associated with a zone on the display Adjusting the leftmost parameter knob will change the value of the parameter showing in the leftmost zone of the display and so on Turn a knob clockwise to increase the value of a parameter or anti clockwise to decrea...

Страница 14: ...gation buttons gives access to the various pages of parameters available for each channel The currently selected page is shown in the bottom left hand corner of the display this is omitted on some pages where the function is obvious The screen shows up to three normally related parameters for a given part of the processing functions on a given channel The edit buttons allow you to scroll in either...

Страница 15: ...set number Press the Recall Button again to activate the Preset Pressing any other button will cancel the operation LMS D26 Preset Name Recall 32 My System a b c SELECT PRESET TO RECALL a RECALL RECALL Users can develop their own Preset based on one of the basic or Factory Presets stored within the device Once a basic or user Preset has been recalled a user has complete freedom to adjust any or al...

Страница 16: ... 12 characters in length can be entered using parameter knobs B and C Pressing the Store Button again completes the process and stores the Preset As with Preset Recall pressing any other button cancels the operation LMS D26 Preset Name Store 32 My System a b c SELECT STORE LOCATION a STORE STORE c b NAME PRESET The user can overwrite non protected Presets only if an attempt is made to save a Prese...

Страница 17: ...ety of applications There are two Formats Mono or Stereo With the Mono format all outputs have unique parameter settings and all outputs are identical in terms of processing functions and routing capability This is the most flexible Format Stereo format pairs the inputs and outputs for stereo operation the parameters of each member of the pair being identical The routing of inputs to outputs is fi...

Страница 18: ...26 In A Delay 1 50ms a b c a Knob A Delay adjustable in variable steps from 0 to 400ms The delay parameter is adjustable in fine steps at low values the adjustment becomes progressively coarser as the value increases The velocity sensitive Parameter Knobs therefore provide accurate setting of driver offset delays typically below 10ms and rapid setting of longer system alignment delays ...

Страница 19: ...tering as it affects all outputs and can therefore improve inter band phase relationships Filter type is selectable from Butterworth Bessel Linkwitz Riley and Hardman Filter slopes of up to 4th order or 24dB octave are provided Not all filter types are available in all slopes For example 18dB octave Linkwitz Riley filters do not exist The Hardman type filter is always described by its order as the...

Страница 20: ...z in variable steps Knob B Slope 6 to 12dB octave in 1dB steps Knob C Gain 15dB in 0 2dB steps The frequency is specified as point where the filter deviates by 3dB from the gain value Parametric filters LMS D26 In A Freq Width Gain EQ1 100Hz 1 4Q 0 0dB a b c c b a Knob A Centre Frequency 10 0Hz to 25 6kHz in variable steps Knob B Width display selectable Q or BW Bandwidth BW adjustable from 0 05 t...

Страница 21: ...djustable in 0 2dB steps from 80 dB to 20dB Knob B Polarity selectable normal or reversed with reference to other outputs Delay LMS D26 Out1 Delay 1 50ms a b c a Knob A Adjustable in variable steps from 0 to 80ms As for input delay velocity sensitive Parameter Knobs provide finer adjustment at low levels and rapid selection of higher values ...

Страница 22: ... selectable from Butterworth Bessel Linkwitz Riley and Hardman Filter slopes of up to 8th order or 48dB octave are provided Not all filter types are available in all slopes For example 18dB octave Linkwitz Riley filters do not exist The Hardman type filter is always described by its order as the filter becomes progressively steeper rather than following a linear slope so a dB octave description is...

Страница 23: ...0dB a b c a b c Knob A Frequency 10 0Hz to 25 6kHz in variable steps Knob B Slope 6 to 12dB octave in 1dB steps Knob C Gain 15dB in 0 2dB steps The frequency is specified as point where the filter deviates by 3dB from the gain value LMS D26 Out1 Freq Width Gain EQ1 100Hz 1 4Q 0 0dB a b c a b c Knob A Centre Frequency 10 0Hz to 25 6kHz in variable steps Knob B Width display selectable Q or BW Bandw...

Страница 24: ... high performance low distortion limiter is provided on each output Threshold is user adjustable all other parameters are carefully calculated dependant on configuration to provide clean and effective control of signal dynamics Routing LMS D26 Out1 Source Inp A a b c a Knob A Output source selectable Input A Input B or Sum A B Configures the routing from input to output This function is only avail...

Страница 25: ...n bandwidth The device automatically adjusts for the variations in display contrast as the temperature of the LCD changes The screen contrast utility control sets the base contrast of the screen and also allows optimization for a given viewing angle Parametric equalisation width parameters can be displayed in either Q or bandwidth expressed in octaves LMS D26 Util Screen ParaEQ 100 BW Q a b c ...

Страница 26: ...tive 18 TQ 315 Active TQ 315 low TQ 315 high spare TQ 315 low TQ 315 high spare 19 TQ 315 wedge TQ 315 low TQ 315 high spare TQ 315 low TQ 315 high spare 20 TQ 315 425 TQ 425 left TQ 315 low TQ 315 high TQ 425 right TQ 315 low TQ 315 high 21 TQ 315 sub TSW 718 828 TQ 315 low TQ 315 high TSW 718 828 TQ 315 low TQ 315 high TQ 445 22 TQ 445 Active TQ 445 low TQ 445 high spare TQ 445 low TQ 445 high s...

Страница 27: ... AND FILTER RESPONSE GRAPHS 100 1 10 3 1 10 4 36 30 24 18 12 6 0 6 6dB Oct 12dB Oct 18dB Oct 24dB Oct 48dB Oct Butterworth Frequency Hz Magnitude dB 100 1 10 3 1 10 4 36 30 24 18 12 6 0 6 12dB Oct 24dB Oct 48dB Oct Linkwitz Riley Frequency Hz Magnitude dB ...

Страница 28: ...D24 26 LMS D2X user manual Page 28 100 1 10 3 1 10 4 36 30 24 18 12 6 0 6 12dB Oct 24dB Oct Bessel Frequency Hz Magnitude dB 100 1 10 3 1 10 4 36 30 24 18 12 6 0 6 4th Order 8th Order Hardman Frequency Hz Magnitude dB ...

Страница 29: ...ual Page 29 100 1 10 3 1 10 4 15 10 5 0 5 10 15 Low shelf varying Gain High shelf varying Slope Shelving EQ Frequency Hz Magnitude dB 100 1 10 3 1 10 4 15 10 5 0 5 10 15 Varying Gain Varying Bandwidth Parametric EQ Frequency Hz Magnitude dB ...

Страница 30: ...filter frequency Off 10Hz to 25 4kHz 1 36 octave steps LP filter frequency 10Hz to 25 4kHz and off 1 36 octave steps LP HP filter type 12 18 24dB octave Bessel and Butterworth 12 24 and 48dB octave Linkwitz Riley and 4th or 8th order Hardman Delay Input 400ms output 80ms Limiter High performance limiter adjustable threshold in 0 2dB steps automatic time constants EQ frequency 10Hz 25kHz 1 36 octav...

Страница 31: ...eplace products which prove to be defective provided that the product is returned shipping prepaid to an authorised TURBOSOUND service facility Defects caused by unauthorised modifications misuse negligence act of God or accident or any use of this product that is not in accordance with the instructions provided by TURBOSOUND are not covered by this warranty This warranty is exclusive and no other...

Страница 32: ...user manual LMS D24 26 LMS D2X user manual Page 32 NOTES ...

Страница 33: ...Turbosound Ltd Star Road Partridge Green West Sussex RH13 8RY England Tel 44 0 1403 711447 Fax 44 0 1403 710155 web www turbosound com ...

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