Turbosound LMS-D4 User Manual

LMS-D4

DIGITAL LOUDSPEAKER

MANAGEMENT SYSTEM

USER MANUAL

Turbosound Ltd.

Star Road, Partridge Green

West Sussex RH13 8RY England

Tel: [phone] Fax: [phone]

web: www.turb osound.com

user manual

LMS-D4

CONTENTS

Important Safety Information............................................................................................................3

Unpacking the LMS-D4......................................................................................................................4

Introduction ........................................................................................................................................5

Features ............................................................................................................................................. 5

Front Panel Functions ........................................................................................................................6

Rear Panel Functions.......................................................................................................................... 7

Output Configurations .......................................................................................................................8

Operating the LMS-D4 .......................................................................................................................9

Crossover Settings...........................................................................................................................11

Specifications...................................................................................................................................15

Warranty...........................................................................................................................................16

Appendix A.......................................................................................................................................17

LMS-D4 user manual
Page 2

An example of this equipment has been t ested and found to comply with the
following European and international Standards for Electromagnetic
Compatibility and Electrical Safety:

Conducted and Absorbed Emissions (EU): EN55103 (1996)
Harmonic Current Emisi ons (EU): EN61000-3-2
Voltage Fluctuations/Flicker (EU): EN61000-3-3
Generic Immunity (EU): EN50082-1 (1997)
Electrical Safety (EU): EN60065 (1998)
Electrical Safety (US): UL6500 (2000)
Electrical Safety (Canada): CSA E6500 (1999)

Important Safety Information

Please read carefully and keep the following instructions and safety information.
Heed all warnings and follow all instructions.

user manual

LMS-D4

• Do not remove covers. There are no user serviceable parts inside, please refer
servicing to qualifi ed service personnel. This equipment must be earthed.

• Protect the power cord from being walked on or pinched parti cularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.

• Only use attachments/accessori es specified by the manufacturer.

• Servicing is required when t he 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 the apparatus, the apparatus has been exposed to rain or moisture,
does not operate normally, or has been dropped.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

DO NOT EXPOSE TO RAIN OR MOISTURE

ATTENTION

RISQUE DE CHOC ELECTRIQUE

NE PAS ENLEVER

NE PAS EXPOSER A LA PLUIE NI A L’HUMIDITE

LMS-D4 user manual

Page 3

user manual

LMS-D4

Thanks

Thank you for choosing the TURBOSOUND LMS-D4 for your application. Please spare a little time
to study the contents of th is manual, so that you obtain t h e best possible performance from this
unit.

All TURBOSOUND products are carefully engineered for world class performance and reliability.

If you would like further information about this or any other TURBOSOUND product, pl ease
contact us.

We look forward to helping you in the near future.

Unpacking the LMS-D4

After unpacking the unit please check carefully for damage. If damage is found, please notify the
carrier concerned at once. You, the consignee, must instigate any claim. Please retain all
packaging in case of future re-shipment.

LMS-D4 user manual
Page 4

Introduction

The LMS-D4 is a compact and powerful DSP based audio-processing unit designed for use with
particular Turbosound loudspeaker systems and associated bass enclosures, com bining the
functions of multi ple conventional products in a compact 1U high 19” rack unit. To achieve thi s the
LMS-D4 has 2 inputs and 4 outputs, which are configured by differ ent system presets to allow two
basic modes: stereo 2 way and mono 3 way. The unit is designed to provide specific equalisation
and crossover points aimed at opt imising the perform ance of these Turbosound loudspeaker
systems. In addition, limiters, delays (up to the equivalent of 14 metres), gain, polar ity, and bass
trim controls are accessible to the user in order to match specific operation environments. The
LMS-D4 is designed for quick set up and adjustment via easy-to-use front panel controls.

Features

user manual

LMS-D4

• The LMS-D4 provides e x
performance converters f o r a full >108dB dynamic range, hi gh sampling rate and minimal
filtering. Audio-grade capacitor s are used in the analogue signal path.

• Bass boost filt er

Bass boost fil ter, allowing an easy adjustment of the response to match variations in acoustic

Bass boost filterBass boost filter
environment such as half space operat ion (for floor monitor use), coupling of cabinets in
arrays, or room resonances.

• Front panel rot ary encoder

Front panel rotary encoder providing a familiar and easy to use control format with all filter

Front panel rotary encoderFront panel rotary encoder
information displ ayed simultaneously on a backlit LCD di splay.

• Delay of up to 42mS

Delay of up to 42mS can be set for each output (mono) or each pair of outputs (stereo) .

Delay of up to 42mSDelay of up to 42mS

exceptional audio quali t y

ceptional audio quality with carefully optimised processing and high

exex

ceptional audio qualityceptional audio quality

LMS-D4 user manual

Page 5

user manual

LMS-D4

Front Panel Functions

3 286

LMS-D4

DIGITAL LOU D SPEAKER MANA GEMENT SYST EM

14 5 7 9 10

1. LCD Display

LCD Display - Shows menu options, output information and the parameters being adjusted.

LCD DisplayLCD Display

2. Menu Key

Menu Key - Activates the main menu on the LCD display, and toggles between menu options

Menu KeyMenu Key
and system name display. Different menus are selected by pressing the

< BACK NEXT >

MENU ENTER

SCROLL A B

CLIP

-24

1234

LIMIT

MUTE

‘BACK’

‘BACK’

‘BACK’‘BACK’

RS-232

and

‘NEXT’

‘NEXT’

‘NEXT’‘NEXT’

keys.

3. Next Key

Next Key - Moves forwards through the list of available menus or options

Next KeyNext Key

4. Back Key

Back Key - Moves backwards thr ough the list of available m enus or options.

Back KeyBack Key

5. Enter Key

Enter Key - Enters the chosen menu and confir m s menu selections.

Enter Key Enter Key

6. Scroll knob

Scroll knob - The rotary encoder allows the current parameter displayed on the LCD screen to

Scroll knobScroll knob
be adjusted, and scrolls through the available list of presets.

7. Input LED’s

Input LED’s - The bottom green LED indicates when the input signal is at -24dBu, whereas the

Input LED’sInput LED’s
top red LED indicates overload of the analogue to digital converter.

LMS-D4 user manual
Page 6

8. Limiters LED’s

Limi ters LED’s – Indicates when limiting occurs on a particular output channel. The red LED is

Limiters LED’s Limiters LED’s
set at the limiter threshold for that channel, provided limiter and gain settings are correct.

9. Mute Key

Mute Key – This mute key is active on all four output channels simultaneously. The red LED is

Mute Key Mute Key
illuminuted when the channels are muted.

10. RS232 input

RS232 input – The 9-pin socket allows communication with a PC via a serial COM port and a

RS232 inputRS232 input
standard RS232 cable.