Meridian America DSP33 User Manual

user guide

Meridian

DSP

33 Digital Loudspeaker System

Meridian DSP33 Digital
Loudspeaker System
User Guide

Preface

i

Sales and service in the UK

Meridian Audio Ltd

Stonehill

Stukeley Meadows

Cambs

PE18 6ED

England

Tel␣ ␣ (01480) 52144

Fax␣ ␣ [phone]

World Wide Web

http://www.meridian-audio.com

Part no: DSP33

Sales and service in the USA

Meridian America Inc

3800 Camp Creek Parkway

Building 2400

Suite 122

Atlanta

GA 30331

Tel␣ ␣ [phone]

Fax␣ ␣ [phone]

Designed and

manufactured in the UK by

Digital Gramophone and Wireless Ltd

Stonehill

Stukeley Meadows

Cambs

PE18 6ED

England

Preface

ii

Copyright © 1999 Digital Gramophone and
Wireless Ltd.

Boothroyd|Stuart Meridian, Meridian,
Meridian Digital Theatre, Meridian
Lossless Packing, MHR, and MLP are
registered trademarks of Meridian
Audio Ltd.

MHR: This product incorporates copyright
protection technology covered by certain
patent applications and intellectual
property of Meridian Audio Ltd. This
technology is provided for the express
purpose of securely containing copyright
audio within the Meridian System only.

Reverse engineering or circumvention of
this protection is strictly prohibited.

This guide was produced by
Human-Computer Interface Ltd,
http://www.interface.co.uk

Contents

Introduction 1

Introduces the DSP33 Digital Loudspeaker
System, and gives guidelines and
suggested layouts to help you plan your
surround system.

The DSP33 Digital Loudspeaker

System ................................................... 2

Sample configurations ........................... 5

Specification and accessories ............... 7

Setting up the DSP33
Digital Loudspeaker
System 9

Describes how to unpack and install the
digital loudspeakers and explains how to
connect them to your equipment.

Unpacking .............................................. 10

Positioning the digital loudspeakers ...... 11

Connecting the loudspeakers ................ 13

Connecting the digital loudspeakers ..... 15

Using the DSP Digital
Loudspeaker System 19

Provides step-by-step instructions for
operating the digital loudspeakers in
compact systems with no other
preamplifier or control unit.

Selecting a source ................................. 20

Adjusting the volume ............................. 21

Adjusting the balance or phase ............. 22

Preface

iii

Configuring the DSP33
loudspeakers using a
computer 23

Describes how to configure the digital
loudspeakers using the Meridian
Configuration program.

Troubleshooting 35

Preface

iv

The Meridian Configuration program ..... 24

Running the Meridian Configuration

program ................................................. 25

Creating a new settings file.................... 27

Changing the setup options................... 29

Setting up sources ................................. 31

Completing the configuration ................ 34

Provides suggested solutions to typical
problems.

Troubleshooting ..................................... 36

Service and guarantee ........................... 39

Index ...................................................... 41

Introduction

The Meridian DSP33 Digital Loudspeaker System combines the latest

acoustic and drive unit technology with multiple built-in power amplifiers

and advanced high precision digital signal processing. The result is a

speaker that produces extremely high-quality sound from a compact

enclosure, and is ideal either as part of a stereo system or a full home

theatre.

For instructions on setting up the loudspeakers turn to the next chapter,

Setting up the DSP33 Digital Loudspeaker System. Once they have been

set up refer to Using DSP33 Digital Loudspeaker System, page 19, for

information about getting the best results from all your music and film

recordings.

Introduction

1

The DSP33 Digital Loudspeaker System

Introduction

The DSP33 Digital Loudspeaker System incorporates the result
of several years of research and development into innovative
technologies.

Digital Signal Processing

Digital Signal Processing, or DSP, is a technique pioneered by
Meridian in hi-fi products for achieving extremely accurate
reproduction of audio signals using high-precision mathematical
processing.

DSP allows sophisticated processing to be performed without
any of the cumulative noise or degradation that inevitably
occurs, even with high-quality analogue circuitry. In addition, the
signal improvement techniques incorporated in the DSP33
would be virtually impossible to implement in analogue circuitry.

The DSP33 takes advantage of DSP for several different
functions:

❍To remove timing variations from the incoming digital signals

(de-jittering).

❍To split the frequency band between the treble and bass

drivers (crossover).

❍To perform filtering or adjustment of the frequency response;

eg treble or bass.

❍To provide volume control to 48-bit precision.
❍To provide bass extension by boosting the bass at moderate

levels to take full advantage of the capabilities of the drive
units.

If you are using the DSP33 Digital Loudspeaker System with a
digital source, such as CD or DVD, the signals remain in digital
form until the last possible stage.

DSP33 drivers

Each DSP33 loudspeaker uses two parallel 125mm (5") bass
drive units. These incorporate a cast alloy chassis and a carbon
fibre cone, and have a very large magnet which provides
excellent drive and control. Combined with the Meridian’s active
bass extension technology, they provide surprisingly rich, deep
bass, quite unprecedented for this size of cabinet.

The treble unit is a very high quality 25mm (1") aluminium dome
with a Neodymium magnet and a protective grille. It is extremely
well matched to the woofer, and also tonally very compatible
with the other speakers in the Meridian range.

2

Power amplifiers

Mounting options

The speakers are driven by two high-power low-feedback power
amplifiers. The combination of idealised magnetic design,
careful star earthing, and very fast output devices give the
amplifiers extremely low noise, high detail, and fast bass.

The whole electronic assembly is supplied from a substantial
torroidal transformer feeding high-quality audiophile-grade
capacitors.

Cabinet

Each DSP33 loudspeaker is built around a precision
manufactured aluminium cabinet. The rigidity of this material,
combined with the built-in structural elements, gives incredibly
low levels of cabinet resonance, which is further reduced by
additional damping. This results in a cabinet of exceptionally low
colouration, giving the loudspeaker amazing mid-range
transparency.

The DSP33 is designed to be used either vertically or
horizontally mounted and uses fully shielded drive units so that it
can be placed above or below a television without interference.
If ordered as a centre it is supplied with a plinth, which can be
used to give rigid support and tilt the centre channel towards the
listener.

Meridian High Resolution (MHR)

The DSP33 Digital Loudspeaker System supports Meridian High
Resolution (MHR), to allow you to connect to other MHR­compliant Meridian products to take advantage of high-rate
audio sources, and provide the additional benefits of lower jitter
and improved sound quality on all sources.

MHR is a proprietary secure encoding format that uses
encryption and anti-copy methods to provide a secure copyright
protection environment, and allow the secure transfer of audio
streams within a Meridian-only system for playback only.

Introduction

3

Meridian Comms

The DSP33 Digital Loudspeaker System is part of the Meridian
family of advanced digital, analogue, and video components,
and these incorporate a sophisticated communications link, to
allow you to control any combination of units using a single
remote, and ensure that they will work together as a fully
integrated system.

The communications system also allows you to extend your hi-fi
system into two or three rooms, with the ability to control the
sources in one room from the controller in another room.

The following pages show two recommended configurations
based on the DSP33 Digital Loudspeaker System to illustrate
the flexibility of Meridian components.

Introduction

4

Sample configurations

Meridian Digital Compact Theatre™

DSP33 rear DSP33 rear

DSP33

Meridian DVD Player

Meridian Surround Processor

Five DSP33 loudspeakers can be used in conjunction with a
Meridian Surround Processor to create a compact surround
system with superb music and cinema sound.

DSP33DSP33

D1500

The DSP33 provides an unusually good response for such a
compact case, and can be mounted either horizontally or
vertically for total flexibility.

A Meridian D1500 Digital Subwoofer can be added for extended
bass performance.

Introduction

5

DSP33 Digital Loudspeaker System

Other applications

Introduction

6

DSP33DSP33

512

Meridian DVD Player

The DSP33 can be connected directly to almost any source that
provides a PCM SPDIF output, including CD or DVD players,
some PC soundcards, and digital satellite decoders. The DSP33
includes a DSP volume control, and with Meridian sources this
operates seamlessly via the 500 comms system.

Alternatively, the volume can be controlled with the Meridian
System Remote using the optional 512 Remote Eye, or via the
RS232 interface using the optional RS232 lead.

Other applications include:

❍High-quality multimedia PC speakers with RS232 control of

volume etc.

❍Surround speaker in a Meridian Digital Theatre (extra S5 lead

required).

❍Main speaker in a Digital Music System with a Meridian CD

Player (512 and D5 lead required).

❍Main speakers with another source of digital audio; eg satellite

(512, D5 lead and MSR required).

❍Second zone speaker in a Meridian two-room plus system

(long M5 lead, 512, D5 lead, and MSR required).

These applications may require additional accessories; for more
information see Available accessories, page 8.

Specification and accessories

Specification

Digital inputs 2 x cable, 75Ω, IEC958, 32-96kHz. FIFO

locks at 44.1, 48, 88.2, or 96kHz ±
150ppm.

1 x digital output cable, 75Ω, IEC958,
providing a copy of the selected input.

Processing 1 x Motorola 56364 running at 100MHz.

Power amplifiers Low feedback complementary bipolar

design, with output-stage error
correction and twin loop design.

Treble: 50W RMS.

Bass: 85W RMS.

Digital to analogue 24-bit Delta-Sigma.

conversion

Distortion Typically <0.01%, or <0.05% up

to full power at all frequencies.

Noise and hum <-95dBr at all volume settings.

Acoustic output Typically >104dB spl @ 1m.

Acoustic noise <15dB spl @ 1m.

Frequency response In room response within 3dB, 60Hz-

20kHz, lower at moderate volumes.

Crossover Linear-phase ±30º at 2.3kHz.

Drive units Woofers: 2 x 125mm (5") carbon fibre

custom drivers, cast alloy chassis.

Tweeter: 1 x 25mm (1") aluminium dome
neodymium magnet, with protective grille.

Control 2 x Meridian Comms.

9-pin D connector for RS232 PC setup
and control, null modem, 9600 baud,
2N1, no handshake.

Cabinet Extruded and cast aluminium with

bracing elements.

Dimensions 150mm x 395mm x 210mm

(5.9" x 15.6" x 8.3") (W x H x D).

Weight 9.5kg (21lb) each.

Power 100-125; 200-250V AC 50-60Hz.

6VA idle; 200VA max.

Meridian Audio reserves the right to amend product
specifications at any time.

Introduction

7

Available accessories

The DSP33 is shipped ready to be used as the front speakers in
a small Meridian Digital Theatre with a Meridian DVD Player
(such as the 800 or 580) or a Meridian Digital Surround
Controller (such as the 861, 568, or 561).

Other applications, and some advanced features, may require
one or more of the following accessories, which can be
purchased from your Meridian dealer.

❍Meridian System Remote.
❍512 Remote Eye for remote control reception.
❍D5 lead for connecting between the 512 and DSP33.
❍Additional S5 leads (8m and 14m).
❍511 S-patch box if connecting more than two DSP33s to a

561 Digital Surround Controller or 568 Digital Surround
Processor.

Introduction

8

Setting up the DSP33 Digital Loudspeaker System

This chapter explains how to install the DSP33 Digital Loudspeaker

System. It describes what you should find when you unpack the speakers,

how you should connect them to your other audio equipment, and the

siting constraints.

Before you begin installation you should ensure that your digital

loudspeaker system is the correct voltage for your local AC supply. If it is

not, do not try to install the unit, and contact your dealer.

You should not make any connections to the digital loudspeakers, or to

any other component in your system, while the AC power supply is

connected and switched on.

Setting up the DSP33 Digital Loudspeaker System

9

Unpacking

The digital loudspeaker system is supplied in a box containing
the following components:

❍DSP33 Loudspeaker(s) complete with grille.
❍Four self-adhesive feet per speaker.
❍This user guide.
❍Power cord suitable for your territory per speaker.
❍Meridian M5 lead.
❍Meridian S5 lead.
❍Meridian Configuration program.
❍RS232 cable.
❍R reset plug (see page 13).
❍Centre channel plinth (if ordered as a centre channel).

If any of these items is missing, please contact your dealer. We
suggest that you retain the packaging carefully, as it provides
maximum protection in transit.

Radio interference

FCC Warning: This equipment generates and can radiate radio
frequency energy and if not installed and used correctly in
accordance with our instructions may cause interference to
radio communications or radio and television reception. It has
been type-tested and complies with the limits set out in Subpart
J, Part 15 of FCC rules for a Class B computing device. These
limits are intended to provide reasonable protection against
such interference in home installations.

EEC: This product has been designed and type-tested to
comply with the limits set out in EN55013 and EN55020.

Setting up the DSP33 Digital Loudspeaker System

10

Positioning the digital loudspeakers

Safety warnings

❍Do not expose the speakers to dripping or splashing.
❍Do not place any object filled with liquid, such as a vase, on

the speakers.

❍Do not place naked flame sources, such as lighted candles,

on the speakers.

To avoid overheating

Do not position the speakers:

❍In direct sunlight.
❍Near heat sources, such as a radiator.
❍Directly on top of heat producing equipment, such as a power

amplifier.

The DSP33 cabinet acts as a heatsink and requires adequate
ventilation. Ensure that air can flow around it.

To avoid interference

Do not position the speakers:

To position the digital loudspeakers

The DSP33 loudspeakers can be used either horizontally or
vertically. If the DSP33 is mounted on a bookshelf, or mounted
horizontally on top of a television, the feet should be attached as
shown below. The best sound will only be obtained if the DSP33
is firmly mounted, and does not rock when pushed.

Setting up the DSP33 Digital Loudspeaker System

❍Near strong magnetic radiation, such as near a power amplifier.

Vertical Horizontal

11

To obtain the best sound

For best results adjust the position of the loudspeakers while
listening to music.

If possible, have the most acoustically absorbent wall in the
room behind the front speakers. Ideally have each DSP33 at
least 0.5m (20") from a corner.

If the speakers are mounted on stands, position them
approximately 0.25m (12") from the wall.

To wall mount the digital
loudspeakers

The DSP33 has been designed to be secured with an
OmniMount 75 Series wall bracket, details of which may be
obtained from OmniMount Systems, USA (818-766-9000). The
mounting bolts are shown on the back panel. These are M6
Allen Bolts. Do not use any other bolt for the OmniMount
bracket. Please follow the instructions for fitting provided with
the bracket. It is entirely the responsibility of the installer to
ensure that the DSP33 is securely fastened.

If you are using the speaker as a centre channel, place the
speaker centrally between the main left-right pair and, if
possible, arrange for the tweeters of the three speakers to be
approximately the same height. The plinth allows the centre
channel to tilt towards the listener for optimum imaging.

Setting up the DSP33 Digital Loudspeaker System

12

No other bolts should be undone on the rear panel.

Caution: The DSP33 is heavy for its size.

Connecting the loudspeakers

Back panel

The following diagram gives details of the rear panel

DIGITAL

MERIDIAN COMMS

OUTPUT INPUT

OUTPUTINPUT

1

2

RS232

CHANNEL

LEFT/

RIGHT

CENTRE

Connections

Omnimount
wall bracket

connections:

CHANNEL

Channel
selection

RS232

RIGHT

PC

Setting up the DSP33 Digital Loudspeaker System

Digital
inputs

DIGITAL

1

2

OUTPUTINPUT

Digital
output

MERIDIAN COMMS

OUTPUT INPUT

LEFT/

CENTRE

Comms

fixing holes

To reset the configuration of the

OFF

ON

Power input
Fuse

digital loudspeaker

The following procedure can be used to reset the configuration
of the DSP33 loudspeaker to the default settings, without
needing a computer, using the R reset plug supplied.

● Unplug the COMMS connections.

● Plug the R reset plug into the COMMS input socket.

● Switch the loudspeaker off, and then on again.

● Replace the original COMMS connection.

13

Digital connections

Communications connections

The following table gives details of the digital audio inputs:

Use this input To connect to this

DIGITAL INPUT 1, A digital source, such as a digital
DIGITAL INPUT 2 preamplifier, digital control unit, CD

player or DVD player.

DIGITAL OUTPUT A second (slave) DSP loudspeaker,

using an S5 lead.

The digital connections should be made with high-quality 75Ω
screened cable. Suitable cables are available from Meridian. We
do not recommend using audio cables, which do not have
adequate shielding or the correct impedance, or cables intended
for UHF applications, as these do not provide adequate
shielding in the 1–30MHz region.

Setting up the DSP33 Digital Loudspeaker System

14

The following table gives details of the communications
connections:

Use this connection To connect to this

COMMS INPUT The COMMS connection on a

Meridian control unit or
preamplifier.

COMMS OUTPUT The COMMS INPUT on a second

DSP loudspeaker.

RS232 The serial port of a PC, to

configure the DSP33. See

Configuring the DSP33
loudspeakers using a computer,

page 23.

Connecting the digital loudspeakers

To connect two DSP33 loudspeakers
in a Meridian system

562V Multimedia Controller

DIGITAL

COMMS

OUTPUT

M5 lead

DSP33 – Main R DSP33 – Main L

DIGITAL

INPUT OUTPUT
1
2

COMMS

OUTPUT INPUT

CHANNEL CHANNEL

DIGITAL

INPUT OUTPUT
1
2

S5 lead

You can connect two DSP33 loudspeakers directly to a Meridian
DVD player, Meridian 568 Digital Surround Processor, Meridian
561 Digital Surround Controller, or Meridian 562V Multimedia
Controller.

● Connect one of the COMMS sockets on the Meridian source

or control unit, and the MAIN digital output, to one of the
digital speakers using the M5 lead supplied.

COMMS

OUTPUT INPUT

● Link the two digital speakers together using the S5 lead

supplied, as shown in the illustration.

● Set the CHANNEL switch to the appropriate position on each

loudspeaker.

To use a DSP33 loudspeaker as a
centre speaker

You can use a single DSP33 as a centre speaker in a Meridian
surround system.

● Connect the speaker to the CENTRE digital output using an

M5 lead, as shown in the previous illustration.

● Set the CHANNEL switch on the back of the loudspeaker to

the LEFT/CENTRE position.

Setting up the DSP33 Digital Loudspeaker System

15

To connect three or more DSP33
loudspeakers in a Meridian surround
system

DSP33

Centre (master)

CHANNEL

568 Digital Surround Processor

If your system includes more than two Meridian DSP
loudspeakers you will need a 511 S-patch box (available
separately) to link together the S5 leads from each speaker, as
shown on the left.

● Use the comms part of an M5 lead to connect one of the

COMMS sockets on the Meridian Surround Controller to the
digital speaker you have chosen as the master (typically the
centre speaker).

COMMS

OUTPUT INPUT

DIGITAL

1

INPUT OUTPUT

M5 lead

S5 lead (digital unused)

2

DSP33 – Main R DSP33 – Main L

DIGITAL

INPUT OUTPUT
1
2

COMMS

OUTPUT INPUT

CHANNEL CHANNEL

S5 lead

Setting up the DSP33 Digital Loudspeaker System

16

DIGITAL OUTPUTSCOMMS

511 S-patch box

DIGITAL

INPUT OUTPUT
1
2

COMMS

OUTPUT INPUT

S5 lead

● Use the audio part of the M5 lead to connect the digital

speaker to the appropriate digital output socket.

● Connect the COMMS output from the master digital speaker

to one socket on the 511 using an S5 lead.

● Link all the other digital speakers together using S5 leads, as

shown in the illustration. The other sockets on the 511 can be
used to distribute the comms to each slave speaker.

● Use the duplicate sockets on each digital speaker to link the

speakers together in pairs, corresponding to the pairs of
channels on the digital outputs.

● Set the CHANNEL switch on the back of each speaker to the

appropriate position.

To connect two DSP33 loudspeakers
to a Meridian CD Player or other
digital source

508.24 24-Bit CD Player

DIGITAL

COMMS

OUTPUT

M5 lead

DSP33 – Main R DSP33 – Main L

DIGITAL

INPUT OUTPUT
1
2

COMMS

OUTPUT INPUT

CHANNEL CHANNEL

S5 lead

You can create a complete system by connecting a pair of DSP33
loudspeakers directly to a digital source. You need the optional
Meridian 512 Remote Eye, and a D5 lead, to allow you to control
the volume and balance using the Meridian System Remote.

● Connect one of the COMMS sockets on the Meridian source,

and the digital output, to one of the digital speakers and one
of the sockets on the D5 lead, as shown in the diagram.

512 Remote Eye

DIGITAL

INPUT OUTPUT
1
2

COMMS

OUTPUT INPUT

D5 lead

● Connect the 512 Remote Eye to the other socket on the D5

lead.

● Link the two digital speakers together using the S5 lead

supplied, as shown in the illustration.

● Set the CHANNEL switch to the appropriate position on each

loudspeaker.

See the chapter Using the DSP33 Digital Loudspeaker system,
page 19, for information about controlling the DSP33
loudspeakers.

Setting up the DSP33 Digital Loudspeaker System

17

To use the DSP33 as a multimedia
speaker with a PC

The DSP33 can be controlled via its RS232 port using any
terminal emulation software such as HyperTerminal. This allows
you to control the volume, balance, phase, bass and tilt in
addition to the advanced setup features described in the next
chapter.

● Connect the DSP33s together with the S5 lead supplied, as

shown in To connect two DSP33 Loudspeakers in a Meridian
system, page 15.

● Connect one end of the phono part of the M5 lead to the input

on the DSP33, and connect the other end to the soundcard’s
SPDIF digital output.

● Set the CHANNEL switch to the appropriate position on each

loudspeaker.

● Connect the RS232 lead to a serial port on the PC.

An application note giving more information is available on the
Meridian web site at http://www.meridian-audio.com.

Setting up the DSP33 Digital Loudspeaker System

18

Using the DSP33 Digital Loudspeaker System

In systems with a Meridian preamplifier or control unit all of the functions

of the DSP33, including volume, tilt, and bass, are operated via the

controller. For more information refer to the user guide for the preamplifier

or control unit, and you can ignore this chapter.

However, the DSP33 Digital Loudspeaker System can also be connected

directly to up to two digital sources to create a complete, minimum

system. This chapter provides step-by-step instructions for operating the

digital loudspeakers in a system with no Meridian preamplifier or control

unit.

Using the DSP33 Digital Loudspeaker System

19

Selecting a source

When not playing, the digital loudspeakers should be left in the
standby state. This uses a negligible amount of electricity, but
ensures that the components of the loudspeakers operate at
maximum efficiency from the moment you start.

If you are not going to use the digital loudspeakers for several
days you should switch each unit completely off at the back
panel, and disconnect it from the AC power supply.

To select a source

● Press the appropriate source key on the remote; eg DVD.

This will bring the digital loudspeakers out of standby, and the
back-panel indicator on each speaker will be bright.

As standard, all the sources are set to select the D1 digital input
of the DSP33. To select the D2 input, see To configure the
source options, page 31.

To switch to standby

● Press Off on the remote.

The loudspeakers will switch to standby and the back panel
indicator on each speaker will dim.

Using the DSP33 Digital Loudspeaker System

20

Adjusting the volume

The digital loudspeakers adjust the volume in precise steps of

1dB, where 9dB is equivalent to doubling the loudness, and can

be varied in the range 1 to 99dB.

When you first connect power to the digital loudspeakers the

volume is set to 65, which is similar to the midway position of

the rotary volume control on a conventional preamplifier.

To change the volume

● Press the red A or V keys on the remote.

To mute the sound

● Press Mute on the remote.

When the sound is muted the back panel indicator on each

speaker is dimmed.

To restore the sound

● Press Mute again on the remote.

Alternatively, the sound will be restored if you adjust the volume.

The back panel indicator on each speaker will go bright.

Using the DSP33 Digital Loudspeaker System

21

Adjusting the balance or phase

The balance control of the DSP33 Digital Loudspeaker System
uses digital signal processing to compensate for an off-centre
listening position by delaying and diminishing the sound in one
speaker, thus effectively shifting the speaker’s image back.

To change the balance

● Press < or > on the remote.

There are 20 settings in each direction.

To reset the balance to the centre

● Press V on the remote.

Note: Because the use of the balance control processes the
digital signal, you may hear a slight clicking as the balance is
adjusted.

To change the phase

● Press A on the remote.

The phase function controls the absolute phase of the digital
conversion. It can be used to compensate for signals that are
out of phase, giving an unnatural-sounding bass.

Using the DSP33 Digital Loudspeaker System

22

Configuring the DSP33 loudspeakers using a computer

The DSP33 Digital Loudspeaker System provides a range of configuration

options, which you can change to suit your own preferences and the other

equipment in your system. To configure the DSP33 Digital Loudspeaker

System you connect the master loudspeaker to a PC, and then use the

Meridian Configuration program to set the configuration you want.

This chapter explains how to install the Meridian Configuration program,

and then how to use it create your own configuration of the DSP33.

Configuring the DSP33 loudspeakers using a computer

23

The Meridian Configuration program

The Meridian Configuration program is a stand-alone Windows­based application that lets you design your own configuration of
the DSP33 Digital Loudspeaker System to suit your own
personal preferences and the particular configuration of
equipment in your system.

The Meridian Configuration program provides the following
sections to allow you to control the corresponding aspects of
the speaker’s operation:

Setup

Lets you specify general features of the multimedia
controller’s operation, including the operation of the
volume control and menus, and settings affecting
its operation in multi-room systems.

Sources

Lets you customise the operation of each of the
sources, including the audio input used for the
source, and additional information about the type of
each source.

Requirements

To use the Meridian Configuration program you need:

❍A computer running Windows 95, Windows 98, or Windows

NT 4.00.

❍A 100MHz or faster Pentium-class processor.
❍At least 16Mbytes of RAM.
❍5Mbytes of free disk space.
❍A vacant 9-pin serial port assigned to one of COM1 to 4.

The software requires a mouse or similar pointing device – it
cannot be operated solely from the keyboard.

To install the Meridian Configuration
program

● Insert the first Meridian Configuration program installation

disk.

● Choose Run... from the Start menu.

● Type A: setup and press R.

Configuring the DSP33 loudspeakers using a computer

24

● Follow the on-screen instructions, inserting the second

installation disk when prompted.

Running the Meridian Configuration program

To run the Meridian Configuration
program

● Click Start, point at Programs, Meridian then click Product

Configuration.

The Meridian window will be displayed:

The toolbar provides a convenient way of accessing the most
important menu options:

Button Option Function

New Creates a new settings file.

Open Opens an existing settings file.

Save Saves the current settings file to

disk.

Fetch Fetches the current configuration

of the attached product.

Store Stores the current settings to the

attached product.

Disconnect Disconnects the program from the

attached product.

Add Product Adds a product to the current

settings.

Copy Copies text or settings onto the

clipboard.

Paste Pastes text or settings from the

clipboard.

About Displays program information.

Configuring the DSP33 loudspeakers using a computer

25

To select which loudspeaker to
configure

In any system incorporating one or more DSP33 loudspeaker
you will need to configure the master DSP33 loudspeaker; ie the
one connected to the COMMS socket on your preamplifier or
control unit by an M5 lead.

To connect the serial cable

The serial cable is symmetrical, and can be connected either
way round.

● Connect one end to the RS232 connector on the back panel

of the DSP33 loudspeaker.

You will only need to configure the other DSP33 loudspeakers in
your system if you want to change the Front or Centre speaker

boundary from its default value, Free, or set a Centre speaker
tilt offset. For more information see Changing the setup options,

page 29.

Configuring the DSP33 loudspeakers using a computer

26

● Connect the other end to one of the serial ports on the PC or

PC notebook computer.

Then specify the serial port you are using as follows:

● Choose Options... from the View menu to display the

Options dialogue box:

● Select the port you want to use and click the OK button.

Creating a new settings file

This section explains how to create a new settings file, using the
Meridian Configuration program, and how to enter personal
information to identify the settings in your product.

If you are programming the DSP33 Loudspeaker for the first
time:

● Click the New button in the toolbar.

If you are amending an existing configuration:

● Click the Fetch button to fetch the existing settings.

The Progress dialogue box will show you the progress as the
settings are fetched:

A new settings file will be created for you, with the initial name

MSF1, and the Meridian window will show a Digital active
loudspeaker icon to identify the product you are configuring.

● Choose Save As from the File menu, enter an appropriate

name for the file, such as your name, and click the Save
button.

Configuring the DSP33 loudspeakers using a computer

27

To display the settings

To display or edit the settings

● Double-click the Digital active loudspeaker icon, to open it

and display the settings it contains.

The left-hand panel of the Meridian window will change to show
the following two icons:

Settings is the initial configuration in the settings file.

Double-clicking Return to top level takes you back to the
previous level.

Configuring the DSP33 loudspeakers using a computer

28

● Double-click the Settings icon.

The Meridian window will change to show the two categories of
settings contained in the settings file: Sources and Setup.

The options available in each case are explained in the following
sections.

At this stage you may find it useful to maximise the Meridian
Configuration program window so you can see all the options on
each screen.

Changing the setup options

The next stage in editing the settings is to configure the general
Setup options.

To change the setup options

● Click the Setup icon in the left-hand panel of the Meridian

window.

The Setup options will be displayed:

If you choose Meridian surround controller the Start volume,
Tilt, and Bass options are controlled by the surround controller,
and will be greyed out in the Meridian Configuration program.

● Set the Speaker use to Normal for a main or surround

speaker, or Centre for a centre speaker.

If the speaker is close to a wall or corner, you can optionally
apply bass equalisation to adjust the frequency response to
compensate for its position.

● Use the appropriate Front or Centre speaker boundary

drop-down menu to choose the appropriate option:

Option What it means

Free Flat frequency response.

Boundary Speaker closer than 0.5m (2') to a wall.

Sub 1 or 2 Applies a second-order high-pass filter at

80Hz or 120Hz respectively for use with
an analogue subwoofer.

Corner Speaker closer than 0.5m (2') to a corner.

Configuring the DSP33 loudspeakers using a computer

● In the Controlled by section choose the appropriate option

for the system you are using.

29

For best results with a Meridian D1500 or D2500 subwoofer
choose Free, Boundary, or Corner as appropriate.

Advanced options

The Advanced options are described in the following table:

If you have specified the Speaker Use as Centre you can apply
a Centre Speaker tilt offset, which is added to the Tilt value for
the selected source.

The recommended setting is -1dB when the speaker is
positioned above a television.

Start volume

The Start volume setting determines the volume selected on
coming out of standby.

● Set the Start volume to 65 to leave the volume unchanged

(as on other Meridian products).

● Set the Start volume to a value other than 65 to set the

volume to that value.

Configuring the DSP33 loudspeakers using a computer

30

Option What it means

Volume control Specifies whether the DSP33

provides volume control for the
system. Choose Main if the DSP33 is
in the main room, Secondary if the
DSP33 is used in a second room, or
None if the DSP33 is in the second or
third room of a three-room system.

Comms controller Specifies whether the DSP33 is
status controller, not controller, or set

automatically.

System address For multi-room setups.

Setting up sources

This section describes how to use the Meridian Configuration
program to configure the sources provided by the digital active
loudspeaker.

To set up sources

● Click the Sources icon in the left-hand panel of the Meridian

window.

The right-hand panel shows a list of the 12 sources that are
available. For each source you can configure its audio, tone, and
advanced settings.

To configure the source options

● Select the source in the list of sources.

The settings for the source are shown in a panel to the right:

To change the name used to identify the source when using
RS232 control:

● Choose a name from the Name drop-down menu.

Configuring the DSP33 loudspeakers using a computer

31

Choosing Unused prevents the source from appearing when

10

2

10

3

10

4

-5.5

-5

-4.5

-4

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

Tilt

Frequency (Hz)

A

m

p

l

i

t

u

d

e

(

d

B

)

you press the corresponding source key on the Meridian System
Remote.

The name used to identify each source is shown in the list of
sources, followed by the Meridian System Remote key used to
select the source in brackets.

Bass

The Bass setting allows you to adjust the bass response to
match the room. The Bass can be adjusted between -5dB and
+5dB steps.

The effect of the Tilt and Bass settings on the frequency
response of the loudspeaker is shown in the following graphs:

● From the Audio source drop-down menu specify the digital

input you want to use for the source.

Initially all sources are set up to use input D1, but you can
connect a second source to D2.

Tilt

The Tilt setting allows you to adjust the broad balance of the
DSP33 to correct for the acoustics of your listening room, or for
a misbalanced recording.

The Tilt can be adjusted between -10dB and +10dB in 0.5dB
steps. Normally settings between -2.0dB and 1.0dB will give the

Configuring the DSP33 loudspeakers using a computer

32

most natural results.

5

4.5
4

3.5
3

)
B

2.5

d

2

(

1.5

e
d

1

u

0.5

t
i

0

l
p

-0.5

m

-1

A

-1.5

-2

-2.5

-3

-3.5

-4

-4.5

-5

Bass Boost / Cut

2

10

Frequency (Hz)

3

10

4

10

Bass Tilt

If the DSP33 loudspeakers are controlled by a Meridian
Surround Controller, the Tilt and Bass settings are adjusted by
the surround controller.

Advanced

Specify the Advanced options as follows:

● Select Poor digital audio source if you have difficulty locking

to the source.

● If the source is connected to another Meridian unit, set

Comms type to 1C for a Meridian CD player, 2C for a
Meridian FM tuner, and 3C for a Meridian DVD player.
Otherwise set it to None.

● If you have two Meridian source units of the same type you

can configure them to have different Comms addresses. You
can then select the appropriate source by specifying its
Comms address in the Comms address field.

Configuring the DSP33 loudspeakers using a computer

33

Completing the configuration

The final stage in creating a settings file is to save it, and then
store it to the speaker.

To save the current settings

● Choose Save from the File menu or click the Save toolbar

button, to save the changes you have made to the
settings file to your PC hard disk.

To store the settings to the DSP33
loudspeaker

● Click the Store button.

The settings will then be downloaded and the back-panel
indicator will flash.

As the download proceeds the following dialogue box shows its
progress:

If the download was successful the DSP33 will switch itself to
standby and the back-panel indicator will go dim.

Configuring the DSP33 loudspeakers using a computer

34

Troubleshooting

This chapter provides suggested solutions to typical problems that may

occur when setting up the digital loudspeaker(s).

If you are still not able to resolve a difficulty with the help of this guide and

the suggestions in the following pages, please contact your Meridian

dealer or Meridian Audio Ltd.

Troubleshooting

35

Troubleshooting

Troubleshooting

36

Green indicator on back panel not lit

Check the following:

❍There is AC power connected to the socket on the back of the

DSP33.

❍The power switch on the back panel of the DSP33 is turned

on.

If the DSP33 will still not illuminate, check any fuses in your
power supply and the fuse in the inlet of the DSP33. If these are
all intact, contact your dealer.

Remote not working

Check the following:

❍The battery in the Meridian System Remote.
❍See if the DSP33 has been set up as not controller in the

Meridian Configuration program; see Changing the setup
options, page 29. Note that this may be deliberate by your

dealer.

Unit goes silent when played hard

❍DSP33 has a temperature sensing system on board, which

prevents overheating of the electronics. The sound will
continue when the speaker has cooled.

Drive units move when the speaker is
switched on or off

❍This is normal as the speaker active electronics settle.

There is radio interference

The DSP33 is a digital audio and computing device which has
been designed to very high standards of electromagnetic
compatibility.

If this equipment does cause or suffer from interference to/from
radio or television reception then the following measures should
be tried:

❍Reorient the receiving aerial (or antenna) or route the antenna

cable of the receiver as far as possible from the DSP33 and its
cabling.

❍Ensure that the receiver uses well-screened antenna cable.
❍Relocate the receiver with respect to the DSP33.
❍Connect the receiver and this product to different AC outlets.
❍If the problem persists contact your dealer.

Centre not working

There may be a connection problem.

❍Check that the channel switch is set to LEFT/CENTRE.

Configuring the DSP33 does not have
any effect

Make sure that you are configuring the DSP33 used as the
master digital loudspeaker in the system. This determines the
configuration of all digital loudspeakers in the system.

Green indicator on back panel is
flashing

This normally indicates that the DSP33 is overheating, and that it
has shut down to cool down. If the DSP33 is cold, it may
indicate a fault.

Meridian Configuration program
repeatedly fails to talk to the
loudspeaker

❍Check that you have selected a COMMS port.
❍Check that no other program currently running is using the

COMMS port.

❍Check that it is connected correctly.
❍Turn off the DSP33 for a few seconds and turn back on, then

retry.

❍Quit from all other programs and retry.
❍Reboot the computer and retry.
❍Ensure you are using the serial lead supplied with the product,

or a null modem cable.

❍If you are using a laptop try turning off the screensaver or

power management software.

Unit stays in standby – light is dim

❍Check that it is connected correctly.
❍Turn the system on from another Meridian product in the

system.

Troubleshooting

37

Only the master loudspeaker plays

❍Check the S5 cables are connected correctly.

Sound is odd or mono

❍Check the channel selector switches on both loudspeakers

are correctly set.

Troubleshooting

38

Service and guarantee

Service

The Meridian components have been carefully designed to give
years of untroubled service. There are no user-serviceable parts
inside the case, nor do the units require any form of
maintenance.

In the unlikely event that your DSP33 fails to function correctly,
it should be returned, in its original packaging, to your Meridian
dealer.

In case of difficulty within the UK or USA please contact the
appropriate sales and service address shown on page ii.

In case of difficulty outside the UK or USA, contact the importing
agent for the territory. A list of Meridian agents abroad is
available from Meridian Audio.

No responsibility can be accepted for the DSP33 whilst in transit
to the factory or an agent, and customers are therefore advised
to insure the unit. When seeking service under guarantee, proof
of the date of purchase will be required.

Guarantee

The DSP33 Digital Loudspeaker System is guaranteed against
defects in material and workmanship for two years from the date
of purchase.

The guarantee is void if the DSP33 Digital Loudspeaker System
has been subject to misuse, accident, or negligence, or has
been tampered with or modified in any way without the written
authorisation of Meridian Audio Limited. Note that connecting
anything other than the correct network lead to the COMMS
sockets may cause damage to the DSP33 Digital Loudspeaker
System which will not be covered by this guarantee. Attempted
servicing by unauthorised people may also invalidate this
guarantee. Labour and carriage charges are not covered unless
by local agreement.

Outside the UK, local warranty liability is restricted to equipment
purchased within the territory. Our agents abroad are only under
contractual obligation to service under guarantee equipment
sold through them. They are entitled to make a non-refundable
charge for any service carried out on other equipment.

Troubleshooting

This guarantee does not limit your statutory rights within the
United Kingdom.

39

Troubleshooting

40

Index

A

Accessories 8

Audio inputs, digital 14

B

Back panel 13

Balance 22

Bass 32

C

Centre speaker

not working 37
using DSP33 as 15

Communications connections 14

Components 10

Computer, configuring using 23

Configuring the digital surround

controller

using a computer 23
using the reset plug 13

D

Digital audio inputs 14

Digital audio output 14

Drivers 2

I

Installing the Meridian

Configuration program 24

Introduction 1

M

Meridian 500 Series 2

communications 4

Meridian comms 4, 14

Meridian Configuration

program 24

installation 24
running 25
toolbar buttons 25

Meridian Digital Compact

Theatre™ 5

Meridian High Resolution (MHR) 3

Muting the sound 21

O

Options (View menu) 26

Options dialogue box 26

P

Phase 22

Positioning 11

R

Radio interference 10, 36

Remote

troubleshooting 36

Reset plug 13

Return to top level icon 28

S

Safety warnings 11

Sample configurations

DSP33 Digital Loudspeaker

System 6

Meridian Digital Compact

Theatre™ 5

Save As (File menu) 27

Selecting a source 20

Serial cable, connecting 26

Serial port, specifying 26

Settings file, creating 27

Settings icon 28

Setup icon 24, 29

Setup options, using a PC 29

Sources

configuring options using a PC 31
selecting 20
setting up using a PC 31

Sources icon 24, 31

Specification 7

Standby

switching to 20

Switching to standby 20

Index

41

T

Tilt 32

Toolbar buttons 25

Troubleshooting 35

U

Unpacking 10

V

Volume

adjusting 21
muting 21

42

Index