Q4 audio DPI 10 User Manual

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DPI Series

User manual

Prelimenary

Professional Power Amplifiers

DPI 10

2 x 300 W

DPI 15

2 x 500 W

DPI 20

2 x 800 W

DPI 30

2 x 1.100 W

DPI 40

2 x 1.500 W

DPI SERIES USER MANUAL

Introduction

Thank you for choosing the Q4audio DPI series for your ap-

plication. You have made an excellent choice. DPI series is part

of a new breed of power amplifiers using our proprietary switching

output stage, also called class D (CLD) topology.

The rugged steel chassis and conventional power supply

based on a low flux toroïdal transformer make it a perfect match

for applications where portability is not a premium requirement.

DPI incorporates unique features that require some study be-

fore being applied. One of these features is the EFL® (Extended

Feedback Loop) remote sensing technique. If you intend to use

this feature read the section on this subject carefully.

Summit Engineering nv

Q4audio division

Tongersesteenweg 90

3800 Sint Truiden

Belgium

tel: +32 69 42 59

fax: +32 69 45 92

www.Q4audio.com

email: info@Q4audio.com

SEPN: 7000-0006

Rev.

Q4audio is a registered trademark of Summit Engineering nv

All other trademarks are property of their respective owners

DPI SERIES USER MANUAL

Table of contents

Introduction ...............................................................................................................................................................................................

. Safety Symbols.....................................................................................................................................................................................3

2. Safety Instructions ................................................................................................................................................................................4

3. DPI series Features ..............................................................................................................................................................................4

4. Setting up the amplifier

.........................................................................................................................................................................5

4. Unpacking the unit ..................................................................................................................................................................5

4.2 Attaching / removing the fancover ........................................................................................................................................... 5

5. Connecting the amplifier

.......................................................................................................................................................................6

5. Familiarisation with the rear panel .......................................................................................................................................... 6

5.2 Configuartion (dipswitch setting)

............................................................................................................................................. 6

5.3. Input connections ...................................................................................................................................................... 7

5.3.3 Speaker connections ................................................................................................................................................ 7

5.3 Connections ............................................................................................................................................................................7

5.3.2 PIM-SIM module ..................................................................................................................................................... 7

5.3.4 Mains connection ...................................................................................................................................................... 8

6. Operation ..............................................................................................................................................................................................9

7. Grounding ...........................................................................................................................................................................................0

8. Specifications

.....................................................................................................................................................................................

9. Dimensions .........................................................................................................................................................................................2

0. Warranty ............................................................................................................ 3

Service request form ..............................................................................................................................................................................4

DPI SERIES USER MANUAL

Explanation of grahical symbols:

This symbol is intended to alert the user of pres-

ence of uninsulated dangerous voltage within

the products enclosure that may be of sufficient

magnitude to constitute risk of electric shock to

persons.

This symbol is intended to alert the user on the

presence of important operating and mainte-

nance (servicing) instructions in the literature

accompanying the appliance.

Explication des symboles graphiques:

Ce symbole doit alerter l’utilisateur du danger

provenant d’un voltage dangereux et non

protégé à l’intérieur de l’appareil, voltage suf-

fisamment fort pour représenter un danger réel

d’électrocution.

Ce symbole doit attirer l’attention de l’utilisateur

sur les instructions importantes qui concernent le

service et la maintenance et qui accompagnent

tout appareil.

Erklärung der Bildsymbole:

Dieses Symbol warnt den Benutzer vor nicht

isolierter gefährlicher Spannung im Inneren

des Gerätes. Diese Spannung ist hoch genug

um Personen durch elektrischen Schlag zu

gefährden.

Dieses Symbol weist den Benutzer auf wichtige

Bedienungs- und Wartungsanweisungen hin die

in den gerätebegleitenden Unterlagen aufgeführt

werden.

Note:

This equipment has been tested and found to comply with EN55103-1and EN55103-2 product specifications. These product

specifications are designed to provide a reasonable protection against harmful interference. This equipment generates, uses and can

radiate radio frequency energy and, if not installed and used in accordance with instructions, can cause harmful interference. There is

no guarantee that interference will not occur in a specific installation. If harmful interference is detected try and correct it by one of the

following measures:

•

Increase the separation between the equipment.

•

Connect the equipment to different mains outlets.

•

Reroute cables.

1. Safety Symbols

CAUTION:

To reduce the risk of electric shoc, do not open.

No user-serviceable parts inside. Refer servicing to qualified

personnel.

WARNING:

To prevent fire or electric shoc, do not expose this

equipment to rain or moisture.

ATTENTION:

Pour éviter les risques de choc électrique, ne

pas ouvrir. Cet appareil ne comporte aucune pièce pouvant

être réparée par l’utilisateur. Confier l’entretien à un technicien

qualifié.

AVERTISSEMENT:

Pour éviter les risques de choc électrique

ou d’incendie, n’exposez cet appareil ni à l’humidité ni à l’eau

(pluie...).

ACHTUNG:

Um Gefährdung durch elektrischen Schlag zu

vermeiden darf das Gerät nicht geöffnet werden. Es befinden

sich keine vom Benutzer reparierbaren Teile im inneren des

Gerätes.Jegliche Reparatur soll einem qualifizierten Fachmann

uberlassen werden.

WARNUNG:

Um die Gefahr eines Feuers bzw. eine Verletzung

durch elektrischen Schlag zu vermeiden sollte das Gerät niemals

Regen oder Feuchtigkeit ausgesetzt werden.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

ATTENTION

RISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

ACHTUNG

GEFAR FUR ELEKTRISCHEN

SCHLAG

GERÄT NICHT ÖFFNEN

DPI SERIES USER MANUAL

2. Safety Instructions



All safety and operation instructions must be read before this

unit is operated.



The safety and operating instructions must be retained with

the unit for future reference.



All warnings on the appliance and in this operation manual

must be strictly followed.



This unit must not be used near water - for example, near

bathtub, washbowl, kitchen sink, laundry tub, in a wet base-

ment, near a swimming pool, etc.



This unit must be placed away from heat sources, such as

radiators or other heat producing devices.



The power supply cord must be routed so that it is not likely

to be stepped on or pinched by objects placed on or against

it.



The power cord of the unit must be unplugged from the mains

outlet if the unit is not used for a longer period.



Care must be taken that objects do not fall and liquids are not

spilled into the inside of the unit.



Unplug the unit and demand servicing by qualified service

personnel under any of the following conditions:

•

Objects have fallen, or liquid has been spilled into the unit;

•

The unit has been exposed to rain;

•

The unit does not appear to operate normally or exhibits a

marked change in performance;

•

The unit has fallen, or its chassis got damaged;

•

The power cord or power plug are damaged.



The user must not attempt to service the unit beyond those

means described in this operating manual. All other servicing

must be referred to qualified personnel.



To prevent electric shock do not use the polarised plug with

an extension cord, receptacle or other mains outlet unless the

prongs can be fully inserted to prevent contact exposure. This

unit is equipped with a single pole disconnect device (fuse) in

the phase (live) wire. If an unpolarised mains connection is

used, the receptacle the unit is connected to must be equipped

with a two pole disconnect device (fuse) of appropriate rating.

The dust filter cover on the front of the unit forms an integral

part of the electrical safety provisions. Do not use the unit

without the dust filter cover in place!



Precautions should be taken so that the grounding and mains

polarisation means of the unit are not defeated.



Slots and openings in the unit are provided for ventilation. To

ensure reliable operation and to prevent overheating of the

unit, these openings must not be blocked or covered!



The fanguard on the front of the unit is an integral part of the

safety provisions of the DPI amplifier. Make sure it is correctly

mounted before connecting the unit to a mains outlet.

3. DPI series Features

DPI series power amplifiers feature:



Switching class D output stage.



Fully symmetrical, and floating modulator for unsurpassed

accuracy and cross channel separation.



Open input architecture for future expansion. The stand-

ard input module PIM-SIM provides

inputs on Neutrik®

Combo connectors or Phoenix screw terminals, parallel link

outputs on XLR-3M for easy routing of multiple amplifiers and

selectable high pass filters with 30 and 50Hz second order

high pass filter characteristic.



Instant recovery, eliminating stitching of the output when

recovering from clipping or overload.



EFL® (Extended Feedback Loop). This inovating technique

makes it possible to take the feedback for the amplifier right

from the loudspeaker terminals, offering unprecedented con-

trol of the loudspeaker, independent on loudspeaker cable

length. The amplifier can be used as a conventional amplifier

without this feature enabled, without any inconveniences.



Defeatable clip limiter with selectable response time.



Minimum sample frequency selection.



Protection against over-dissipation, open or short circuit and

HF or DC at the output.



Outputs on touch proof Neutrik® Speakon connectors and

high current Phoenix® screw terminals. Speakons have

integral sensing inputs for the EFL circuit.



Low flux toroïdal power transformer with thermal sensing.

The output power of the amplifiers is reduced in case of

overheating.



Extensive power line filtering for minimal interference.



Soft start to minimise current surge on power on.



A high efficiency cooling system. The power transistors are

mounted directly onto the heatsink, eliminating the high

thermal resistance of electrical insulators. This reduces

component temperatures and extends the life of the power

components.



Temperature proportional speed fans for quiet operation.



Front to back air flow.



Easy to clean air filter on the front.

DPI SERIES USER MANUAL

4.1 Unpacking the unit

4. Setting up the amplifier

DPI amplifiers are packed in a strong cardboard box that pro

tects it during transport. In case you ever need to ship the ampli-

fier again it is best to pack it using the original packaging materials.

Therefore it is advised to save all packaging materials.

The packaging has been specially studied for low load to the

environment. The individual packaging materials can be easily

separated and recycled.

Please inspect the unit carefully for any signs of damage

incurred during transport. This DPI amplifier has undergone

stringent quality control inspection and tests at the factory. It

left in perfect condition. If damage is found notify the transport

company immediately.

It is important to immediately mount the fanguard that is

included in the box. It is an integral part of the electrical safety

provisions of the unit.

When repacking the unit, use the same packing

arrangement as shown in the picture. Make sure

to remove the fanguard. Place it on the side of the

unit, between the two side buffers. This protects the

fanguard during transport.

Warning: Before continuing the installa-

tion of the DPI amplifier, mount the fan

guard on the front of the unit.

READY / P

ROTECT

SIGNAL

BRIDGE

CLIP / NLR

CH 2

-dB

CH 1

-dB

TEMP LIM

IT / TCL

SUPPLY O

PROFESS

IONAL CLA

SS-D POW

ER AMPLIF

IER

POWER

REMOTE

ACTIVE

CALL

EXAMINE

EQUIPME

NT CARE

FULLY FO

SHIPPING

DAMAGE

IF DAMA

GE IS

FOUND

NOTIFY

THE CA

RRIER

WHO

MADE

DELIVER

DEMAND

INSPECT

ION AND

A SIGNE

D DAMA

REPORT.
THIS PAC

KAGING

IS MADE

FROM FU

LLY

RECYCL

ABLE

MATERIA

LS.

KEEP

PACKAG

ING FO

R FUTU

RE USE

DISPOSE

OF PROP

ERLY.

DPI S

eries

User

manu

Prelim

enary

Profe

ssio

nal P

owe

r Am

plifie

DPI 1

2 x

300 W

DPI 1

2 x

500 W

DPI 2

2 x

800 W

DPI 3

2 x 1.1

00 W

DPI 4

2 x 1.5

00 W

SIG

TIV

Place the two tabs of the fanguard in the corresponding holes

on the right of the unit. Push the fanguard against the front panel

and secure it by turning the /4 turn lock 90° clockwise.

DPI series amplifiers are equipped with two cooling fans with

front to rear airflow. When installing the amplifier, allow for ample

space behind the amplifier to ensure sufficient airflow, especially

if the amplifier is operated in a rack system. This avoids thermal

limiting of the output power or, in severe situations even shut-off

by the thermal protection system.

The fancover can be easilly removed by turning the /4 turn

lock 90° counterclockwise and pulling it off the frontpanel, left

side first.

The standard air filter delivered with the amplifier is a black,

8mm thick reticulated polyurethane foam with a density of 20PPI.

The filter can be easilly cleaned by rinsing it with water. Let it dry

thouroughly before mounting it back onto the amplifier.

In case you need to replace the filter use only the prescribed

material and thickness or contact your distributor for a replace-

ment.

Do not use the amplifier without the airfilter in place.

Regular cleaning of the filter eliminates dust buildup inside the

unit.

4.2 Attaching / removing the fancover

DPI SERIES USER MANUAL

5. Connecting the amplifier

5.1 Familiarisation with the rear panel

Channel output is available on parallel wired Neutrik 4 pole

Speakon and Phoenix screw terminal. Wiring of the Speakon

is as follows:

+ = Channel output positive

- = Channel output negative (ground)

2+ = Channel sense input positive

2- = Channel sense input negative (ground sense)

2 Bridge output is available on Neutrik 4 pole Speakon. Another

possibility to connect the bridge output is to use the Ch and

Ch2 Phoenix OUT+ terminals. In this case Ch OUT+ is the

positive output pole and Ch2 OUT+ the negative. Wiring is

as follows:

+ = Bridge output positive

- = Bridge output negative

2+ = Bridge sense input positive

2- = Bridge sense input negative

OUT + OUT

SENSE

CH1

OUT + OUT

SENSE

CONFIGURATION

CH2

TIO

-S

MAINS FUSE

MAINS INPUT

ATTENTION:

RISQUE

D'INCENDIE! REMPLACEZ

UNIQUEMENT PAR UN

FUSIBLE DE MEME TYPE ET

VALEUR - CONSULTEZ LA

PLAQUE DE MARQUAGE.

WARNING:

TO REDUCE THE RISK

OF FIRE OR ELECTRIC SHOCK DO

NOT EXPOSE THIS EQUIPMENT TO

RAIN OR MOISTURE. NO USER

SERVICEABLE PARTS INSIDE. REFER

SERVICING TO QUALIFIED PERSON-

NEL. READ INSTRUCTION MANUAL

CAREFULLYBEFORE USE.

WARNING:

TO REDUCE THE RISK

OF FIRE OR ELECTRIC SHOCK DO

NOT EXPOSE THIS EQUIPMENT TO

RAIN OR MOISTURE. NO USER

SERVICEABLE PARTS INSIDE. REFER

SERVICING TO QUALIFIED PERSON-

NEL. READ INSTRUCTION MANUAL

CAREFULLYBEFORE USE.

CLASS 1 EQUIPMENT

MUST BE EARTHED!

AVIS

RISQUE DE CHOC

ELECTRIQUE

NE PAS OUVRIR

CAUTION

RISK OF ELECTRIC

SHOCK

DO NOT OPEN

ATTACH TYPE LABELTO THIS LOCATION. THIS

LABEL CONTAINS IMPORTANT SAFETY

INFORMATIONAND MUST NOT BE REMOVED.

REPLACE LABEL IN CASE IT GOT DAMAGED

OR LOST.

CAUTION:

FIRE HAZARD!

REPLACE ONLY WITH SAME

FUSE TYPEAND RATING - SEE

TYPE LABEL.

CH2 ON/OFF

CH2 SLOW

CH1 ON/OFF

CH1 SLOW

CH1 FSMIN

CH2 FSMIN

BRIDGE

LOCK

CLIPLIMITER

BRIDGE MODE:

SWITCHES 1 AND

2 ON USE CH1

INPUT AND LEVEL

CONTROL. CH2

INPUT AND LEVEL

BRIDGE MODE:

SWITCHES 1 AND

2 ON USE CH1

INPUT AND LEVEL

CONTROL. CH2

INPUT AND LEVEL

OUT

SENSE +

SENSE

OUT +

SPEAKON

WIRING

BRIDGE

1 2 3 4 5 6 7 8

Model: DPI 40

Serialnr.: DPI40-01AA-XXXX

Date of manufacture: 28.06.04

Made in Belgium, EU

FUSE: xxx A T / 250 V

Power requirments: 264V AC 50/60Hz 6.000W

3 Channel 2 output. For more information see Ch under point

4 Configuration dipswitches.

5 Peripheral Input Module. DPI series is standard delivered

with the PIM SIM analog input module. Do not operate the

amplifier without the module in place. The PIM module can be

easilly exchanged for versions with more elaborate features.

6 Mains power cord.

7 Fuseholder. Replace fuse only with same fuse type and

rating. This information is found on the type label, attached to

the rear panel.

8 Ventilation slots. Never cover the ventilation slots. These en-

sure reliable operation and prevent overheating of the unit.

DPI series amplifiers are able to work in two main operational

modes that can be selected by the dipswitches (4) on the back

of the unit.

DUAL

mode: in this mode both channels and their correspond-

ing in- and outputs work totally independent from eachother.

This is the mode for normal stereo (two-channel) operation.

In dual mode both switch and 2 are in their UP position.

BRIDGE

mode is activated by setting switches and 2 in

the ON (down) position.

Bridge mode allows to use the amplifiers full output capacity

for one single monaural channel.

This configuration is recommended to produce high power

output for a monaural speaker system, e.g. subwoofer. In ad-

dition to that, any DPI amplifier working in BRIDGE mode can

be directly connected to an unisolated 00V (70V) constant

voltage sound system.

FSMIN selection:

DPI series amplifiers use a variable switch

ing frequency modulator. As the output signal increases in

amplitude, the switching frequency of the modulator goes

5.2 Configuartion (dipswitch setting)

down. Ultimately the switching frequency goes to zero when

the amplifier runs into the supply rails. To avoid this and to

minimise stitching of the output signal after such event, the

modulator continuously monitors the switching frequency

and clips the modulator input signal in case the switching

frequency drops below a predefined value. This value can be

adjusted by the dipswitches 3 and 4 resp. for CH1 and CH2.

Switch in the UP position corresponds to 35kHz. Switch in

the down position to 70kHz. It is almost impossible to hear

any difference between both settings. We advise the 70kHz

position for critical listening. The output power will be a few

percent lower when FSMIN 70kHz is enabled, compared to

the 35kHz setting.

The

CLIP LIMITER

avoids gross clipping of the output signal

in case the FSMIN clipper is activated. Gain is automatically

reduced if the limiter is activated by putting switches 6 (CH2)

and 8 (CH1) in the ON (down) position. Attack and release

times can be adjusted with switches 5 (CH2) and 7 (CH1).

Reaction of the limiter circuit is slowed down by putting these

switches in their ON (down) position.

DPI SERIES USER MANUAL

The DPI series amplifiers have an open input architecture

for future expansion. Standard, the amplifier is equipped with

the PIM-SIM module.

5.3.2 PIM-SIM1 module

. Channel input sockets are mixed XLR/phone jack recepta-

cles, which allow the use of microphone or instrument cables

to connect the amplifier. Whenever possible, use 2-conductor

shielded cable for a balanced signal transmission. This gives

the best results and the lowest noise. The inputs are wired in

standard configuration with pin 1 as ground, pin 2 as signal

“hot” and pin 3 as signal “cold”.

Refer to the input wiring diagram on the amplifier’s back

panel.

Each input XLR/Phone jack is parallel wired to a Phoenix

screw terminal for easy connections as well as to a ‘Direct Out’

male XLR socket to provide easy linking to other amplifiers.

2. Channel 2 input. See Ch information under point .

All input and output sockets are on the rear panel of the

amplifier. The rear panel also holds the mains cord (8) and the

fuse holder (9). For maximum safety, it is recommended to stick

to the order given below when wiring the PA system.

5.3 Connections

5.3.1 Input connections

3. Configuration dipswitches for parallel mode and high pass

filter.

Switches 1 and 2 make it possible to parallel CH1 and CH2

inputs. Put switches in the ON (down) position to wire CH1 and

CH2 inputs in parallel. Use CH1 or CH2 input. The output lev

els can be adjusted individually by means of the corresponding

level controls.

Switch 3 makes it possible to insert a 50Hz second order high

pass filter into CH1 signal path. Put the switch in the ON (down)

position to activate the filter.

Switch 4 controls CH1 high pass filter frequency. With the

switch in the up position the cutoff frequency is 50Hz. The down

position changes this to 30Hz.

Switch 5 controls CH2 high pass filter mode and switch 6

controls CH2 high pass filter cutoff frequency. Functioning is

the same as for CH1.

Warning: All DPI series amplifiers are capable of producing

dangerously high voltages at the output terminals! To avoid

cable overheating, do not use speaker cables under .5 mm2

cross-section (AWG 5). The use of thicker cables helps to keep

power loss down and damping high, especially if long distances

have to be bridged. After insertion, twist each speakon connector

clockwise until latching or lock it with the swivell nut to ensure

proper contact.

DUAL

mode: use the SPEAKER OUT and 2 outputs to con-

nect the speaker systems. Minimum total speaker impedance

per channel is 2 O hms.

BRIDGE

mode: BRIDGED OUT speaker connection is done

by using standard Speakon cables. Minimum total speaker

impedance is 4 Ohms.

5.3.3 Speaker connections

EFL® (Extended Feedback Loop).

This inovating feature makes it possible to take the feed-

back for the amplifier right from the loudspeaker terminals, of

fering unprecedented control of the loudspeaker, independent

on loudspeaker cable length. The amplifier can be used as a

conventional amplifier without this feature enabled, without any

inconveniences by simply not connecting the sense terminals. In

this case feedback is taken right at the speaker output terminals,

compensating any internal wiring, yielding very high low output

impedance.

The sense inputs give access to highly sensitive

electronic components inside the unit.

Although the amplifier is protected against mis

wiring of the sense inputs, these components

are not resistant to continuous fault situations.

CH1

INPUT

LINK / OUT

CH2

INPUT

LINK / OUT

GND

SLEEVE

TIP

RING

GND

INPUT

2 3

CONFIGURATION

INPUT IMPEDANCE: 20K BALANCED

10K UNBALANCED

-1

1 2 3 4 5 6

OUT + OUT

SENSE

CH1

OUT + OUT

SENSE

CH2

TIO

-S

LOCK

OUT

SENSE +

SENSE

OUT +

SPEAKON

WIRING

BRIDGE

Pin configurations

The pin configurations for the three speaker connectors

are printed on the amplifier’s back panel. Before connecting

the speakers, make sure that your speaker cables are properly

wired.

Warning: this mode does not mean that the out-

puts of both channels can be wired in parallel.

Never attempt to wire them together! This can

damage the amplifier.

DPI SERIES USER MANUAL

OUT + OUT

SENSE

OUT + OUT

SENSE

5.3.4 Mains connection

For mains connection, use only three-prong mains connectors

with earth contact. Switching the amplifier to different voltage

systems is done from the inside and should only be performed

by a qualified technician.

The mains cable conductors have the following color code:

YELLOW/GREEN = earth (PE)

BROWN = live (L)

BLUE = neutral (N)

Output cabling for dual (stereo) / parallel (mono) mode:

Preferred Second option

In case the sense inputs are not used leave

them unconnected. The amplifier will then

function as a conventional amplifier.

Extra care is needed in case of 4 core cables

to make sure the sense wires are not con

nected.

In case the sense inputs are used, try the con

nection with a low level signal at the output. If

the channel goes into protect mode check the

wiring for accordance with the figures below.

Continuous operation into a faulty wiring can

DPI SERIES USER MANUAL

Each channel is controlled from the front panel by a level con-

trol potentiometer and 4 status LED’s. The status LED’s indicate

the following operational states of the amplifier:

READY/PROTECT:

two-coloured LED indicates whether or

not the channel is ready to operate. Lights up green when the

amplifier is working normally, and turns red whenever there is a

malfunction, e.g. DC voltage at the output, output stage defect, or

heatsink temperature exceeding 90°C. After turning the amplifier

on, this LED will remain red for about 2 seconds until the internal

supply voltages have set to their normal values.

SIGNAL:

indicates signal presence at the channel’s output.

Threshold level is +0 dBV.

VOLT CLIP / LIMIT:

lights when the amplifier has reached

the minimum switching frequency. This is equivalent to clipping

in a normal power amplifier. In case the internal clip limiter is

activated, the gain will be automatically reduced to prevent the

occurrence of gross nonlinearity conditions inside the amplifier.

The clip limiter keeps signal distortion under 5% and thus

guarantees a clean sound and effective speaker protection.

TCL (Temerature Controlled Limiting):

indicates signal

limiting as a result of heat sink over temperature (above 85°C).

This helps to prevent the triggering of the internal thermal shut-off

circuit, which would step in at 90°C heat sink temperature as a

final safeguarding measure.

The temp limit only becomes active when the regular cool-

ing mechanism fails to work properly, e.g. by a dirty air filter,

obstructed air-flow...

A lit TCL LED should always be taken as a sign to check the

air filter and to assure sufficient cooling air supply.

Further 3 leds give operational information of the unit:

BRIDGE:

Indicates the amplifier is configured for bridge mode

operation. Use CH1 level control as indicated.

SUPPLY OVL:

Indicates a power supply overload. If this LED

is lit, gain of both channels is decreased simultaneously to avoid

overheating of the unit’s power transformer.

REMOTE:

Both the ‘ACTIVE’ LED as the CALL button are

functions which require an optional remote module to be inserted

at the back of the unit. Further explanation of the functions will

accompany the remote module. This function is not available

with the PIM-SIM standard input module.

6. Operation

READY / PROTECT

SIGNAL

BRIDGE

VOLT CLIP / LIMIT

CH 2

-dB

CH 1

-dB

TEMP LIMIT

SUPPLY OVL

DPI SERIES USER MANUAL

For maximum performance we recommend the use of two

conductor shielded cable for making input connections. Because

the shield does not carry audio signal, interference between signal

current and audio current is minimised in this way. While wiring up

your system take following important points into consideration:

. Never use a ground lift adapter on the mains feed. The

isolation system of this product takes into account that the chas-

sis is connected to earth at all times. This product will become

unsafe if the chassis is disconnected from earth.

2. Most installations use a mix of balanced and unbalanced

connections with a variety of equipment being connected. In

case you experience a hum or buzz problem, do not be afraid

to experiment.

Pin of the input connectors (and direct out connectors) is

connected to chassis ground. In a perfect world it would be pos-

sible to simply connect the sleeves of the signal cables to pin

at both ends of the cable. This would in effect make the cable

screen an extension of the chassis between the two intercon-

nected pieces of equipment and provide for perfect LF and HF

screening of the audio signals.

Problem however is that some equipment use badly organised

internal grounding and will generate hum and buzz because of

earth currents flowing through the internal signal ground. In such

case it is necessary to stop the earth currents from flowing by

disconnecting pin from the sleeve.

Use the figures below as a guidance to solve problems with

hum or buzz.

7. Grounding

Source

Output

Amplifier

Input

2-wire mains cord

Floating

Balanced

Source

Output

Amplifier

Input

3-wire mains cord

Grounded

Source

Output

Amplifier

Input

2-wire mains cord

Floating

Unbalanced

3-wire mains cord

Source

Output

Amplifier

Input

Grounded

DPI SERIES USER MANUAL

Model

DPI10 DPI15 DPI20 DPI30 DPI40

Min. output power per channel into 2 ohms

500 W

900 W 200 W 600 W 2200 W

1 kHz sine wave, THD < 1%, both channels driven

Min. output power per channel into 4 ohms

300 W

500 W

800 W 00 W 500 W

1 kHz sine wave, THD < 1%, both channels driven

Min. output power per channel into 8 ohms

200 W

330 W

450 W

600 W

800 W

1 kHz sine wave, THD < 1%, both channels driven

Min. output power in bridge mode into 4 ohms

000 W 800W 2400 W 3200 W 4400 W

1 kHz sine wave, THD < 1%

Min. output power in bridge mode into 8 ohms

600 W 000 W 600 W 2200 W 3000 W

1 kHz sine wave, THD < 1%

Typical THD+N

< 0.02 %

1 KHz -3dB output power

SMPTE intermodulation distortion

< 0.05 %

60 Hz - 7 KHz 4:1 at -3dB output power

Dynamic intermodulation distortion

< 0.05 %

30 KHz bandwidth at -3dB output power

Frequency range

+ 0 dB / - 0.8 dB

20 Hz - 20 kHz at nom. output power

Small Signal Frequency response

5 Hz - 50 kHz

-3dB; Load impedance 2 - 6 Ohms

Large Signal Bandwidth

35 kHz

Rise time

< 10 µs

Damping factor

> 3000 (EFL used)

1 KHz referred to 8 ohms

Voltage gain

+36 dB

Level controls full cw

Noise interference

< -105 dB

22 Hz - 22 KHz rms A weighted, referred to nom. output power

Crosstalk

< -70 dB

1 KHz / 8 ohms

Input CMRR

> 80 dB

100 Hz

Output DC offset voltage

< ±25 mV

Input impedance

0 Kohms unbalanced / 20 Kohms balanced

Input connectors

/4” phone jack / XLR compound receptacle, parallel XLR male

parallelled Phoenix® screw terminals

Output connectors

x 4-pole Speakon per channel / x 4-pole Speakon for bridge

parallelled Phoenix® 4 mm² screw terminals

Cooling

Forced cooling with 2 vari-speed fans / front to rear airflow

Mains supply

115 V / 230 V ±10% AC 50/60 Hz

Dimensions

Width: 482 mm, Height: 88.9 mm, Depth: 350 mm

(mounting base to connector panel)

Net weight

3.5 kg

5 kg

6 kg

8 kg

20 kg

Shipping weight

6.3 kg

8 kg

9 kg

2 kg

23 kg

Standards

Safety: EN60065 EMC: EN5503-/EN5503/2/E2/E3

Note: Distortion measurements with AES-17 low pass filter.

8. Specifications

DPI SERIES USER MANUAL

9. Dimensions

READY / PROTECT

SIGNAL

BRIDGE

VOLT CLIP / LIMIT

CH 2

-dB

CH 1

-dB

TEMP LIMIT

SUPPLY OVL

PROFESSIONAL POWER AMPLIFIER

POWER

OUT + OUT

SENSE

CH1

OUT + OUT

SENSE

CONFIGURATION

CH2

-S

MAINS FUSE

MAINS INPUT

ATTENTION:

RISQUE

D'INCENDIE! REMPLACEZ

UNIQUEMENT PAR UN

FUSIBLE DE MEME TYPE ET

VALEUR - CONSULTEZ LA

PLAQUE DE MARQUAGE.

WARNING:

TO REDUCE THE RISK

OF FIRE OR ELECTRIC SHOCK DO

NOT EXPOSE THIS EQUIPMENT TO

RAIN OR MOISTURE. NO USER

SERVICEABLE PARTS INSIDE. REFER

SERVICING TO QUALIFIED PERSON-

NEL. READ INSTRUCTION MANUAL

CAREFULLY BEFORE USE.

WARNING:

TO REDUCE THE RISK

OF FIRE OR ELECTRIC SHOCK DO

NOT EXPOSE THIS EQUIPMENT TO

RAIN OR MOISTURE. NO USER

SERVICEABLE PARTS INSIDE. REFER

SERVICING TO QUALIFIED PERSON-

NEL. READ INSTRUCTION MANUAL

CAREFULLY BEFORE USE.

CLASS 1 EQUIPMENT

MUST BE EARTHED!

AVIS

RISQUE DE CHOC

ELECTRIQUE

NE PAS OUVRIR

CAUTION

RISK OF ELECTRIC

SHOCK

DO NOT OPEN

ATTACH TYPE LABELTO THIS LOCATION. THIS

LABEL CONTAINS IMPORTANT SAFETY

INFORMATIONAND MUST NOT BE REMOVED.

REPLACE LABEL IN CASE IT GOT DAMAGED

OR LOST.

CAUTION:

FIRE HAZARD!

REPLACE ONLY WITH SAME

FUSE TYPEAND RATING - SEE

TYPE LABEL.

CH2 ON/OFF

CH2 SLOW

CH1 ON/OFF

CH1 SLOW

CH1 FSMIN

CH2 FSMIN

BRIDGE

LOCK

CLIP LIMITER

BRIDGE MODE:

SWITCHES 1 AND

2 ON USE CH1

INPUT AND LEVEL

CONTROL. CH2

INPUT AND LEVEL

BRIDGE MODE:

SWITCHES 1 AND

2 ON USE CH1

INPUT AND LEVEL

CONTROL. CH2

INPUT AND LEVEL

1+
1

2+
2

OUT

SENSE +
SENSE

OUT +

SPEAKON

WIRING

BRIDGE

1 2 3 4 5 6 7 8

CH1

INPUT

LINK / OUT

CH2

INPUT

LINK / OUT

GND

SLEEVE

TIP

RING

GND

INPUT

2 3

CONFIGURATION

INPUT IMPEDANCE: 20K BALANCED

10K UNBALANCED

-1

1 2 3 4 5 6

Model: DPI 40

Serialnr.: DPI40-01AA-0001

Date of manufacture: 28.06.04

Made in Belgium, EU

FUSE: xxx A T / 250 V

Power requirments: 264V AC 50/60Hz 6.000W

445,00

482,60

DPI SERIES USER MANUAL

10. Warranty

SUMMARY

The Q4AUDIO division of Summit Engineering nv Tongersesteenweg 90 3800 Sint-Truiden Belgium, the creators and manufacturers

of the Q4AUDIO product line warrants to you, the original purchaser and any subsequent owner of this Q4AUDIO product, for a period

of 2 (two) years (warranty period) from the date of purchase by the original purchaser that the product is free of defects in components

and factory workmanship. The date of purchase is the date appearing on the first end-user’s sales receipt or other proof of original

purchase from an authorised Q4AUDIO dealer.

ITEMS EXCLUDED FROM WARRANTY

This Q4AUDIO warranty does not cover product failure caused by misuse, accident or neglect. Nor shall it be applicable to any product

on which the serial number has been defaced, altered or removed. This warranty shall be considered void if this product is subjected to

repair work or alteration by persons other than authorised by Q4AUDIO in such a manner as to injure, in the sole judgment of Q4AUDIO,

the performance, stability, reliability or safety of this product. This warranty does not apply to finish or appearance items. This warranty

is in effect only during the warranty period.

OUR COMMITMENT

During the warranty period, Q4AUDIO will remedy any defect (except as excluded) by repair or at its option replacement or refund. In

case of refund the defective or malfunctioning product shall be made available to us free and clear of all lies or other encumbrances. The

refund will be equal to the original purchase price less a reasonable depreciation of 0% per year from the date of purchase. The refund

will not include interests, insurance, closing costs, loss of profit or other financial costs that may be the result of the product’s defect.

OBTAINING WARRANTY SERVICE

You must notify us of your need for warranty service, preferably by filling out the service request form in this manual and returning it to

us. We will give you notice of the authorised service center to whom you may deliver the product or we will give you an authorisation to

return it to the factory. All components must be shipped in a factory pack, shipping prepaid. Repairs and replacement parts provided

under the terms of this warranty shall carry only the unexpired portion of this warranty.

DISCLAIMER

Q4AUDIO is not liable for any damage to other products such as speakers, amplifiers or any other equipment that is caused by using

this Q4AUDIO product.

PRODUCT CHANGES

We reserve the right to change the design on any product without prior notice and with no obligation to make corresponding changes

in products previously manufactured.

Summit Engineering nv

Q4AUDIO division

Tongersesteenweg 90

3800 Sint-Truiden

Belgium

tel: +32 69.42.59

fax: +32 69.45.92

www.Q4audio.com

email: ebergers@summit-eng.be

DPI SERIES USER MANUAL

Service request form

Send this service request form together with the unit (do not send separately!) to your authorised

Q4audio dealer, or to following address:

Summit Engineering NV

Q4audio division

Tongersesteenweg 90

3800 Sint-Truiden Belgium

Tel: +32 (0) 69 42 59

Fax: +32 (0) 69 45 92

Email: service@Q4audio.com

Attempts to solve the problem

Problem description

Be sure to explain the circumstances under which the problem occurred!

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Product information

Product::  ...........................................................................................................................................
Serial number:  ..................................................................................................................................
Purchased from:  ...............................................................................................................................
Purchase date: ..................................................................................................................................

Owner information

Name/Company:  ..............................................................................................................................
Shipping addess:  .............................................................................................................................
..........................................................................................................................................................
Country:  ...........................................................................................................................................
Tel: ....................................................................................................................................................
Fax: ...................................................................................................................................................

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