OPERATION MANUAL

dB 0

dB 0

ZENITH SERIES

This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance.

The information provided in this manual was deemed accurate as of the publication date. www.prolight.co.uk

Important Safety Instructions

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

4) Follow all instructions.

5) Do not use this apparatus near water.

6) Clean only with a dry cloth.

7) Do not block any ventilation openings.

Install in accordance with the

manufacturer s instructions.

8) Do not install near any heat sources

such as radiators, stoves, or other

apparatus that produce heat.

9) Protect the power cable from being

walked on or pinched, particularly at

plugs, and the point where they exit

from the apparatus.

10) Only use attachments/accessories

specified by the manufacturer.

11) Unplug this apparatus during lightning

storms or when unused for long periods

of time.

12) Refer all servicing to qualified service

personnel. Servicing is required if the

unit has been damaged in any way, e.q.

damaged power cable, liquid , moisture

or foreign objects have fallen inside the

unit or the unit has been dropped.

13) To reduce the risk of fire or electric shock,

do not expose this apparatus to rain or

moisture.

TO PREVENT ELECTRIC SHOCK DO NOT

REMOVE TOP OR BOTTOM COVERS. NO USER

SERVICEABLE PARTS INSIDE. REFER SERVICING

TO QUALIFIED SERVICE PERSONNEL.

MAGNETIC FIELD

CAUTION! Do not locate sensitive high gain equipment such as pre-amplifiers or tape decks dirctly above or below the unit. Because this amplifier has a high power density, it has a strong magnetic field which can induce hum into unshielded devices that are located nearby.

The field is strongest just above and below the unit.

If an equipment rack is used, we recommend locating the amplifier(s) in the bottom of the rack and the pre-amplifier or other sensitive equipment at the top.

WATCH FOR THESE SYMBOLS:

The lightning bolt triangle is used to alert the user to the risk of electric shock.

The exclamation point triangle is used to alert the user to important operating or maintenance instructions.

Professional Power Amplifier

page 2

Operation Manual

Professional Power Amplifier

CE Declaration of Conformity

Equipment Type: Audio Power Amplifiers

Model Names: ZENITH 2K5

This product has been assessed against the following applicable Standards,

EMC (89/336/EEC Electromagnetic compatibility):

EN55013:2001 Sound and television broadcast receivers and associated equipment - Radio disturbance characteristics - Limits and methods of measurement

EN 55020:2002 Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement

EN 61000-3-2:2000

Part 3-2: Limits - Limits for harmonic current emissions (equipment input current up to and including 16 A per phase)

EN 61000-3-3:1995

Part 3-3: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current 16 A per

phase and not subject to conditional connection

LVD (73/23/EEC Low Voltage Directive)

EN60065:2002 Audio, Video and similar electronic-safety requirements.

Operation Manual

page 3

Table of Contents

Important Safety Instructions .......................................................2

Declaration of Conformity ............................................................3

1 Welcome .................................................................................5

1.1 Features ...............................................................................5

1.2 How to Use This Manual ..........................................................5

2 Setup ......................................................................................6

2.1 Unpack Your Amplifier ............................................................6

2.2 Install Your Amplifier .............................................................6

2.3 Ensure Proper Cooling ............................................................6

2.4 Choose Input Wire and Connectors ...........................................7

2.5 Choose Output Wire and Connectors .........................................7

2.6 Wire Your System ...................................................................8

2.6.1 Stereo Mode .......................................................................8

Professional Power Amplifier

2.6.2 Parallel Mono Mode.....................................................................9

2.6.3 Bridge-Mono Mode ...........................................................10

2.6.4 Low Cut Mode.....................................................................10

2.6.5 Low Pass Mode..................................................................10

2.6.6 limiter Mode..................................................................10

2.7 Connect to AC Mains .............................................................11

2.8 Start up Procedure ................................................................11

3 Operation ..............................................................................12

3.1 Precautions ........................................................................ 12

3.2 Front Panel Controls and Indicators ...................................... 13

3.3 Back Panel Controls and Connectors...................................... 13

4 Advanced Features and Options ...............................................14

4 Advanced Features and Options ...............................................15

page 4

Operation Manual

Professional Power Amplifier

dB 0

Zenith 3000

dB 0

ZENITH 2K5

2-ohm Stereo 1250W

4-ohm Stereo 900W

8-ohm Stereo 540W

4-ohm Bridge-Mono 2500W

8-ohm Bridge-Mono 1800W

*1KHz Power:refers to maximum average power in watts at 1KHz with 1.0% THD.

1 Welcome

The ZENITH Series of power amplifiers from

represents a new era in affordable, quality power amplification.

Modern power amplifiers are sophisticated pieces of engineering capable of producing extremely high power levels. They must be treated with respect and correctly installed if they are to provide the many years of reliable service for which they were designed.

In addition, ZENITH Series amplifiers include a number of features which require some explanation before they can be used to their maximum advantage.

Please take the time to study this manual so that you can obtain the best possible service from your amplifier.

1.1 Features

Accurate, uncoloured sound with very low distortion for the best in music and voice reproduction.

Bridge-mono/stereo mode switch allows your amplifiers/speakers to be set up in the configuration that best suits your needs.

Advanced protection circuitry guards against shorted outputs, open circuits,

DC, mismatched loads, general overheating, high-frequency overloads and Internal faults.

Extremely versatile, handling a wide range of speaker impedances and outputs.

Limit Switch

Low Cut by 24dB/Octave Linkwitz-Riley

Filter

Low Pass by 24dB/Octave Linkwitz-Riley

Filter

Switchable input sensitivity.

Proportional speed fan optimizes cooling efficiency.

Can be mounted in standard ch r ack, or stacked on top of each other.

Features both standard 4-way binding posts and genuine Neutrik Speakon output connectors. XLR inputs.

1.2 How to Use This Manual

This manual provides you with the necessary information to safely and correctly setup and operate your amplifier. It does not cover every aspect of installation, setup or operation that might occur under every condition.

We strongly recommend you read all instructions, warnings and cautions contained in this manual.

Operation Manual

page 5

2 Setup

2.1 Unpack Your Amplifier

Please unpack and inspect your amplifier for any damage that may have occurred during transit. If damage is found, notify the transportation company immediately. Save the shipping carton as evidence of damage for the shipper s inspection.

We also recommend that you save all packing materials so you will have them if you ever need to transport the unit. Never ship the unit without the factory packaging.

YOU WILL NEED (not supplied):

Input wiring cables

Output wiring cables

Rack for mounting amplifier (or a stable surface for stacking)

WARNING: Before you start to set up your amplifier, make sure you read and observe the Important Safety Instructions found at the beginning of this manual.

2.2 Install Your Amplifier

CAUTION: Before you begin, make sure your amplifier is disconnected from the power source, with the power switch in the off position and all level controls turned completely down (counterclockwise).

Use a standard 19-inch (48.3 cm) equipment rack .

See Figure 2.1 for amplifier dimensions.

You may also stack amps without using a cabinet.

NOTE: When transporting, amplifiers should be supported at both front and back.

Professional Power Amplifier

2.3 Ensure Proper Cooling

When using an equipment rack, mount units directly on top of each other. Close any open spaces in the rack with blank panels. DO NOT block front, rear or side air vents. The side walls of the rack should be a minimum of two inches (5.1 cm) away from the amplifier sides, and the back of the rack should be a minimum of four inches (10.2 cm) from the amplifier back panel.

dB 0

dB 0

483.0 mm

462.0 mm

Figure 2.1

Dimensions

page 6

Operation Manual

Professional Power Amplifier

2 Setup

2.4 Choose Input Wire and Connectors

recommends using pre-built or professionally wired, balanced line (two-conductor plus shield), cables and connectors. Depending upon which amplifier input you choose, you should use either 3-pin male XLR connectors, or jack connectors for the amplifier inputs.

Unbalanced line may also be used but may result in noise over long cable runs.

Note: Amplifier input connectors not used for audio signal input may be used for the daisy-chaining of the audio signal to other components.

Figure 2.2 shows connector pin assignments for balanced wiring, and Figure 2.3 shows connector pin assignments for unbalanced wiring.

NOTE: Custom wiring should only be performed by qualified personnel.

2.5 Choose Output Wire and Connectors

recommends using pre-built or professionally wired, high quality, two or four-conductor, heavy gauge speaker wire and connectors. You may use two 4-pole

Speakon connectors (Figure 2.4 and Table 1) or banana plugs, To prevent the possibility of short-circuits, wrap or otherwise insulate exposed loud speaker cable connectors.

Figure 2.2

Balanced Input

Connector Wiring

Figure 2.4

Left: Speakon Output Connector on Back Panel

Right: Speakon Cable Connector

Operation Manual

CAUTION: Never use shielded cable for output wiring.

Figure 2.3

Unbalanced Input

Connector Wiring

OUTPUT ASSIGNMENT

OUTPUT A

PIN 1+ :

PIN 1- :

SIGNAL

GROUND

OUTPUT B

PIN 1+ :

PIN 1- :

SIGNAL

GROUND

BRIDGE

Use both red Binding Posts

page 7

2 Setup

2.6 Wire Your System

2.6.1 Stereo Mode

Typical input and output wiring is shown in Figure 2.5.

Professional Power Amplifier

LINK A INPUT A

PIN1:

PIN2:

PIN3:

SIGNAL GND

SIGNAL +

SIGNAL -

LINK B INPUT B

OFF 35Hz

HIGH PASS -A

80Hz STEREO PARALLEL BRIDGE

MODE

1.4V

32dB

GAIN

26dB

OFF 80Hz

LOW PASS -A

110Hz

OUTPUT A

BRIDGE

ZENITH 2K5

8

4

2 stereo stereo stereo

OFF

HIGH PASS -B

35Hz 80Hz

OFF

LOW PASS -B

80Hz 110Hz ON

LIMITER

OFF LIFT

GROUND

GROUND

www.prolight.co.uk

OUTPUT B

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

OUTPUT ASSIGNMENT

PIN 1+ : SIGNAL

PIN 1- : GROUND

Push To Reset

~2202 40V 10A 50/60Hz

page 8

Figure 2.5

System Wiring, Stereo Mode

SPEAKERS

Operation Manual

Professional Power Amplifier

2 Setup

2.6.2 Parallel Mono Mode

Typical input and output wiring is shown in Figure 2.6.

LINK A INPUT A

PIN1:

PIN2:

PIN3:

SIGNAL GND

SIGNAL +

SIGNAL -

LINK B INPUT B

OFF 35Hz

HIGH PASS -A

80Hz STEREO PARALLEL BRIDGE

MODE

1.4V

32dB

GAIN

26dB

OFF 80Hz

LOW PASS -A

110Hz

OUTPUT A

BRIDGE

ZENITH 2K5

8

4

2 stereo stereo stereo

OFF

HIGH PASS -B

35Hz 80Hz

OFF

LOW PASS -B

80Hz 110Hz ON

LIMITER

OFF LIFT

GROUND

GROUND

www.prolight.co.uk

OUTPUT B

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

OUTPUT ASSIGNMENT

PIN 1+ : SIGNAL

PIN 1- : GROUND

Push To Reset

~2202 40V 10A 50/60Hz

Operation Manual

Figure 2.6

System Wiring, Parallel Mode

SPEAKERS

page 9

2 Setup

2.6.3 Bridge-Mono Mode

2.6.4 Low Cut Filter

Low Cut Filter cuts signal frequency below

30/80Hz or 50Hz

2.6.5 Low Pass Filter

Low Pass Filter allows only frequencies below

80Hz or 125Hz without the use of external crossovers when driving subwoofers.

2.6.6 Limiter

Prevents serious clipping when the over driven.

er is

Professional Power r

LINK A INP UT A

P IN1:

P IN2 :

P IN3 :

S IGNA L GND

S IGNA L +

S IGNA L -

LINK B INP UT B

OF F 3 5 Hz

HIGH PAS S -A

8 0 Hz S TE R E O PAR ALLEL B R IDGE

M ODE

1.4 V 3 2 dB

GA IN

2 6 dB

OF F 8 0 Hz

LOW PAS S -A

110 Hz

O UTPUT A

BRIDG E

Z E NITH 2 K 5

8

4

2 s tereo s tereo s tereo

X

X

2 1250W

OF F

HIGH PAS S -B

3 5 Hz 8 0 Hz

OF F

LOW PAS S -B

8 0 Hz 110 Hz ON

LIM IT E R

OF F LIF T

GR OUND

GR OUND

www.prolight.co.uk

O UTPUT B

CAUTION

R IS K O F E L E C TR IC S HOC K

DO N OT O P E N

!

OUTP UT A S S IGNMENT

P IN 1+ : S IGNA L

P IN 1- : GR OUND

Push To Re se t

~ 2 2 02 4 0 V 1 0 A 5 0 /6 0 Hz

page 10

SPEAKERS

Figure 2.7

System Wiring, Bridge-Mono Mode

Operation Manual

Professional Power Amplifier

2 Setup

2.7 Connection to AC Mains

Connect your amplifier to the AC mains power source

(power outlet) with the supplied AC power cable. First, connect the IEC end of the cable to the IEC connector on the amplifier; then, plug the other end of the cable to the AC mains.

WARNING: The third prong of this connector(ground) is an important safety feature. Do not attempt to disable this ground connection by using an adapter or other methods.

The AC mains voltage and current must be sufficient to deliver the power you expect. You must operate your amplifier from an AC mains power source with not more than a 10% variation above or a 15% variation below the amplifier s specified line voltage and within the specfied frequency requirements (indicated on the amplifier s back panel label). If you are unsure of the output voltage of your AC mains, please consult an electrician.

2.8 Startup Procedure

Use the following procedure when first turning on your amplifier:

1. Turn down the level of your audio source.

2. Turn down the level controls of the amplifier.

3. Turn on the Power switch. The Power

indicator should glow.

4. Turn up the level of your audio source to an

optimum level.

5. Turn up the Level controls on the amplifier until

the desired loudness or power level is achieved.

6. Turn down the level of your audio source to its

normal range.

If you ever need to make any wiring or installation changes, do not forget to disconnect the power cable.

Operation Manual

page 11

3 Operation

3.1 Precautions

Your amplifier is protected from internal and external faults, but you should still take the following precautions for optimum performance and safety:

1. Before use, your amplifier first must be configured for

proper operation, including input and output wiring

connection. Improper wiring can result in serious

operating difficulties.

2. Take care when making connections, selecting signal

sources and controlling the output level.

3. Do not short the ground lead of an output cable to the

input signal ground. This may form a ground loop and

cause oscillations.

Professional Power Amplifier

4. WARNING: Never connect the output

to a power supply, battery or power

output. Electrical shock may result.

5. Tampering with the circuitry, or making unauthorized

circuit changes may be hazardous and invalidates your

warranty.

6. Do not operate the amplifier with the red Clip LEDs

constantly flashing.

7. Do not overdrive the mixer, which will cause a clipped

signal to be sent to the amplifier. Such signals will be

reproduced with extreme accuracy, and loudspeaker

damage may result.

8. Do not operate the amplifier with less than the rated

load impedance. Due to the amplifier s output prot-

ection, such a configuration may result in premature

clipping and speaker damage. Remember: is not

liable for damage that results from over-driving other

system components.

page 12

Operation Manual

Professional Power Amplifier

3 Operation

3.2 Front Panel Controls and Indicators

dB 0

dB 0

3.3 Back Panel Controls and Connectors

LINK A INPUT A

PIN1:

PIN2:

PIN3:

SIGNAL GND

SIGNAL +

SIGNAL -

LINK B INPUT B

OFF 35Hz

HIGH PASS -A

80Hz STEREO PARALLEL BRIDGE

MODE

1.4V

32dB

GAIN

26dB

OFF 80Hz

LOW PASS -A

110Hz

OUTPUT A

BRIDGE

ZENITH 2K5

8

4

2 stereo stereo stereo

OFF

HIGH PASS -B

35Hz 80Hz

OFF

LOW PASS -B

80Hz 110Hz ON

LIMITER

OFF LIFT

GROUND

GROUND

www.prolight.co.uk

OUTPUT B

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

OUTPUT ASSIGNMENT

PIN 1+ :

PIN 1- :

SIGNAL

GROUND

Push To Reset

~2202 40V 10A 50/60Hz

Operation Manual

page 13

4 Specifications

page 14

Minimum Guaranteed Power

1 kHz with 0.5% THD

Stereo, 2 ohms (per ch.)

Stereo, 4 ohms (per ch.)

Stereo, 8 ohms (per ch.)

Bridge mono, 4 ohms

Bridge mono, 8 ohms

Performance

Sensitivity (volts RMS) for full rated power at 8 ohms

Frequency Response (at 1 watt, 20Hz - 25 kHz)

Phase Response (at 1 watt , 20Hz to 20 kHz)

Signal to Noise Ratio below rated power

A-weighted

Total Harmonic Distortion (THD) at 1 full bandwidth power, from 20 Hz to 20 kHz

Intermodulation Distortion (IMD) 60 Hz and 7 kHz at 4:1, from full rated output to -35 dB

Damping Factor (8 ohm): 20 Hz to 400 Hz

High pass:Linkwitz-Riley(24dB/Octave)

Low Pass:Linkwitz-Riley(24dB/Octave)

Crosstalk (below rated power, 20 Hz to 20 kHz)

Common Mode Rejection (CMR)(20 Hz to 1 kHz)

DC Output Offset (Shorted input)

Input Impedance (nominally balanced, nominally unbalanced)

Voltage Gain (at maximum level setting)

ZENITH 2K5

1250W

900W

540W

2500W

1800W

ZENITH 2K5

0.775V, 32dB, 26dB

+0dB, -0.5dB

+10 ,-20

107dB

0.1%

0.05%

700

Off/35Hz/80Hz

Off/80Hz/110Hz

-60dB

-65dB

10mV

20 kilohms, 10 kilohms

38.8dB gain at 0.775volt sensitivity

Professional Power Amplifier

Operation Manual

Professional Power Amplifier

4 Specifications

Load Impedance (Note: Safe with all types of loads)

Stereo

Bridge Mono

AC Line Voltage and Frequency Configurations Available ( 10%)

AC Line Current (both amplifiers draw no more than 90 watts at idle)

Construction

Ventilation

Cooling

Dimensions

Weight

Net

Shipping

2-8 ohms

4-8 ohms

~220-240 V and 50/60 Hz

10A

ZENITH 2K5

Flow-through ventilation from front to back

Proportional speed fan

H W D: 89mm 483mm 496mm

23kg

26kg

Operation Manual

Page 15

www.prolight.co.uk