Clever Acoustics SL 120 100V User Manual

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USER MANUAL

SL 120 100V 120W Slave Amplifier

SL 240 100V 240W Slave Amplifier

SL 350 100V 350W Slave Amplifier

Order code: CRAM11

Order code: CRAM12

Order code: CRAM13

www.cleveracoustics.co.uk

WARNING

FOR YOUR OWN SAFETY, PLEASE READ THIS USER MANUAL CAREFULLY

BEFORE YOUR INITIAL START-UP!

CAUTION!

Keep this equipment away from rain,

moisture and liquids.

SAFETY INSTRUCTIONS

Every person involved with the installation, operation & maintenance of this

equipment should:

Be competent

Follow the instructions of this manual

CAUTION! TAKE CARE USING THIS EQUIPMENT!

HIGH VOLTAGE-RISK OF ELECTRIC SHOCK!!

Before your initial start-up, please make sure that there is no damage caused during

transportation. Should there be any, consult your dealer and do not use the equipment.

To maintain the equipment in good working condition and to ensure safe operation, it is

necessary for the user to follow the safety instructions and warning notes written in this

manual.

Please note that damages caused by user modifications to this equipment are not

subject to warranty.

IMPORTANT:

The manufacturer will not accept liability for any resulting damages caused

by the non-observance of this manual or any unauthorised modification to the

equipment.

• Never let the power-cable come into contact with other cables. Handle the

power-cable and all mains voltage connections with particular caution!

• Never remove warning or informative labels from the equipment.

• Do not open the equipment and do not modify the equipment.

• Do not switch the equipment on and off in short intervals, as this will reduce the

system’s life.

• Only use the equipment indoors.

• Do not expose to flammable sources, liquids or gases.

• Do not carry the unit with only one handle. Always carry using both handles.

• Always disconnect the power from the mains when equipment is not in use or

before cleaning! Only handle the power-cable by the plug. Never pull out the plug

by pulling the power-cable.

• Make sure that the available voltage is between 220V-240V.

• Make sure that the power-cable is never crimped or damaged. Check the

equipment and the power-cable periodically.

• If the equipment is dropped or damaged, disconnect the mains power supply

immediately.

Have a qualified engineer inspect the equipment before operating again.

• If the equipment has been exposed to drastic temperature fluctuation (e.g. after

transportation), do not switch it on immediately. The arising condensation might

damage the equipment. Leave the equipment switched off until it has reached

room temperature.

• If your product fails to function correctly, discontinue use immediately. Pack the

unit securely (preferably in the original packing material), and return it to your

Prolight dealer for service.

• Only use fuses of same type and rating.

• Repairs, servicing and power connection must only be carried out by a qualified

technician. THIS UNIT CONTAINS NO USER SERVICEABLE PARTS.

• WARRANTY; One year from date of purchase.

• If this equipment is operated in any other way, than those described in this

manual, the product may suffer damage and the warranty becomes void.

• Incorrect operation may lead to danger e.g.: short-circuit, burns, electric shocks.

• Do not endanger your own safety and the safety of others!

Incorrect installation or use can cause serious damage to people and property.

This 100V line slave amplifier was designed specifically for use in permanent audio

installations, where reliability and premium sound quality are a must. Highly rugged

construction and high efficiency design make this amplifier perfect for continuous duty

applications in situations were power will be left on for indefinite periods of time.

This 100V line amplifier is warranted from defects for one year from the date of purchase.

Should your amplifier require service, either within or beyond that warranty period, please

contact your Prolight Dealer.

This unit includes a host of features, along with an impressive list of specifications, which

are detailed over the next pages. Please take the time to read this document completely

prior to installation of this product.

Slave amplifier series are designed to suit all PA system application in schools, offices and

stor

Features

• 70V, 100V and 4-16Ω loudspeaker outputs

• Balanced XLR line input

• Unbalanced 6.35mm jack line input

• Balanced XLR line output

• Unbalanced 6.35mm jack line output

• Temperature, clip and short circuit protection

• Power, signal, clip, protection and temperature LEDs

• GND/lift switch to prevent ground loop hum

• Fan cooled

• 24V DC and 240V AC inputs for maximum flexibility

Specifications

SL 120

SL 240

SL 350

Power output:

120Wrms / 135W

peak

240Wrms / 255Wpeak 350Wrms / 375Wpeak

Speaker outputs:

70V, 100V & 4-16

Ω

70V, 100V & 4-16

Ω

70V, 100V & 4-16

Ω

Sensitivity:

775mV (0dB)

S/N ratio:

>105dB

Frequency response:

50Hz-18kHz

THD:

<1% @ 1kHz, 1/3

rated power

<1% @ 1kHz, 1/3

rated power

<1% @ 1kHz, 1/3

rated power

Controls:

Power, volume, GND,

LIFT

Power, volume, GND,

LIFT

Power, volume, GND,

LIFT

Indications:

Power, signal, clip,

temp and protect

Power, signal, clip,

temp and protect

Power, signal, clip,

temp and protect

Protection:

AC fuse, short circuit,

clipping and high

temperature

AC fuse, short circuit,

clipping and high

temperature

AC fuse, short circuit,

clipping and high

temperature

Power consumption:

200W

400W

500W

DC power supply:

24V DC

AC power supply:

240V-60Hz

Dimensions (H x W

x D):

88 x 484 x 353mm

132 x 484 x 408mm

Weight:

9.3kg

13.2kg

14.5kg

Order code:

CRAM11

CRAM12

CRAM13

SL 350

SL120, SL 240

SL 350

Rack Installation

The SL Series are rack mountable. The rack you use should be a double door rack where you can

open the front and rear panel. When mounting the amplifier into the rack, please make sure that

there is enough space around the amplifier.

Be careful when mounting the amplifier into the rack. Put the heaviest products into the lower

part of the rack. Be aware that fastening the amplifier with four screws on the front panel is not

enough.

Inputs

Short cables runs improve the sound quality remarkably. Input cables should be short and direct,

since high frequencies will mostly be absorbed if the cables are unnecessarily long. Besides that

a longer cable may lead to humming and noise problems. If the cable runs are unavoidable, you

should use balanced cables.

Outputs

The high damping factor of your amplifier supplies a clear sound reproduction. Unnecessarily long

and thin cables used for low impedance (4-16Ω) speakers will influence the damping factor and

thus the low frequencies in a negative way.

Connect your speaker systems via the speaker terminals (COM = -VE)

Examples: 1) COM + 4-16Ω

2) COM + 70V

3) COM + 100V

Note: Please do not use more than one pair of output terminals

Identification:

1. Power LED -

This LED will light up once the amp is switched on

2. SIGNAL LED -

This LED will light up when signal is being received

3. CLIP LED -

This LED will flash when the output signal starts to distort. A this point turn the

master volume anti-clockwise to prevent damage.

4. PROT LED -

This LED will illuminate when the unit goes into protect mode. Switch off the

amplifier and check the output connections for faults or short circuits before powering on and

resuming operation.

5. TEMP LED -

Temperature LED will illuminate when overheating. Switch off the amplifier

and leave to cool down.

6. FAN Ven

t - Don not obstruct, keep clear of dust

7. On/off power switch -

Use the switch to power the unit on or off

8. Master volume control -

Use this control to increase or decrease the master volume

9. Carry handles

10. GND/LIFT switch -

Switch to “GND” position when one unit is used, switch lift “LIFT” when

several units are used to avoid noise caused by several earth

line grounded.

11. DC LED -

This LED will light up when optional DC power supply is used

12. FAN Vent -

Do not cover to avoid overheating

13. Speaker outputs -

Use these to connect the speakers

14. XLR input -

Use this to connect signal input from mixer amplifiers

15. 6.35mm mono jack input -

Use this to connectsignal input from mixer amplifiers

16. 6.35mm mono jack link -

Use this to link out to additional slave amplifiers

17. XLR link -

Use this to link out to out to additional slave amplifiers

18. 24V DC connections

- Use this to connect to your optional 24V DC power supply

Connections To The Mains

Before connecting the amplifier to the local mains voltage outlet should be checked to ensure the

available supply is 240V~AC 50Hz. This product is CLASS1 and requires a protective mains earth

to be connected at all times. DO NOT remove or disconnect the earth.

Power On/Off Procedure

After connecting your amplifier to the mains, turn all controls counter clockwise to the “min”

position. Turn on audio sources (MP3 players, CD players, Microphones etc) before powering the

amplifier ON. The last product to be switched on is the amplifier.

If you wish to power off the system, turn the amplifier’s master volume control counter clockwise

to the “min” position before switching the amplifier OFF before any audio sources are switched off.

By following this procedure it will prevent acoustic shocks to the speakers or potential damage to

system components.

Machine operation

1. After connecting all audio source and powering on the power amplifier, adjust the and the

master volume.

2. The Clever Acoustics amplifier features output signal LED with PEAK indication. Should the

PEAK indicator illuminate (flashing) the output of the amplifier is too high, turn the master volume

anti-clockwise to reduce the output.

3. The Clever Acoustics amplifier all features protection with LED indication. Should the

PROTECT indicator illuminate, turn the master volume control anti-clockwise fully and switch off

the amplifier for 15 seconds as the amplifier may have entered PROTECT mode temporarily due

to a peak signal, care should then be taken to ensure all input levels are set correctly. If the

amplifier persists to enter PROTECT mode the amplifier should be switched off and left to cool

for 5-10 minutes before switching back on. If the PROTECT indicator remains lit this indicates a

problem with the amplifier or amplifier load (ie Short Circuit).

4. Speaker & Amplifier systems can produce high sound pressure levels, please operate all

controls with caution to ensure people are not exposed to excessive or dangerous sound pressure

levels.

Panel Connections:

SL 120, 240, 350

MAINS

SLAVE AMPLIFIER

MIXER AMPLIFIER

XLR BAL

1-GND

2-HOT+

3-COLD-

CHIME ACTIVE

+48V PHANTOM

ON OFF

PRIORITY

MIC 1

GAIN

CHIME

2 TONE

4 TONE

REMOTE MIC

240V 50Hz

T6.3AL 250V

MIC 2

GAIN

+48V PHANTOM

MIC 3

GAIN

+48V PHANTOM

MIC 4

GAIN

+48V PHANTOM

TEL

VOLUME

INPUT

LINE 1

OUT

LINE 2

LINE

TEL

EMC

INPUT

OUTPUT

ZONE 5

ZONE 4

ZONE 3

ZONE 2

ZONE 1

COM 100V

100V

70V

COM

BATTERY SUPPLY

24V

16A

24V DC INPUT

(Optional)

PRE OUTPUT

Speaker connections:

WARNING!

Be sure to attache the supplied terminal cover attached after con-

nection. Because high voltage is applied to the speaker terminals,

car should be taken never touch these terminals to avoid

electric shock.

All speaker connections should be made using bare wire or suitable

insulated crimp terminals. Please ensure no loose strands are present

as these may short across terminals causing damage to the amplifier

Notes:

• Both the 4 - 16Ω, 70V and 100V terminals cannot be used at the same time.

• Impedances indicated in the figures represent the total speaker system (load) impedances.

Loads presented to the amplifier must be equal to or greater than listed above. Speaker

impedances must be measured using a true impedance meter, do not standard multimeters.

Total impedance

41Ω (SL 120)

20Ω (SL 240)
14Ω (SL 350)

Total impedance

83Ω (SL 120)

42Ω (SL 240)
28.6Ω (SL 350)

Balanced XLR Jack Connection

Connection With The Mains

Connect the unit to the mains via the IEC mains

inlet using the 13A UK - IEC cord supplied.

The earth has to be connected.

Switch the unit on. After switching on the speaker system, wait 8 - 10 seconds before you turn the

volume control up in order to avoid speaker damage.

CAUTION!

Increase the level of each channel up to the point where the clip LEDs illuminate.

Always check the sound pressure level with a meter in order to keep to the legal threshold.

Cleaning

and

Maintenance

We recommend a frequent cleaning of the product. Please use a soft lint free and moistened

cloth. Never use alcohol or solvents.

There are no serviceable parts inside the product except for the fuse. Maintenance and service

operations are only to be carried out by authorised dealers.

Replacing the fuse

Only replace the fuse by a fuse of the same type and rating.

Before replacing the fuse, unplug the mains lead.

Should you need any spare parts, please use genuine parts.

Should you have any further questions, please contact your dealer.

CAUTION - DANGER TO LIFE

DISCONNECT FROM THE MAINS BEFORE

STARTING MAINTENANCE OPERATION

Problem Chart

CAUSE

The power cord is not connected

The power cord of the respective

product is not connected properly or

not at all.

The connection socket or the plug

is dirty.

The input signal is too strong

Load impedance is to low

REMEDY

Check the power cord and any
extension cables

Check the power cord and if the

plugs are properly connected with

the sockets.

Clean the socket and/or the plug.

Reduce the input signal via the

gain control.
Check load impedance vs amplifier

specification, reduce as required.

PROBLEM

No Power

No Sound

Noise

Distorted Sound

www.cleveracoustics.co.uk

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