Fbt Symbol 12000 User manual

FBT elettronica S.p.A. - Via Paolo Soprani 1 - Zona Ind.le Squartabue - 62019 RECANATI (MC) - ITALY

TEL. 071/750591 r.a. - FAX 071/7505920 - http://www.fbt.it - E-mail : [email protected]

ENGLISH

Professional Stereo Amplifiers

Symbol 18000

Symbol 12000

3-4-5

INDEX

INTRODUCTION

Here are the “no-compromise” power amplifiers ! The new Symbol Power Amplifier series features two models based on a project design

targeted to obtain the most appropriate technical solutions to each and every need of signal amplification. The Symbol 12000 and the

Symbol16000grantstereopoweroutputofrespectively1500Wand2400Wperchannel(into2ohm).

All the steps followed for this project have been directed to the achievement of the maximum performance at every stage of application:

nothing has been saved from this “mission”! The application of Cascode circuits, of over-dimensioned final stages, of highly efficient

techniques such as the use of power supply at 2 or 3 steps and the highest capacity of electricity distribution.... The great quality of these

amplifiers guaranteed by the traditional FBT reliability and the rich equipment of technical features, place the Symbol 12000 and Symbol

18000tothetopoftherangeandconfirmFBT’stargettooffertherightaudiosolutiontoeveryneed.

TECHNICALCHARACTERISTICS:

>XLRconnectorsfor signalinputsandoutputs

>electronicallybalancedinputs

>poweroutputswith4-poleSpeakonconnectors

>facilityforoperation inparallel,monoorstereomodes

>powerlinethermalcut-outprotection

>independentprotectionsoneachchannel

>softstartfunction

>delayedactivationofoutputs

>dualloudspeakerprotectiontosafeguardagainstcontinuous

voltageonoutput(relay)

>short-circuitprotectiononoutputs

>SOAprotection

>clip limiter

>8dual-colourLED’sprovidingcomprehensiveat-a-glance

displayofoperatingmodes

>groundliftswitch

Introduction

Precautions

Unpacking

Warning

Front panel / Rear panel

Controls

Installation

Connections and power-up

Operating modes

Cables and connectors

Block diagram

Technical specifications

Technical glossary

Problems and solutions

PRECAUTIONS

UNPACKING

WARNING

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK

DO NOT REMOVE COVER (OR BACK)

NO USER SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE

- Readthismanualthoroughlyandobservethefollowingprecautionsbeforeworkingwiththeamplifier.

- Takecarenottospillliquidsontotheamplifieranddonotuseitinexcessivelyhumidconditions.

- Do not install the amplifier near heat sources or expose it to direct sunlight and do not install in dusty environments without suitable

protection.

- Donotobstructtheairintakeopeningsorthecoolingfans.

- Ensurethepowersupplyvoltagedoesnotexceedthevalueshownontherearpanel.

- Donotusetheamplifierunlessthemainscableandplugareinperfectcondition(replaceorrepairifnecessary).

- To safeguard against induced interference, do not install the amplifier next to transformers, television sets, RF transmitters, motors or

electricalpowersourcesofanydescription.

-Donotusesolventssuchasacetoneoralcoholtocleantheamplifierorthefinishandpanelletteringwillbedamaged.

- Do not connect output channels to input channels of other appliances and do not connect the CH1 OUT/CH2 OUT power outputs to any

loadotherthantherelativeinputconnectorontheloudspeakers.

- Donotconnectaudioinputstoelectricalpowersourcesofanytype.

- If a fault occurs, consult your nearest FBT service centre or a specialized audio equipment repair service. Do not attempt to repair the

amplifieryourself.

AlthoughallFBTproductsarecarefullyinspectedandtestedbeforeshipment,theycouldbedamagedintransit.Whenremovingthepackingmaterialinspect

theamplifiercarefullyforanysignofdamage.Informyourdealerimmediatelyiftheamplifierisdamagedonarrival.

Keepthe packingmaterial onhand sothat itcan bere-used ifthe amplifiermust beshipped toa servicecentre atany timeor inthe eventof resale.Note that

thistypeofequipmentholdsitsmarketvaluewell,provideditiskeptingoodconditionandcanbesuppliedinitsoriginalpackingtogetherwiththehandbook.

1 8

Symbol Active/PRT

Status/Clip

Ch 2

18000

ULTRA LINEAR

CASCODE CIRCUITS

0 10

Status/Clip

0 10

Active/PRT

Ch 1

Stereo Bridge

Parallel Ground Lift

3 5 7 3

2 4 6 2

STEREO

PARALLEL BRIDGE (CH1)

MADE IN ITALY

GND LIFT

ON ONOFF

Symbol 18000

LINE PROTECT

230 V

BRIDGE

OUTPUTS

2 OHM MIN. 4 OHM MIN. 2 OHM MIN.

Ch 1Ch 2

INPUTS

LINK LINK

Ch 1Ch 2

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

REMOVE COVER (OR BACK) NO USER SERVICEABLE

PARTS INSIDE REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL

10 10 14 1511

9 9 1213

0 10

Active/PRT

Ch 1

FRONT PANEL

REAR PANEL

CONTROLS DESCRIPTION

1]Ch1/Ch2

Volumecontrolknob(Channel1andChannel2).Volumecontrolrangeisfrom0(nosignal)to10(fullvolume).

2]Active/PRT

Dual-colour LED: green indicates that the relative channel can operate correctly; red indicates that a protection

hastrippedandthechannelisonstandby.Protectionsmaytripforthefollowingreasons:

a) overheating: in this case the amplifier will resume normal operation after a brief interruption for cooling

purposes;at this point theLED changesfrom redto green, confirmingthat normaloperating statusof theSymbol poweramplifier hasbeen

restored.

b)inthecaseofafaulttheLEDwillremainredpermanentlyandtheamplifiermustbetakentoaservicecentre.

When the system ispoweredon the LED showsa redlight fora fewseconds, confirmingactivationof the automatic functionprotecting the

loudspeakersfrompowersurgesatstart-up.

OUTPUTS

2 OHM MIN. 2 OHM MIN.

Ch 1Ch 2

INPUTS

LINK LINK

Ch 1Ch 2

Stereo Bridge

Parallel Ground Lift

0 10

Status/Clip

Ch 1

3]Status/Clip

AmplifieroperatingstatusindicatorLED:

- greenindicatesthattheamplifierisfunctioningnormally

-redindicatesthatthesignalhasreachedthesaturationthreshold(clippinglevel)intheamplificationstage(inthis

casereducethevolumebymeansoftheCh1/Ch2(1)controls).

4]Stereo

ThisLEDilluminateswhentheSymbolpoweramplifierisfunctioninginstereomode(refertotheOperatingModeschapter).

5]Parallel

This LED illuminates when the Symbol power amplifier is functioning in parallel mode (refer to the

OperatingModeschapter).

6]Bridge

This LED illuminates when the Symbol power amplifier is functioning in bridge mode (refer to Operating

Modeschapter).

7]Groundlift

ThisLEDilluminatestoindicatethattheamplifierinputgroundisisolatedfromthegroundofconnectedequipment(seedescription-13-).

8] Power switch: In an audio system it is good practice to switch on power amplfiers last and switch them off first to avoid possible signal

peaks.

9]Ch1/Ch2inputs

Inputs with XLR connectors. The inputs are compatible with balanced signals from mixer outputs;

thetwo socketsforeachchannelare connectedinparallelso thatonecanbe used asaninputand

theothertopatchthesignaltoanotheramplifier.

10]Ch1/Ch2outputs

Outputs with Speakon connectors. For connecting loudspeakers to both amplification circuits.

Loudspeakers must have minimum impedance of 2 ohms and power handling of at least 1500W (Symbol

12000)or2400W(Symbol18000).

CONTROLS DESCRIPTION

BRIDGE

OUTPUTS

4 OHM MIN.

STEREO

PARALLEL BRIDGE (CH1)

GND LIFT

ON ONOFF

Symbol 18000

LINE PROTECT

230 V

11]Bridgeoutput

Mono output with Speakon connector. To connect a loudspeaker to both amplifier circuits in BRIDGE mode. The loudspeaker (or array of

loudspeakers connected in series/parallel) must have minimum impedance of 4 ohms and power handling

ofatleast3000W(Symbol12000)or4800W(Symbol18000).

12]Stereo-Parallel-Bridge

Three-position mode selector :STEREO-PARALLEL- BRIDGE (refer to Operating Modes chapter). Use this

selectoronlywhentheamplifierispoweredoff.

13]GNDLIFT

Switch for electrical isolation of the ground circuit from the earth circuit; this function can be used to

eliminatehumcausedbygroundloops.

14]Mainscable

Cablewithplugforconnectiontotheelectricalmainssupply(230V).

15]Lineprotect

Thermal cut-out to disconnect the power supply in the event of excess current absorpotion. To restore normal

operationoftheamplifierpresstheLINEPROTECTbutton.

CONTROLS DESCRIPTIONS

SIDE VIEW

INSTALLATION

CONNECTIONS & POWER UP

DONOTOBSTRUCTTHEAIRINTAKEOPENINGSOREXPULSIONGRILLES

SYMBOL amplifiersaredesignedforrack mounting(twostandard19"rackspaces) andaresuppliedwithfourfixing holeson

thefrontpanelflanges.

Therearpanelfeaturestwopins(A)designedtoengageintherack.

Theamplifierisequippedwithtwocoolingfansoperatingatvariablespeedinrelationtothetemperature.

Forefficientoperationoftheamplifier,ensurethattherearpanelairexpulsiongrillesareunobstructed.

Ifpossible,donotinstalltheamplifierinplacessubjecttodirectsunlight,hightemperatures,highlevelsofdustorhumidity.

Before connecting any other equipment, ensure that the amplifier is powered off and that the power supply data corresponds

tothespecificationsontherearpaneloftheSYMBOLpoweramplifier.

Makesurethevolumecontrolsaresetto0toavoidpossibledamagetotheloudspeakers.

Alsoensurethattheoperatingmodeselectorispositionedasrequired:STEREO,PARALLELorBRIDGE.

N.B.

POWEROFFTHEAMPLIFIERBEFORECHANGINGTHEPOSITIONOFTHEMODESELECTOR

STEREO

PARALLEL

BRIDGE

MIXER

SPEAKER CABINET

SPEAKER CABINET SPEAKER CABINET

SPEAKER CABINET

MIXER

STEREO

PARALLEL

BRIDGE

CH1

STEREOGND LIFT

BRIDGE

OUTPUTS

INPUTS

2 OHM MIN.

LINK LINK

4 OHM MIN. 2 OHM MIN.

PARALLEL

ON ON BRIDGE (CH1)

OFF

230 V LINE PROTECT

MADE IN ITALY

Ch 1

Ch 2

Symbol 18000

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

REMOVE COVER (OR BACK) NO USER SERVICEABLE

PARTS INSIDE REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL

STEREOGND LIFT

BRIDGE

OUTPUTS

INPUTS

2 OHM MIN.

LINK LINK

4 OHM MIN. 2 OHM MIN.

PARALLEL

ON ON BRIDGE (CH1)

OFF

230 V LINE PROTECT

MADE IN ITALY

Ch 1

Ch 2

Symbol 18000

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

REMOVE COVER (OR BACK) NO USER SERVICEABLE

PARTS INSIDE REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL

STEREOGND LIFT

BRIDGE

OUTPUTS

INPUTS

2 OHM MIN.

LINK LINK

4 OHM MIN. 2 OHM MIN.

PARALLEL

ON ON BRIDGE (CH1)

OFF

230 V LINE PROTECT

MADE IN ITALY

Ch 1

Ch 2

Symbol 18000

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

REMOVE COVER (OR BACK) NO USER SERVICEABLE

PARTS INSIDE REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL

OPERATING MODES

When the input signal is stereo, use STEREO mode, selectable

on the rear panel. The left hand and right hand channel signals

must be connected to the amplifier INPUT1 and INPUT2

respectively. The signalwillbeamplifiedinstereoanddeliveredto

the OUT1 and OUT2 outputs; the left-right output balance can be

setusingthetwovolumecontrols.

For mono input signals use PARALLEL mode, selectable on the

rear panel. Mono signals should be connected exclusively to

INPUT1. The mono signal will be amplified by both channels and

delivered to outputs OUT1 and OUT2 at a volume that can be set

independentlyusingthetwovolumecontrols.

Whenworking with a mono input and singleloudspeaker line,you

can use the entire power available from the two output stages by

selecting BRIDGE mode on the rear panel. The signal must be

connected exclusively to INPUT1. The signal will be delivered to

the BRIDGE OUTPUT and amplified with double the available

powerwithrespecttothenormaltypeofconnection.

131+

2- 1-

level

PROTECT OUT

BRIDGE

clip OUT 2

clip OUT 1

AUX

fan

POWER AMP

BOOSTING

POWER SUPPLY

BOOSTING

POWER SUPPLY

POWER AMP

CH2

CH1

BRIDGE

PARALLEL

STEREO

POWER

SUPPLY

CABLES & CONNECTORS

BLOCK DIAGRAM

12 21

Wirings side

Connections side

1. Massa Schermo (Ground) 2. Fase + Caldo (Hot) 3. Fase - Freddo (Cold)

XLR

1+ Positive

1 - Negative

2- 1-

SPEAKON

Alwaysusetopqualitycablesandconnectorswhenconnectingtheamplifieroutputtotheloudspeakersandtheinputstoamixer.

Check cables and connectors before powering on the amplifier; if cables and connectors are damaged, they must be replaced or properly

repairedbeforeusingtheamplifier.

TECHNICAL SPECIFICATIONS

Continuous power both channels driven

Continuous power Bridge mode

Impulsive power both channels driven

Impulsive power Bridge mode

Input sensitivity

Input impedance

Signal to noise ratio

THD

Frequency response

Max current output

Power consumption

Power supply

Protections

Cooling

Dimensions

Weight

Inputs

Slew rate

IMD

Symbol 18000

2x700W rms @ 8 ohm

2x1300W rms @ 4 ohm

2x1800W rms @ 2 ohm

3000W rms @ 8 ohm

4800W rms @ 4 ohm

6400W rms @ 2 ohm

2x800W rms @ 8 ohm

2x1500W rms @ 4 ohm

2x2400W rms @ 2 ohm

2x3200W rms @ 1 ohm

2600W rms @ 8 ohm

3600W rms @ 4 ohm

2 Veff

15k ohm

< 0.02%

< 0.05%

20Hz - 20kHz

80A eff

3500 VA

482 x 88 x 460

XLR-F

482 x 88 x 460

>40V/µS

>110dB “A” weighted

DC/Thermal/SOA/Soft Start

2 variable speed fans 2 variable speed fans

DC/Thermal/SOA/Soft Start

>110dB “A” weighted

>40V/µS

2x550W rms @ 8 ohm

2x900W rms @ 4 ohm

2x1300W rms @ 2 ohm

2000W rms @ 8 ohm

3000W rms @ 4 ohm

4000W rms @ 2 ohm

2x600W rms @ 8 ohm

2x1000W rms @ 4 ohm

2x1500W rms @ 2 ohm

2x2000W rms @ 1 ohm

1800W rms @ 8 ohm

2600W rms @ 4 ohm

1,7 Veff

15k ohm

< 0.02%

< 0.05%

20Hz - 20kHz

60A eff

2700 VA

W RMS

( 1 kHz-4ohm) 1W full power

1W full power

@ ±0.2 dB

(WxHxD) mm

W RMS ( @THD< 0.05% 1kHz)

Symbol 12000

230 V 230 V

Symbol Active/PRT

Status/Clip

Ch 2

18000

ULTRA LINEAR

CASCODE CI RCUITS

0 10

Status/Clip

0 10

Active/PRT

Ch 1

Stereo Bridge

Parallel GroundLift

All power measurements made at 230V

All measurements made using AUDIO PRECISION equipment

Impulsive power measured in accordance with IHF method with 20mS bursts and REPETITION RATE 100mS

Other manuals for symbol 12000

This manual suits for next models

Table of contents

Other Fbt Amplifier manuals

Fbt

Fbt M12 X-4 User manual

Fbt

Fbt MA 6120T-6CD User manual

Fbt

Fbt M12 X4 User manual

Fbt

Fbt MPA 3120 User manual

Fbt

Fbt MMA 3120 User manual

Fbt

Fbt Audio Contractor MMZ 8004 S User manual

Fbt

Fbt MXA 1060 User manual

Fbt

Fbt CHA 1004 User manual

Fbt

Fbt M12 X4 User manual

Fbt

Fbt MXA 3240 User manual

Fbt

Fbt symbol 12000 User manual

Fbt

Fbt MPA 5120 User manual

Fbt

Fbt Audio Contractor MMA 6120-TCD/MP3 User manual

Fbt

Fbt MXA 3120 User manual

Fbt

Fbt SA 2200 User manual

Fbt

Fbt SA 1120 User manual

Popular Amplifier manuals by other brands

ASTRO

ASTRO HVO V40 P operating manual

Marantz

Marantz SUPERSCOPE BLA-545 Service data

NAD

NAD CI980 Quick setup guide

Technics

Technics SE-CH770 Service manual

Harman Kardon

Harman Kardon HK6300 instruction manual

NAD

NAD T975 owner's manual

McIntosh

McIntosh MA6850 Brochure & specs

Electro-Harmonix

Electro-Harmonix ENGLISH MUFF’N manual

Viatron

Viatron Autrix Technical manual

GME

GME GA9800 instruction manual

Atlas

Atlas CP700 Specification sheet

Roland

Roland KC-1000 owner's manual

Pyle

Pyle PFMRA350BW user manual

Advantage

Advantage S-250 manual

IRT Electronics

IRT Electronics DVA-3007 manual

Dimavery

Dimavery BA-100 Series user manual

Sony

Sony XM-S400D operating instructions

Schertler

Schertler ROY X quick guide