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NUMBERS

 IN

 THIS

 SECTION

 REFER

 TO

 THE

 NUMBERED

 

CONTROLS

 OPPOSITE

1) 

POWER

 INDICA

TOR

This

 LED

 indicates

 that

 the

 amp

 is

 

powered

 on

 normally

, and

 should

 be

 capable

 of

 producing

 an

 au

-

dio

 signal

 in

 concert

 with

 the

 attached

 speakers.

  If

 this

 light

 and

 

the

 signal

 light

 (#4)

 are

 both

 lit,

 yet

 no

 sound

 is

 present,

 there

 is

 

a fault

 condition,

 possibly

 blown

 loudspeakers.

 If

 this

 light

 is

 on

 

but

 the

 signal

 light

 (#4)

 is

 un-lit,

 this

 indicates

 that

 there

 is

 no

 

signal

 present

 at

 the

 input

 of

 the

 amplifier

, or

 the

 amplifier

 input

 

section

 is

 damaged.

2) 

PROTECT

This

 Amber

 LED

 turns

 on

 when

 there

 is

 a

 fault

 

condition

 in

 the

 system

 causing

 circuitr

to 

engage

 in

 order

 to

 

protect

 the

 amplifier

 and

 prevent

 it

 from

 damaging

 itself

 and/

or

 the

 attached

 speaker(s).

  The

 most

 common

 cause

 of

 this

 is

 

running

 the

 amplifier

 at

 or

 near

 its

 maximum

 output

 level

 for

 a 

ver

y long

 time.

  If

 protection

 is

 engaged

 because

 of

 overheating,

 

the

 best

 course

 of

 action

 is

 to

 turn

 down

 the

 level

 control

 on

 the

 

amplifier

 for

 long

 enough

 (10-15

 minutes)

 to

 allow

 it

 to

 cool

 

off.

  After

 this

 time

 if

 the

 amp

 no

 longer

 turns

 on,

 it

 should

 be

 

turned

 off

 for

 10

 seconds

 and

 then

 turned

 on

 again.

  If

 it

 still

 

does

 not

 operate,

 contact

 your

 authorized

 ser

vice

 provider

 or

  

B-52

 Pro-Audio.

3) 

LIMIT

This

 LED

 indicates

 the

 signal

 input

 is

 high

 enough

 

to 

drive

 the

 amplifier

 into

 compression.

  

Compression

 is

 the

  

artful

 limiting

 of

 the

 signal

 volume

 at

 the

 input

 stages,

 to

 prevent

 

the

 other

wise

 gross

 distortions

 that

 result

 from

 driving

 the

 power

 

amplification

 beyond

 its

 design

 limits.

4) 

SIGNAL: 

This

 LED

 indicates

 the

 presence

 of

 audio

 at

 the

 input

 

stage

 of

 the

 amplifier

.  If

 this

 light

 is

 not

 lit

 the

 sound

 will

 be

 ver

low

 or

 nonexistant.

 

5) 

LE

vEL

 C

ONTROL

Sets

 the

 volume

 of

 the

 ACT

-1515X(F)

 

without

 influencing

 the

 level

 at

 the

 output

 XLR

 send.

6) 

OUTPUT

:  

This

 connector

 is

 shorted

 to

 the

 INPUT

 allowing

 

daisy

 chaining

 of

 the

 input

 signal.

 Therefore

 you

 do

 not

 need

 

to 

y-cable

 out

 of

 your

 mixer

 or

 audio

 device

 to

 get

 an

 addi

-

tional

 full

 range

 signal(s)

 to

 another

 active

 system

 nearby

 your

  

ACT

-1515X(F)

 speaker

 system.

  

Use

 this

 connector

 to

 “daisy

 

chain”

 multiple

 systems

 together

. (See

 diagram

 on

 page

 6

 for

 

details)

7) 

INPUTS

:  

This

 XLR

 connector

 accepts

 a 

balanced

 input

 signal

 

cable.

  Balanced

 means

 the

 signal

 is

 referred

 to

 a 

ground

 whose

 

voltage

 is

 always

 centered

 between

 the

 voltage

 present

 on

 pins

 

and

 3.

 The

 wiring

 conforms

 to

 the

 Audio

 Engineering

 Society

 

standard

 where

 Pin

 2 

is 

(+)

 or

 hot;

 Pin

 3 

is 

(-)

 or

 cold;

 and

 Pin

 1 

is 

the

 Shield

 or

 ground.

 

8) 

EAR

TH 

GROUND: 

DO

 NOT

 DEFEA

T THE

 EAR

TH

 GROUND

 IF

 

AN

 ELECTRICAL

 STORM

 IS

 IMMINENT!!

  Use

 the

 feature

 only

 with

 

great

 caution.

  Defeating

 the

 Earth

 ground

 may

 in

 some

 instances

 

reduce

 or

 eliminate

 hum

 due

 to

 unavoidable

 ground

 loops.

  It

 

also

 disconnects

 the

 amplifier

 panel

 from

 the

 third

 prong

 of

 the

 

AC

 cable.

  That

 prong

 will

 lessen

 the

 chance

 of

 lethal

 voltages

 

being

 present

 on

 the

 amplifier

 panel

 should

 there

 be

 a 

lightning

 

strike

 or

 other

 catastrophic

 failure

 on

 the

 AC

 mains

 power

 line.

  

Lifting

 the

 Earth

 ground

 means

 a 

person

 in

 contact

 with

 the

 am

-

plifier

 panel

 in

 such

 an

 event

 has

 a

 greater

 likelyhood

 of

 dying

 

in 

the

 event

 of

 such

 a 

catastrophic

 fault.

  DO

 NOT

 LIFT

 THE

 EAR

TH

 

GROUND

 UNLESS

 YOU

 CAN

 ASSURE

 NO

 ONE

 WILL

 COME

 INTO

 

CONT

ACT

 WITH

 THE

 AMPLIFIER

 PANEL

 DURING

 USE.

    

9) 

POWER 

ON/OFF 

SWITCH

Turns

 on

 the

 AC

 mains

 

power

 and

 your

 ACT

-1515X(F)

 amplifier

. If

 power

 is

 available

 

and

 the

 amp

 is

 working

 properly

, the

 Power

 ON/OFF

 switch

 will

 

light

 up.

  If

 it

 does

 not,

 unplug

 the

 AC

 cable

 from

 the

 wall

 and

 

then

 check

 the

 AC

 mains

 fuse

 in

 your

 ACT

-1515X(F)

 for

 conti

-

nuity

 with

 a

 multimeter

 or

 ohmmeter

.  

If 

the

 fuse

 is

 open

 (no

  

continuity)

 replace

 with

 same

 kind

 and

 type.

  

If 

the

 replace

-

ment

 fuse

 blows

 in

 short

 order

, seek

 ser

vice

 from

 a

 qualified

  

technician.

10)

 Po

WE

Cor

Co

NNECT

or:

 

For

 attachment

 of

 the

 in

-

cluded

 IEC

 standard

 detachable

 power

 cord.

 Please

 replace

 this

 

cord

 should

 it 

become

 chafed,

 cut,

 bent

 or

 damaged

 in

 such

 a 

way

 

that

 the

 protective

 insulation

 is

 compromised.

  

TOUCHING

 LIVE

 EXPOSED

 WIRES

 ON

 THE

 POWER

 CORD

 CAN

  

RESUL

T IN

 INJUR

OR

 DEA

TH!

  Only

 replace

 the

 cable

 with

 the

 

exact

 same

 type

 and

 size.

11) 

FUSE

 H

OLDER

House

 a

 8

 amp

 (115

 V

olts)

 or

 4

 amp

 

(230

 V

olts)

 3AB

 size

 slow-blow

 fuse.

  

REPLACE

 ONL

WITH

 

SAME

 KIND

 !!!!

 NOTE!!!

  

Ver

often

 a

 blown

 fuse

 is

 a

 symp

-

tom

 of

 a

 serious

 problem

 with

 the

 amplifier

 or

 speaker

. Under

 

normal

 operating

 conditions

 the

 fuse

 should

 NEVER

 go

 open.

 It

 

does

 so

 only

 under

 fault

 conditions.

  

Take

 extreme

 care

 with

  

household

 electricity

 as

 it 

has

 the

 potential

 for

 deadly

 harm.

  Do

 not

  

expose

 the

 amplifier

 inside

 by

 removing

 the

 amp

 from

 the

  

cabinet

 and

 then

 plugging

 it 

into

 AC

 mains

 power

.  V

oltages

 present

 

on

 the

 printed

 circuit

 board

 can

 be

 lethal!

  If

 the

 fuse

 repeatedly

 

blows,

 especially

 on

 first

 powering

 up

 the

 amp,

 it

 is

 an

 indicator

 

of 

a fault

 condition

 and

 the

 AC

 mains

 power

 should

 be

 removed

 

and

 the

 entire

 system

 should

 be

 brought

 into

 a 

qualified

 ser

vice

  

technician

 for

 repair

 VOL

TAGES

 PRESENT

 ON

 THE

 PRINTED

  

CIRCUIT

 BOARD

 WHILE

 THE

 AMP

 HAS

 AC

 MAINS

 POWER

 SUPPLIED

 

TO

 IT

 ARE

 POTENTIALL

Y LETHAL

 !!

Содержание ACT-1515X(F)

Страница 1: ......

Страница 2: ...rdprong Earthground istopreventsuchharm 14 To reduce the risk of fire or electric shock do not expose the ACT 1515X F to rain or moisture 15 Servicing may be required when the ACT 1515X F has been damaged If any of the following conditions listed below has occurred please turn off and unplug the ACT 1515X F and seek the help of qualified service personnel The following conditions all require servi...

Страница 3: ... works best for you Since the best setting will depend on a number of factors there is no one correct answer for this question Those factors influencing the best choice of crossover point are Spectral distribution of the music Relative efficiency of subwoofer vs full range system Maximum power available to full range and subwoofer system Low frequency compression of subwoofer Room acoustics Positi...

Страница 4: ...ol off After this time if the amp no longer turns on it should be turned off for 10 seconds and then turned on again If it still does not operate contact your authorized service provider or B 52 Pro Audio 3 LIMIT This LED indicates the signal input is high enough to drive the amplifier into compression Compression is the artful limiting of the signal volume at the input stages to prevent the other...

Страница 5: ...s available and the amp is working properly the Power ON OFF switch will light up If it does not unplug the AC cable from the wall and then check the AC mains fuse in your ACT 1515X F for conti nuity with a multimeter or ohmmeter If the fuse is open no continuity replace with same kind and type If the replace ment fuse blows in short order seek service from a qualified technician 10 Power Cord Con...

Страница 6: ...k the firmness of the connection of the AC Power cord in both the wall and the IEC panel mount socket Unplug the AC cord and check the fuse for continuity with a multimeter or ohm eter If fuse is blown replace it with the same type and size and then plug AC cord back into the wall outlet If fuse blows again or Power on rocker switch fails to light service is required 2 NO SOUND Is power present Is...

Страница 7: ...ervice or parts to repair damage caused by accident disaster misuse abuse over powering negligence inadequate packing or shipping procedures and ser vice repair or modifications of the amplifier which has not been authorized or approved by E T I This warranty is in lieu of all other expressed warran ties If this product is defective in materials or workmanship as warranted above your sole remedy s...

Страница 8: ...8 B 52 PROFESSIONAL 3383 Gage Avenue Huntington Park CA 90255 Phone 323 277 4100 Fax 323 277 4108 National 1 800 344 4ETI Internet www B 52PRO com E mail info B 52PRO com ...

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