Audio Press Box APB-124 SB User manual

APB-124 SB
Press Conference Audio Distribution Amplifier
Owner’s manual
English

Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock, short-circuiting, damages,
re or other hazards. These precautions include, but are not limited to, the following:
Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage to the device or other property.
These precautions include, but are not limited to, the following:
Power supply/Power cord
• Onlyusethevoltagespeciedascorrectforthedevice.Therequiredvoltageisprinted
onthenameplateofthedevice.
• UseonlythespeciedACpoweradaptor.
• Donotplacethepowercordnearheatsourcessuchasheatersorradiators,anddonot
excessivelybendorotherwisedamagethecord,placeheavyobjectsonit,orplaceitina
positionwhereanyonecouldwalkon,tripover,orrollanythingoverit.
Do not open
• Donotopenthedeviceorattempttodisassembletheinternalpartsormodifytheminany
way.Thedevicecontainsnouser-serviceableparts.Ifitshouldappeartobemalfunctioning,
discontinueuseimmediatelyandhaveitinspectedbyqualiedAudioPressBoxservice
personnel.
Power supply/Power cord
• Removetheelectricplugfromtheoutletwhenthedeviceisnottobeusedforextended
periodsoftime,orduringelectricalstorms.
• Whenremovingtheelectricplugfromthedeviceoranoutlet,alwaysholdtheplugitself
andnotthecord.Pullingbythecordcandamageit.
• Toavoidgeneratingunwantednoise,makesurethereis50cmormorebetweentheAC
poweradaptorandthedevice.
• DonotcoverorwraptheACpoweradaptorwithaclothorblanket.
WARNING
CAUTION
Water warning
• Donotexposethedevicetorain,useitnearwaterorindamporwetconditions,orplace
containersonitcontainingliquidswhichmightspillintoanyopenings.
• Neverinsertorremoveanelectricplugwithwethands.
If you notice any abnormality
• Ifthepowercordorplugbecomesfrayedordamaged,orifthereisasuddenlossof
soundduringuseofthedevice,orifanyunusualsmellsorsmokeshouldappeartobe
causedbyit,immediatelyturnoffthepowerswitch,disconnecttheelectricplugfrom
theoutlet,andhavethedeviceinspectedbyqualiedAudioPressBoxservicepersonnel.
• IfthisdeviceortheACpoweradaptorshouldbedroppedordamaged,immediatelyturn
offthepowerswitch,disconnecttheelectricplugfromtheoutlet,andhavethedevice
inspectedbyqualiedAudioPressBoxservicepersonnel.
Location
• Beforemovingthedevice,removeallconnectedcables.
• When setting up the device, make sure that the AC outlet you are using is easily
accessible.Ifsometroubleormalfunctionoccurs,immediatelyturnoffthepowerswitch
anddisconnecttheplugfromtheoutlet.
• Avoidsettingallcontrolstotheirmaximum.Dependingontheconditionoftheconnected
devices,doingsomaycausefeedbackandmaydamagethespeakers.
2

Use only the adaptor included with this
AudioPressBox. Use of a different adaptor may
result in equipment damage, overheating, or re.
Be sure to unplug the adaptor from the outlet
when not using AudioPressBox, or when there
are lightning storms in the area.
To avoid generating unwanted noise, make
sure there is 50 cm or more between the
power adaptor and AudioPressBox.
• Donotexposethedevicetoexcessivedustorvibrations,orextremecoldorheat(such
asindirectsunlight,nearaheater,orinacarduringtheday)topreventthepossibilityof
paneldisgurationordamagetotheinternalcomponents.
• Donotplacethedeviceinanunstablepositionwhereitmightaccidentallyfallover.
Connections
• Beforeconnectingthedevicetootherdevices,turnoffthepowerforalldevices.Before
turningthepoweronoroffforalldevices,setallvolumelevelstominimum.
Handling caution
• WhenturningontheACpowerinyouraudiosystem,alwaysturnonthepoweramplier
LAST,toavoidspeakerdamage.Whenturningthepoweroff,thepowerampliershould
beturnedoffFIRSTforthesamereason.
CAUTION
• Donotinsertyourngersorhandsinanygapsoropeningsonthedevice.
• Avoidinsertingordroppingforeignobjects(paper,plastic,metal,etc.)intoanygapsor
openingsonthedeviceIfthishappens,turnoffthepowerimmediatelyandunplugthe
powercordfromtheACoutlet.ThenhavethedeviceinspectedbyqualiedAudioPressBox
servicepersonnel.
• Donotusethedeviceorheadphonesforalongperiodoftimeatahighoruncomfortable
volumelevel,sincethiscancausepermanenthearingloss.Ifyouexperienceanyhearing
lossorringingintheears,consultaphysician.
• Donotrestyourweightonthedeviceorplaceheavyobjectsonit,andavoiduseexcessive
forceonthebuttons,switchesorconnectors.
XLR-typeconnectorsarewiredasfollows(IEC60268standard):pin1:ground,pin2:hot(+),andpin3:cold(-).
AudioPressBoxcannotbeheldresponsiblefordamagecausedbyimproperuseormodicationstothedevice,ordatathatislostordestroyed.
Alwaysturnthepoweroffwhenthedeviceisnotinuse.
Theperformanceofcomponentswithmovingcontacts,suchasswitches,volumecontrols,andconnectors,deterioratesovertime.ConsultqualiedAudioPressBoxservicepersonnelabout
replacingdefectivecomponents.
Illustrationshereinareforexplanatorypurposesonly,andmaynotmatchactualappearanceduringoperation.
Companynamesandproductnameshereinaretrademarksorregisteredtrademarksoftheirrespectivecompanies.
Specicationsanddescriptionsinthisowner’smanualareforinformationpurposesonly.AudioPressBoxreservestherighttochangeormodifyproductsorspecicationsatanytimewithoutprior
notice.Sincespecications,equipmentoroptionsmaynotbethesameineverylocale,pleasecheckwithyourAudioPressBoxdealer.
3

Dearcustomer,
Thank you for purchasing AudioPressBox® APB-448 SB, the most sophisticated press conference distribution amplier. Signal from four
lectern’smicrophonesorlineinputs(i.e.mixingconsole)isdistributedtoindependentmicrophone/lineoutputsusedbymultiplejournalists,TV
Cameraoperators,audiorecordersandreportersatthesametime.Nomorehasslewiththemultiplemicrophonesonthetableordisturbing
late-comingreporters.WithAudioPressBox®youaresetinaminutewithprovidingtheperfectsignaltoeveryreporter!
Unpacking your AudioPressBox®
YourAudioPressBox®comestoyoupackagedinthetransferboxwiththellingmaterialinusedtoavoidanydamagecausedbytransport.
Inthepackage,youshouldnd:
1) Powersupplywithmainscable
2) AudioPressBox®
3) Thismanual
Pleasebecarefulwhileunpackingallthecomponentsfromoriginalpackaging.
Using your AudioPressBox®
UsingeveryAudioPressBox®modelissimpleanditcanbepresentedin4simplesteps:
1) Plugyourmicrophonein
2) Setyourlevels
3) Connectyouroutputs/extenders
4) StartusingyourAudioPressBox®byprovidingperfectlyprocessedsignaltoevery
 recipient,whoconnectshisdeviceintotheoutputsection.
APB-124SB
4

APB-124SB-Frontpanel(Inputsection)
5
Gain
Input HPF Comp. Osc. Audio Press Box APB-124SB
Output
level GR
Phantom
Phones DC 24V 1A
Charge Power
Clip
On
+ 12
+ 6
0
6
12
- 24
- 48
3 dB
6 dB
12 dB
18 dB
100%
50%
25%
Low
Battery
Power
On
Off
Off
Mic
Line
160 Hz
80 Hz
On
Off
On
Off
10
19
15
14
17
11
5
3
20
6
2
4
1
7 8 9 12 16
12
APB-124 SB

6
rumble like a microphone handling noise or pops.
Youhave2possiblelow-cutfrequencies–80Hzand
160Hz.Theoneyouchoosedependsonthesound,
youwanttolterout.Youcanchecktheresultwith
yourheadphonespluggedin.
8. Compressor/Limiter operation switch
Toprovideperfectoutputsignalwithoutclippingor
distortion,youcanswitchtheCompswitchON. If
youswitchthisOFF,signalinoutputcouldcontain
signalclippingordistortion.
9. Test signal oscillator operation switch
Totestsignallevel,whichiscomingtotheoutputs,
youcanswitchthisTest1kHzsinesignaloscillator
on.Afterrecipientssetthelevelsintheirrecording
devices,youshouldswitchthisfunctionOFF.When
compressorswitchissettoON,outputsignallevel
won’texceedthismaximumoutputlevel.
10. Output level indicator bar
Youcanvisuallymonitorthelevelofoutputsignalin
7-segmentoutputindicatorbar.
11. Gain Reduction indicator bar
IfCompswitchissettoON,youcanvisuallymonitor
the level of Gain reduction on this 4-segment
indicatorbar.
12. Headphones output connector
If you want to monitor the output by your
headphones, you can plug them to this connector
(6.3TRS/Jackstereoconnector).
13. Headphones output level knob
If you have your headphones plugged in, you can
adjustthelevelofmonitoringtheoutputbyturning
thisknobtosetyourcomforthearinglevel.Pleasebe
Front panel (Input section)
1. Input XLR microphone/line connector
Inputyourmicrophoneorline-levelsourceintothis
XLRbalancedconnector.Youcanconnectanytype
ofcondensereitherdynamicmicrophonehere.
2. Phantom power switch
Ifyouareabouttousecondensermicrophone,turn
PhantompowerswitchONtofeedyourmicrophone
with 24/48V. If you are using dynamic microphone
ormicrophonewithhisownpower,youcanswitch
thisOFF.
3. Phantom power indicator
IfthePhantompowerison,thisisindicatedwithsolid
redlight.
4. Mic/Line input switch
Ifyouareusingmicrophoneasaninput,thisswitch
should be set to “Mic” position. If you are using
inputfromthemixingconsoleorCDplayer,please
setthisswitchto“Line”position.
5. Input gain level knob
After connecting your microphone, you can set
the input level to reach perfect understanding of
lectern’sspeech.
6. Input peak clip indicator
If the input level is set too high, this indicates a
possibility of distorted input signal. When this red
light continuously lights, please lower your input
level by adjusting Input gain level knob until the
indicatorstopstolight.
7. High-Pass Filter switch
This switch helps to avoid distributing low-end
carefulwhensettingthelevels,toohighmonitoring
volumescandamageyourhearingability!
14. Rechargeable battery charging status
indicator bar(*functionalwithoptionalrechargeable
batterypackBP2000installed)
If the battery pack is installed inside the Audio
PressBox®,youcanseethechargelevelsonthis
indicator. When two lights are on together, this
means, the charge level is somewhere between
thesetwovalues(when100%and50%areon,this
meansthatchargelevelissomewhereabout75%).
15. Battery operation indicator
IfAudioPressBox®runsonbatteries,thisindicator
lightsup.
16. Power ON indicator
WhenAudioPressBox®is turnedon,thisindicator
lightsup.
17. Power switch
With the power switch, you can turn your Audio
PressBox®ONorOFF.
19. Power supply connector
Plugthepowersupply to Audio PressBox®here.
If you have a model with built-in rechargeable
battery, you can recharge your Audio Press Box®
connecting the device to the mains and then you
canrunupto12hourswithoutneedofelectricity.
20. Input link
Inputlinkisaparalleloutputconnectortotheinput
connector. It can be used if you need to connect
more APBs on parallel for more outputs, but they
arefeedwiththesamesignal.Youcanlinkupto4
unitstogether.

APB-124SB-Toppanel
23) Mic/Line level select switch
YoucansetifyouwanttogetMic(-20dBu)orLine(+6dBu)
levelfromindividualoutput
22) Group A Mic/Line Outputs 1-24 + Group B Mic/
Line Outputs 1-24
Mic level output XLR connectors – every output is
individuallytransformerisolated.
7
Balanced Isolated Outputs
Mic Level -20dBu
Line Level +6dBu
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
Mic Line Mic Line Mic Line Mic Line
Mic Line Mic Line Mic Line Mic Line
Mic Line Mic Line Mic Line Mic Line
Mic Line Mic Line Mic Line Mic Line
Mic Line Mic Line Mic Line Mic Line
Mic Line Mic Line Mic Line Mic Line
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AudioPressBox APB-124SB

Get your AudioPressBox® operational:
1. PlugmainscabletoconnectoroftheAudioPressBox®(20).
2. TurnAudioPressBox®onbyswitchingPowerswitch(19)ON.
3. PlugyourmicrophoneintoinputXLRconnector(1).
4. Ifyouareusingcondensermicrophone,switchPhantompower(2)ON.
5. SwitchComp(7)ON
6. SpeaktothemicrophonesandadjusttheInputgain(5)leveltogetvisualconrmationonmicrophonesignallevelindicator(9)
 asyouspeak,thisindicatorwilllightupcontinuously.
7. Setroutingpathforeachmicrophone(11)
8. Ifyouwanttohearyouroutputsignal,plugyourheadphones(with6.3mmTRSconnector)toheadphoneconnector(16)andadjustmonitoringlevel(17)tolistentotheoutput.
9. Recipientscanplugtheirrecordingdevicestospeciedoutputsintheextenders.
10. Youarereadytogo!
Good to know:
What are compressor and limiter?
Theseelementsautomaticallycontrolyoursignalandprovidethebestsignalconditionforeveryoutput.Youwillgetperfectsignalwithoutclippingordistortion.Youcanswitchthis
elementonoroffforeachinputdependingyourneeds.
What is the signal generator for?
Asignalgenerator,alsocalledatestsignalgeneratorisanelectronicdevicedesignedtoproducesinesignal-frequencyof1kHz,whichcanhelptosetyourlevelscorrectly.
8

Specications
9
Audio Press Box APB-124 SB
Type 1 in 24
Groups 1
Input section
Inputs 1
Input connectors Balanced, XLR
Max. input level Limiter ON Limiter OFF
Mic: -10/-30dBu Mic: -2/-42dBu
Line: +36/-4dBu Line: +24/-16dBu
Phantom Voltage 24V
Input Impedance Mic: 2,4 kOhm Line: 3,5 kOhm
Output section
Outputs 24 MIC/LINE level
Output connectors Balanced, XLR
Nominal Output Level +6dBu
Maximum Output Level +20dBu (no load)
+14dBu (600kOhm)
Output impedance Mic: 220 Ohm Line: 600 Ohm
Transformer isolated outputs: Yes (each output)
SNR 86dB
Frequency Response 80/160Hz (fi lter) to 30kHz/-1dB
Controls Mic/Line PAD, Input gain, Phantom, High-pass filter, Compressor, Oscillator, Phones level, Power, Output PAD
Indicators Input clip, Phantom power, Output level, Gain reduction, Power, Battery status (with battery option)
Power Supply 24V DC, 300mA external adaptor
Battery Li-Ion, 14,4V 2200mAh (optional)
Battery Operation Time min. 12hrs
Dimensions (WxHxD) 325x88x175mm
Weight 4kg

Jacklist
InputandOutputJacks Polarities Congurations
MICINPUT
Pin1:Ground
Pin2:Hot(+)
Pin3:Cold(–)
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Blockdiagram
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








 
 






  











 

 













 







 


e-mail: [e-mail] | web: www.audiopressbox.com
MediaTech Central Europe, a.s., Drienova 34, 821 02 Braslava, Slovak Republic (EU)
Tel: [phone] | Fax: [phone]