Specification Sheet

3
Stereo Multiband Sound Processor / Loudness Maximizer / Limiter
SPL3220
Controls
(10)
(2) (3) (4) (5) (1)(6) (7)(8)
(12) (11)
(9)
(1) IN/OUT switch
Thisswitchactivatestherelaysandengagesbothchannels.Theswitch
hasa”hard-bypass”function.Thismeansthatwhentheswitchisnot
depressed(OUT)ortheunitisturnedo,theinputtooutputconnections
aredirect.TheIN/OUTswitchisusedtomakedirectA/Bcomparisons
betweensourcematerialandtheproccesor’seectedsignal.
(2) THRESHOLD control
ThiscontroldeterminesthethresholdpointoftheCompressor/Leveller
withinarangefrom-40to+20dBu.Thecontrolfunctioncorresponds
exactlytothethresholdfunctionfoundinsimplebroadbanddevices.
(3) LEVELLERcontrol
ThiscontrolisusedtomixintheLevellerfunction.Forthemajorityof
applications,thiscontrolshouldbesettocenterposition;theLeveller
willcompensateforvaryinglevelsintheprogrammematerialinorderto
achieveaconsistentcompression.
(4) RATIO control
Theratiocontroldeterminestheratiobetweentheinputandoutput
levelforallsignalsexceedingthethresholdpoint.Thecontrolrangecan
beadjustedfrom1:1to6:1.
(5) PROGRAMswitch
Withthisswitchyoudeterminethecrossoverfrequencyofthetwo
bandsbetweenmusic(500Hz)andspeech(2kHz).Forcomplexsignals
werecommendthemusic(500kH)settingwhereasspeech(2kHz)is
preferabletoprocessindividualvocalsandinstruments.
(6) OUTPUTcontrol
TheOUTPUTcontrolallowsfortheincreaseordecreaseoftheoutput
signalbyamaximumof20dB.Thus,alevellossduetothecompression
orlimitingprocesscanbecompensatedfor.
(7) LIMITERcontrol
Thiscontrolsetstheabsolutepointbywhichtheoutputsignalisnot
allowedtogobeyond.LOandHILIMITLEDsindicatetheactivityofthe
individuallimiters.
(8) GAINREDUCTIONmeters
The8-LEDGAINREDUCTIONmetersindicatethecurrentgainreduction
appliedbytheindividualbandswithinarangefrom0to30dB.
(9) INPUT/OUTPUT LEVELmeters
DependingonthesettingoftheIN/OUTswitch,these8-LEDmeters
informyoueitherabouttheinputortheoutputlevelandmonitorthem
withinarange-30to+15dBu.IfnottheIN.OUTswitchissettoOUT.
theinputlevelisonitored,ifsettoIN,themetersreadtheoutputlevel.
Thmetercalibrationisreferencedto+4dBu.
(10) MAINS CONNECTOR
Pleaseusetheenclosedmainscabletoconnecttheunittotthemains
powersupply.
(11) INPUT A/B
ThesearetheSPL3220LineLevelaudioinputs.
(12) OUTPUT A/B
ThesearetheSPL3220LineLevelaudiooutputs.