TheSTA339BWisanintegratedsolutionofdigitalaudioprocessing,digitalamplifiercontrol,andFFX-poweroutputstage,therebycreatingahigh-powersingle-chipFFX®solutioncomprisinghigh-quality,high-efficiency,alldigitalamplification.STA339BWisbasedonFFX(fullyflexibleamplification)processor,anSTMicroelectronicsproprietarytechnology.FFXistheevolutionandtheenlargementoftheSTternarytechnology:thenewprocessorcanbeconfiguredtoworkinternary,binary,binarydifferentialandphaseshiftPWMmodulationschemes.STA339BWcontainstheternary,binaryandbinarydifferentialimplementati***,asubsetofthefullcapabilityoftheFFXprocessor.TheSTA339BWispartoftheSoundTerminal®familythatprovidesfulldigitalaudiostreamingtothespeaker,offeringcosteffectiveness,lowpowerdissipationandsoundenrichment.TheSTA339BWpowersectionc***istsoffourindependenthalfbridges.Thesecanbeconfiguredviadigitalcontroltooperateindifferentmodes.2.1channelscanbeprovidedbytwohalfbridgesandasinglefullbridge,providingupto2x9W+1x20Wofpoweroutput.Twochannelscanbeprovidedbytwofullbridges,providingupto2x20Wofpower.TheICcanalsobeconfiguredas2.1channelswith2x20WprovidedbythedeviceandexternalpowerforFFXpowerdrive.AlsoprovidedintheSTA339BWareafullassortmentofdigitalprocessingfeatures.Thisincludesupto8programmable28-bitbiquads(EQ)perchannelandbass/trebletonecontrol.***ailablepresetsenableatime-to-marketadvantagebysubstantiallyreducingtheamountofsoftwaredevelopmentneededforcertainfuncti***.Thisincludesaudiopresetvolumeloudness,presetvolumecurvesandpresetEQsettings.TherearealsonewadvancedAMradiointerferencereductionmodes.Dual-bandDRCdynamicallyequalizesthesystemtoprovidespeakerlinearfrequencyresp***eregardlessoftheoutputpowerlevel.Thisfeatureindependentlyprocessesthetwobands,controllingdynamicallytheoutputpowerlevelineachbandandsoprovidingbettersoundquality.Theserialaudiodatainputinterfaceacceptsallpossibleformats,includingthepopularI2Sformat.ThreechannelsofFFXprocessingareprovided.Thishigh-qualityconversionfromPCMaudiotoFFXPWMswitchingw***eformprovidesover100dBSNRanddynamicrange.)