BlacklineX USERGUIDE
BlacklineXUserGuideV1.0 19
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Amplification
Choosingapoweramplifier
MartinAudioloudspeakersarecapableofrecreatingmusicaldynamicsaccuratelyandwithincredibleimpactifpowered
correctly.MartinAudioloudspeakerpowerratingsarequotedforAESpower‐along‐termaveragepowerratingwithamuch
closerrelationtoamusicsignalthanothermeasurementstandardssuchasRMS,andPeakpower–ashort‐termburstcapability.
MovingcoilloudspeakerscanberunuptotheirAESpowerratingcontinuouslyanduptothehigherPeakpowerratingfor
transientmusicalpeaks.AllBlacklineXSeriesspeakershaveapeakpowerratingfourtimesthelong‐termAESrating.Ideallyyou
shoulduseanamplifierthatcandeliverthefullpeakratingwithoutriskofclipping.Thishowevermaybebeyondthebudgetfor
manysoagoodcompromiseistoaimforanamplifierthatcandeliveratleasttwicetheAESrating.
ThisisparticularlythecasefortheamplifierdrivinganX8,10,12or15whentheyareusedinconjunctionwithanX210,115or
118asthesubcabinetwillbedeliveringthemajorityoftheenergyintheprogrammaterial.Donothoweverscrimponthe
amplifierdrivingthesubwoofer.
Thisshouldbeacceptableformanyapplicationsbutbeawareofthelimitationsparticularlyifthesystemisusedwith
uncompressedlivemusic.Inparticularitisvitaltoavoidamplifierclipping,thisispossiblythebiggestsinglecauseofdamageto
speakerdrivers.Theclippedwaveformhasacolossalharmonicoutputatultra‐highfrequenciesallbeingdeliveredatthefull
powercapabilityoftheamplifiersospeakerdamageisextremelylikely.
Theamplifierselectiontablebelowwillassistinchoosinganamplifiertosuityourapplicationatanacceptablepricepoint.
GainSettings
Thevastmajorityofprofessionalandevenbudgetamplifiersonthemarketthesedayshaveastandardfronttobackgain
regardlessoftheiroutputpowercapability.Theindustrystandardgainfigureis32dBwhichisagainofX40.Thisfigureisagood
balancebetweenenoughgaintorunthatmajorityofsystemswithouthavingtodrivemixersandanyotherprocessingequipment
atalevelsohighthatthereisariskofclipping,andnottoomuchgainwhichwouldraisethenoisefloorofthesystem.When
usingaDX0.5orothersystemprocessorwhichhasalimiterfunctionyoushouldalwaysusethelimitersettingsshowninthe
parameterchart(seethechapterontheDX0.5SpeakerProcessor).Thelimiterthresholdiscalculatedtoallowthemaximum
levelfromyoursystemwithoutdamageandisbasedonaknownamplifiergainsetting‐32dBbydefault.Forthatreasonitisvital
thatiftheamplifierhasfrontpanelgaincontrolstheyMUSTbesetFULLUP.Loweringthemdoesnotoffermoreprotectionfor
yoursystem,itjustchangesthegainsettingoftheamplifiersoagreaterinputlevelisrequiredtoobtainthemaximumpower
fromtheamp.Thiswillmakethelimiterinthesystemcontrolleruselessasthegainisnolongeratthesettingforwhichthe
thresholdhasbeencalculated.Foroptimumperformancealwaysobservethefollowing;‐
UseaDX0.5orhighqualitysystemprocessor
UsethepublishedParametersfortheBlacklineXrange
Useanamplifierwithagainof32dB(X40)
Alwaysrunfrontpanelgaincontrolsfullup
Avoidamplifiersthatonlyquoteasensitivityrating;"xxdBformaximumoutput"(i.e.nopublishedgainsetting)
RecommendedAmplifiers
Model AES Power
Rating
Peak Power
Rating
Ideal amplifier rating Minimum rating Martin Audio amplifiers
4Ω8Ω4Ω8Ω
X8200W800W1,600W 800W800W400WMA3.0,MA2.8Q
X10250W1,000W2,000W1,000W1,000W500WMA3.0,MA2.0
X12300W1,200W2,400W1,200W1,200W600WMA5.2K,MA5.0Q
X15400W1,600W3,200W1,600W1,600W800WMA9.6K,MA3.0
X115500W2,000W4,000W2,000W2,000W1,000WMA12K,MA5.2K
X118500W2,000W4,000W2,000W2,000W1,000WMA12K,MA5.2K
X210500W2,000W2,000W1,000W1,000W500WMA3.0,MA2.0