JBL SUB500 Service Manual

Contents

JBL SUB 500 150W Powered Sub/ Plate AmpLINE VOLTAGE Yes/No Hi/Lo Line Unit NotesUS 120VAC/60Hz Yes 108-132 Vrms Normal OperationAsia 100VAC/50Hz Yes 90-110 Vrms Normal OperationEU 230VAC/50-60Hz Yes 207-264 Vrms Normal Operation Normal operation, MOMS requiredParameter Specification UnitQA TestLimits Conditions NotesAmp SectionType (Class AB, D, other) D D N/ALoad Impedance (speaker) 4 Ohms N/A NominalRated Output Power 150 Watts 140 1 input drivenTHD@ Rated Power 0.5 % 1 22KHz filterTHD @ 1 Watt 0.1 % 0.3 22KHz filterDC Offset 10 mV-DC 50 @ Speaker OutputsDamping factor >100 DF 30Measured at speaker terminals, Outputpower 140 Watts THD 0.1 %Input SensitivityInput Frequency 50 Hz 50 Nominal Freq. 1 input drivenLine Input (L&R) 250 mVrms ±2dB To rated power 1 input drivenLFE Input 145 mVrms ±2dB To rated power LFE input driven onlySpeaker/Hi Level Input 2.5 Vrms ±2dB To rated power (-20 dB below Line In)...1 input drivenSignal to NoiseSNR-A-Weighted 100 dBA 85 rel. to rated power A-Weighting filterSNR-unweighted 90 dBr 80 rel. to rated power 22KHz filterSNR @ 1W-unweighted 60 dBr 55 rel. to 1W Output 22KHz filterResidual Noise Floor 1 mVrms 2Volume @max, using RMS readingDMM/VOM (or A/P)Residual Noise Floor 1 mVrms(max) 2Volume @max, w/ A/P SweptBandpass Measurement (Line freq.+harmonics)Input ImpedanceLine input L&R , LFE >10 K ohms N/A NominalSpeaker/Hi Level Input 4.7 K ohms N/A NominalFiltersLeft & Right Low Pass fixed Hz -- ±2dBSlope & Q 4th dB/Octave N/ALFE Low Pass fixed Hz -- ±2dBSlope & Q 2nd dB/Octave N/ASubsonic filter (HPF) Hz -- ±2dBSlope & Q 2nd dB/Octave N/ALimiter (yes/no) YES -- N/ATHD at Max. Output Power N/A -- N/AFeaturesLFE Input YES functional BW Limited to 500 HzVolume pot Taper (lin/log) log -- functionalATO YES functionalInput ConfigurationLine In (L,R) L ,R -- functional RCA inputs: L , R Summed to MonoLine level in LFE LFE functionalSpkr/Hi Level In (L,R) L,R -- functional L R Summed to MonoSpkr Out: Level out (L,R)Hi P L,R functional Direct by pass from Speaker inSignal Sensing (ATO)ATO test Frequency 50 Hz functionalATO Line Level 2 mV functional2mV@50Hz into Line Input w/ 1 ch.drivenATO Speaker level input 50 mV fucntional50mV@50Hz into Line Input w/ 1 ch.drivenATO Turn-on time 5 ms functionalAmp connected and AC on, then inputsignal appliedAuto Mute/ Turn-OFF Time 15 minutes functionalT before muting, after signal isremoved Auto turn of time (T) must be 10 > T <15SUB500 (SCS500.5 Subwoofer)2