JBL SUB500, Service Manual

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JBL SUB 500 150W Powered Sub/ Plate Amp
LINE VOLTAGE Yes/No Hi/Lo Line Unit Notes
US 120VAC/60Hz Yes 108-132 Vrms
Normal Operation
Asia 100VAC/50Hz Yes 90-110 Vrms Normal Operation
EU 230VAC/50-60Hz Yes 207-264 Vrms Normal Operation Normal operation, MOMS required
Parameter Specification Unit
QA Test
Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D D N/A
Load Impedance (speaker) 4 Ohms N/A Nominal
Rated Output Power 150 Watts 140 1 input driven
THD@ Rated Power 0.5 % 1 22KHz filter
THD @ 1 Watt 0.1 % 0.3 22KHz filter
DC Offset 10 mV-DC 50 @ Speaker Outputs
Damping factor >100 DF 30
Measured at speaker terminals, Output
power 140 Watts THD 0.1 %
Input Sensitivity
Input Frequency 50 Hz 50 Nominal Freq. 1 input driven
Line Input (L&R) 250 mVrms ±2dB To rated power 1 input driven
LFE Input 145 mVrms ±2dB To rated power LFE input driven only
Speaker/Hi Level Input 2.5 Vrms
±2dB To rated power (-20 dB below Line In)...1 input driven
Signal to Noise
SNR-A-Weighted 100 dBA 85 rel. to rated power A-Weighting filter
SNR-unweighted 90 dBr
80 rel. to rated power 22KHz filter
SNR @ 1W-unweighted 60 dBr 55 rel. to 1W Output 22KHz filter
Residual Noise Floor 1 mVrms 2
Volume @max, using RMS reading
DMM/VOM (or A/P)
Residual Noise Floor 1
mVrms(max)
2
Volume @max, w/ A/P Swept
Bandpass Measurement (Line freq.+
harmonics)
Input Impedance
Line input L&R , LFE >10 K ohms
N/A Nominal
Speaker/Hi Level Input 4.7 K ohms N/A Nominal
Filters
Left & Right Low Pass fixed Hz -- ±2dB
Slope & Q 4th dB/Octave
N/A
LFE Low Pass fixed Hz -- ±2dB
Slope & Q 2nd dB/Octave N/A
Subsonic filter (HPF) Hz -- ±2dB
Slope & Q 2nd dB/Octave
N/A
Limiter (yes/no) YES -- N/A
THD at Max. Output Power N/A -- N/A
Features
LFE Input YES functional BW Limited to 500 Hz
Volume pot Taper (lin/log) log -- functional
ATO YES functional
Input Configuration
Line In (L,R) L ,R -- functional RCA inputs: L , R Summed to Mono
Line level in LFE LFE functional
Spkr/Hi Level In
(L,R)
L,R -- functional L R Summed to Mono
Spkr Out: Level out (L,R)Hi P L,R
functional Direct by pass from Speaker in
Signal Sensing (ATO)
ATO test Frequency 50 Hz functional
ATO Line Level 2 mV functional
2mV@50Hz into Line Input w/ 1 ch.
driven
ATO Speaker level input 50 mV
fucntional
50mV@50Hz into Line Input w/ 1 ch.
driven
ATO Turn-on time 5 ms functional
Amp connected and AC on, then input
signal applied
Auto Mute/ Turn-OFF Time 15 minutes functional
T before muting, after signal is
removed
Auto turn of time (T) must be 10 > T <15
SUB500 (SCS500.5 Subwoofer)
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