Read JBL SCS 135S Sub (serv.man2) Service Manual online
SUB135S
100W Powered Amplifier
LINE VOLTAGE
Yes/No
Hi/Lo Line
Unit
Notes
EU 230
vac/50Hz Yes 108-132 Vrms Normal Operation
Yes
90-110
Vrms
Normal Operation
Parameter
Specification
Unit
QA Test Limits
Conditions
Notes
Amp Section
Type (Class AB, D, other)
Type (Class AB, D, other)
AB AB
n/a
External Sink required for Class AB
Load Impedance (speaker)
4 Ohms
n/a
Nominal
Z-curve required
Rated Output Power
100 Watts
90
1 input driven
THD@ Rated Power
0.08 %
0.3
22k filter
THD @ 1 Watt
0.1 %
0.5
22k filter
DC Offset
10 mV-DC
20
@ Speaker Outputs
Damping factor
>75 DF
50
Measured at speaker terminals, Output power
90 Watts THD 0.1 %
90 Watts THD 0.1 %
Input Sensitivity
Input Frequency
50 Hz
50
Nominal Freq.
1 input driven
LFE Input
550 mVrms
±2dB
To Rated Power
LFE input
Signal to Noise
SNR-A-Weighted
SNR-A-Weighted
100 dBA
85
rel. to rated power
A-Weighting filter
SNR-unweighted
85 dBr
85
rel. to rated power
22k filter
SNR @ 1W-unweighted
65 dBr
60
rel. to 1W Output
22k filter
Residual Noise Floor
1 mVrms
1.5
Using RMS reading DMM/VOM (or A/P)
LFE Input termintated with 600 Ohms
Residual Noise Floor
1
mVrms(max)
1.5
UsingA/P Swept Bandpass Measurement
(Line freq.+ harmonics)
(Line freq.+ harmonics)
Input Impedance
Line input L&R , LFE
>15 K ohms
n/a
Nominal
Filters
Low Pass (fixed or variable)
Low Pass (fixed or variable)
fixed
--
±2dB
Slope & Q
dB/Octave
n/a
Subsonic filter (HPF)
Hz
±2dB
Slope & Q
dB/Octave
n/a
Limiter (yes/no)
YES
--
n/a
Limiter dirotrytion should not exceed 5%
when input is overloaded by 3 times its input
sensistivity
when input is overloaded by 3 times its input
sensistivity
Features
LFE Input
LFE Input
YES
functional
BW Limited to 500 Hz
ATO
YES
functional
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
Auto-Turn-On (yes/no)
YES
--
functional
ATO Input Frequency
50 Hz
functional
ATO Level
2 mV
functional
2mV@50Hz into Line Input w/ 1 ch. driven
ATO Turn-on time
5 ms
functional
Amp connected and AC on, then input
signal applied
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
Power on Delay time
3 sec.
functional
AC Power Applied
Transients/Pops
ATO Transient
ATO Transient
5 mV-peak
10
@ Speaker Outputs
Turn-on Transient
50 mV-peak
100
@ Speaker Outputs
AC Line cycled from OFF to ON
Turn-off Transient
50 mV-peak
100
@ Speaker Outputs
AC Line cycled from ON to OFF
Efficiency
Stand-by Input Power
13 Watts
15
@ nom. line voltage
Maximum allowable input power under
nominal Input voltage and frequency, HOT or
COLD operation.
nominal Input voltage and frequency, HOT or
COLD operation.
Power Cons.@rated power
185 Watts
195
@ nom. line voltage
100 Watts @ 4 Ohms nominal line voltage
Protection
Short Circuit Protection
Short Circuit Protection
YES
--
functional
Direct short at output
Thermal Protection
65 deg. C
--
functional
@1/8 max unclipped Power
Temperature rise should not exceed 35K rise
DC Offset Protection
YES
--
functional
DC present at Speaker Out leads
Relay or crowbar (for driver/fire protection)
Line Fuse Rating
2.5 Amps
2.5
Type-T or Slo Blo
External fuse with UL/SEMKO rated holder
2
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