Amplifier Specifications - JBL STUDIO Series Service Manual

PRODUCT: JBL S412P
LINE VOLTAGE
US 120vac/60Hz
EU 230vac/50-60Hz
Parameter Specification
Amp Section
Type (Class AB, D, other)
Load Impedance (speaker)
Rated Output Power
THD @ Rated Power
THD @ 1 Watt
DC Offset
Damping factor
Input Sensitivity
Input Frequency
LFE input
Speaker/Hi Level Input
Signal to Noise
SNR-A-Weighted
SNR-unweighted
SNR rel. 1W-unweighted
Residual Noise Floor
Residual Noise Floor
Input Impedance
Line Input
Speaker/Hi Level Input
Filters
Speaker in LP 2nd order fixed
Subsonic filter (HPF)
LFE Low pass 2nd order
Limiter
THD at Max. Output Power
Features
Auto - On selection switch
LED On-Off switch
Volume pot Taper (lin/log)
Input Configuration
Line In LFE
Spkr/Hi Level In
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
ATO Input test frequency
ATO Level LFE Input
ATO Level Speaker in
ATO Turn-on time
Auto Mute/ Turn-OFF Time
S412P AMPLIFIER SPECIFICATIONS
Yes/No Hi/Lo Line Nom.
Yes 108-132 120
Yes 207-264 230
QA Test
Unit Limits
G n/a n/a
4 Ohms n/a
150 Watts 130
0.1 % 1
0.3 % 0.5
20
10 mV-DC
>150 DF 100
>75 50
30 Hz 30
1.05 Vrms ±2dB
±2dB
23.66 Vrms
100 dBA 90
70
70 dBr
65 dBr 60
1 mVrms 5
1.5 mVrms(max) 4
20k ohms n/a
10k ohms n/a
Fixed
Fixed
n/a n/a functional Maximum Output Power
--
YES -- functional
YES -- functional
functional
LOG --
YES -- functional
functional
YES --
YES functional Auto - on selection switch in Auto
functional
30 Hz
4 mV functional
100 mV functional
5 ms functional
15 minutes 17
Unit
Vrms
Vrms
Conditions
Nominal
1 input driven
22k filter
22k filter
@ Speaker Outputs
Measured at amplifier board
Measured at speaker cable
Nominal Freq.
To 140 Watts
To 140 Watts
relative to rated power
relative to rated power
relative to 1W Output
Volume @max, using RMS reading
DMM/VOM (or A/P)
Volume @max, w/ A/P Swept
Bandpass Measurement (Line
freq.+ harmonics)
Nominal
Nominal
LFE input driven only
"
"
"
Amp connected and AC on, then
input signal applied
T before muting, after signal is
removed
Notes
Normal Operation
Normal operation, MOMS required
Notes
Class D Preferred...Sink required for Class AB
Z-curve required
Measured at the speaker connector. 130 Watts
@ THD < 0.08 % @ 50 Hz
A-Weighting filter
22k filter
22k filter
See AP curves
See AP curves
See AP curves
Maximum THD as a result of limiting.
Refer to ATO section
Dual LED indicator
A Taper
Single RCA jack
Maximum
3