JBL LS Sub 250W Powered Sub Amp
LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes
US 120vac/60Hz
Yes 108-132 120 Vrms Normal Operation
EU 230vac/50-60Hz
Yes 207-253 230 Vrms Normal operation, MOMS
Parameter Specification Unit QA Test Limits Conditions Notes
Amp Section
Type (Class AB, D, other)
D n/a n/a
Load Impedance (Driver min)
4 Ohms n/a Nominal
System average impedance from
20 to 500 Hz 8.65 Ohms n/a Reference
Driver size 12 inches n/a Reference
Rated Output Power (120VAC)
250 Watts 240 Domestic version only 120
Rated Output Power (230VAC)
269 Watts 250
EU Version only 230
VAC-50-60 Hz
AVG RMS Dynamic Power
210 Watts 270
Average RMS power, 3/20
Cycles 50 Hz, Driven 6dB
above its input sensitivity
sensitivity, average of the first
THD @ Rated Power
0.5 % 1 22k filter
THD @ 1 Watt
0.2 % 0.5 22k filter
DC Offset
50 mV-DC 50 @ Speaker Outputs
Damping factor
>50 DF 20
Measured at
amplifier board
Measured at the speaker
cable. 150 Watts @ THD <
Input Sensitivity
Input Frequency
50 Hz 50 Nominal Freq.
L&R
22 mVrms ±1dB To 1 Watt Single input driven
LFE input
22 mVrms ±1dB To 1 Watt Single input driven, LFE switch
System Gain
90.9 n/a Reference Single input driven Normal
System Gain in dB
39.17 dB Reference Single input driven Normal
Signal to Noise
SNR-A-Weighted
100 dBA 95 relative to rated A-Weighting filter
SNR-unweighted
90 dBr 85 relative to rated 22K filter
SNR rel. 1W-unweighted
65 dBr 60 relative to 1W 22K filter
Residual Noise Floor
1.5 mVrms(max) 2
Volume @max, w/
A/P Swept
Bandpass
Line level inputs must be
terminated using 1KOHM
Input Impedance
Line Input (L, R,LFE)
10K ohms n/a Nominal
Filters
LP filter Variable
50-150 Hz ± 10 4th order variable (24dB/oct)
Subsonic filter (HPF) 2rd Order
Fixed
Friend circuit
Fixed
LFE Low pass
200>LP<500 Hz LFE input driven
Limiter
THD at Max. Output Power
N/A N/A functional Maximum Output Maximum THD as a result of
Features
--
Volume pot Taper (lin/log)
LOG -- functional A Taper
Phase switch
0-180 deg functional
LP Filter defeat switch
YES functional Disables LP filter, intended for
Input Configuration
Line In (L,R)
YES -- functional
LFE use either L or
R inputs, LFE
switch must be
Dual RCA jack
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
YES functional
ATO Input test frequency
50 Hz functional
ATO Level L, R or LFE Mode
1.5 mV functional Maximum acceptable level.
ATO Turn-on time
5 ms functional
Amp connected and
AC on, then input
Auto Mute/ Turn-OFF Time
5-15 minutes 5-15
T before muting,
after signal is
Auto turn of time (T) must be
5 > T < 15 Minutes
LS120P
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