Read JBL ES250PW (serv.man2) Service Manual online
ES250PW
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 required
Parameter
Specification
Unit
QA Test
Limits
Conditions
Notes
Amp Section
Type (Class AB, D, other)
Type (Class AB, D, other)
D
n/a
n/a
Load Impedance (speaker)
4
Ohms
n/a
Nominal
AVG System impedance
7.25
Ohms
n/a
AP Computed BW 20 to 500Hz
Min System impedance
4.385
Ohms
n/a
@ 92Hz
Rated Output Power (120VAC)
250
Watts
240
Domestic version only 120 VAC-60 Hz
AVG RMS Dynamic Power
336
Watts
Reference 200mV driven into LFE input
Average RMS power, 3/20 Cycles 50 Hz,
Driven 6dB above its input sensitivity ,
average of the RMS value for the first 4
consecutive peaks
THD @ Rated Power
0.5
%
1
22K filter
THD @ 1 Watt
0.2
%
0.3
22K filter
DC Offset
10
mV-DC
30
@ Speaker Outputs
Damping factor
>50
DF
20
Measured at amplifier board 90%
of full power
Measured at the speaker cable. 225 Watts @
THD < 0.1 % @ 50 Hz
Input Sensitivity
Input Frequency
Input Frequency
50
Hz
50
Nominal Freq.
L or R
13
mVrms
±1dB
To 1 Watt, AP Zo=600
Single input driven, either L or R
LFE input
7
mVrms
±1dB
To 1 Watt, AP Zo=600
LFE input driven only.
System Gain (L or R inputs)
43.7
dB
Reference
Single input driven L or R inputs (Local inputs)
System Gain (LFE input)
49.1
dB
Reference
Single input driven LFE, local input
Signal to Noise
SNR-A-Weighted
SNR-A-Weighted
80
dBA
75
relative to 1W
A-Weighting filter
SNR-unweighted
65
dBr
60
relative to 1W
22K filter
Residual Noise Floor
<1.5
mVrms(max)
2.5
Volume @max, w/ A/P Swept
Bandpass Measurement (Line
freq.+ harmonics) (BW=20 KHz)
Line level inputs must be terminated using
1KOHM
Input Impedance
Line Input (L, R,LFE)
Line Input (L, R,LFE)
10K
ohms
n/a
Nominal
Filters
LP filter Variable (Normal mode)
LP filter Variable (Normal mode)
50-150
Hz
± 10
4th Order variable-24 db/Octave
Subsonic filter (HPF) 2nd Order
Fixed
Friend circuit
Fixed
LFE Low pass
200>LP<500
Hz
LFE input driven only
Limiter
THD at Max. Output Power
5
%
functional
Drive unit 6dB above the required
level to obtain full power
Approximately 800mV single input
driven, L or R input
Maximum THD as a result of limiting.
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, Wireless mode only, it has
no effect when using local inputs
Wireless ready
YES
functional
Refer to Wireless section below
Wireless channels
4
n/a
functional
System is provided with 4 wireless channels,
which can be selected via a rear panel switch,
channel should match ID at Tx side
LED Indicator
YES
functional
RED-Standby, GRN-Active, ORG-Wireless
link and subwoofer are active.
Input Configuration
Line in (L,R) & LFE
YES
--
functional
3 RCA Jacks, RED, WHT (Left and Right) and
Purple for LFE
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
Auto-Turn-On (yes/no)
YES
functional
ATO Input test frequency
50
Hz
functional
ATO Line level input
1.5
mV
functional
Maximum acceptable level.
ES250PW
2
Click on the first or last page to see other ES250PW (serv.man2) service manuals if exist.