Harman JBL SUB 550P, Service Manual, Page: 3 / 43

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
Asia 100vac/50-60Hz No 90-110 100 Vrms Normal Operation
Parameter Specification Unit
QA Test
Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D n/a
n/a
Load Impedance (speaker) 4 Ohms
n/a
Nominal
AVG System impedance 10.8 Ohms n/a AP Computed BW from 20 to 500Hz Refer to AP Graph
Rated Output Power 250 Watts 220
AVG Peak voltage 45.8 Vpk Reference 170mV driven into a single input
Average PK voltage, 3/20 Cycles 50 Hz, Driven
6dB above its input sensitivity , rated impedance
THD @ Rated Power 0.5 %
1
22K AUX-0025
THD @ 1 Watt 0.2 %
0.3
22K AUX-0025
DC Offset 10 mV-DC 50 @ 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 50 Hz 50 Nominal Freq.
L&R 5.6 mVrms
±1dB
To 1 Watt, Ap Zo=25 Single input driven
LFE input 5.6 mVrms ±1dB To 1 Watt, Ap Zo=25 Single input driven, LFE switch ON
System Gain 51 dB Reference Single input driven Normal or LFE mode
Signal to Noise
SNR-A-Weighted 80 dBA 75 relative to 1W-Inputs terminated A-Weighting filter
SNR-unweighted 70 dBr 65 relative to 1W-Inputs terminated 22K filter
Residual Noise Floor <2.0 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) 5.5K ohms n/a Nominal
Filters
LP filter Variable 50-150 Hz ± 10 4th Order variable Refer to AP curves
Subsonic filter (HPF) 2nd Orde Fixed F=32Hz,Q=0.925 Refer to AP curves
Friend circuit Fixed F=59Hz,Q=3.5, Av=-1dB Refer to AP curves
LFE Low pass Fixed 200>LP-LFE<500 Refer to AP curves
Limiter
THD at Max. Output Power 13 % functional
Drive unit 6dB above the required
level to obtain full power
Approximately 208mV 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, LFE Mode
LED Indicator YES functional
Bi-color LED loacated at the amplifier panel, Red
Standby, Green-On
Input Configuration
Line In (L,R) or LFE
YES -- functional Dual RCA jack, For LFE use L or R
Signal Sensing (ATO)
Auto-Turn-On (yes/no) YES
functional
ATO Input test frequency 50 Hz functional "
ATO Level LFE Input 2 mV functional " Maximum acceptable level.
ATO Turn-on time 5 ms functional
Amp connected and AC on, then
input signal applied
Auto Mute/ Turn-OFF Time 5-15 minutes 5-15
T before muting, after signal is
removed
Auto turn of time (T) must be 5 > T < 15
Minutes
Power on Delay time 3 sec. 4 AC Power Applied
Transients/Pops
ATO Transient 0.5 V-peak 0.5V @ Speaker Output
Amplifier activated by signal presence at the
Line input
Turn-on Transient 0.5 V-peak 0.8V @ Speaker Output AC Line cycled from OFF to ON
Turn-off Transient 0.5 V-peak
0.8V
@ Speaker Output AC Line cycled from ON to OFF
Detailed Specifications
SUB 550P / 230
3