JBL ES250P, Руководство по обслуживанию

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JBL ES250P 250W Powered Sub Amp
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) D n/a n/a
Load Impedance (speaker) 4 Ohms n/a Nominal
AVG System impedance 7 Ohms n/a
AP Computed BW from 20 to
500Hz
Rated Output Power (120VAC) 250 Watts 250 Domestic version only 120 VAC-60 Hz
AVG RMS Dynamic Power 509 Watts 200 217mV driven into a single input
Average RMS power, 3/20 Cycles 50 Hz, Driven
6dB above its input sensitivity , average of 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 50 Hz
50 Nominal Freq.
L&R 7 mVrms ±1dB To 1 Watt Single input driven
LFE input 7 mVrms ±1dB To 1 Watt Single input driven, LFE switch ON
System Gain 49 dB Reference Single input driven Normal or LFE mode
Signal to Noise
SNR-A-Weighted 90 dBA 85 relative to 1W A-Weighting filter
SNR-unweighted 80 dBr 75 relative to 1W 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) 10K ohms n/a Nominal
Filters
LP filter Variable 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 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, intended for LFE
Input Configuration
Line In (L,R) & LFE YES -- functional Dual RCA jack
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
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ES250P