JBL service manual E250P/P12SW subwoofers, JBL E250P/P12SW Powered Sub/ Plate Amp

E250P/P12SW subwoofers

JBL E250P/P12SW Powered Sub/ Plate 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	207-264	230	Vrms	Normal operation, MOMS required
			QA Test
Parameter	Specification	Unit	Limits	Conditions		Notes
Amp Section
Type (Class AB, D, other)	D	n/a	n/a
Load Impedance (speaker)	5.6	Ohms	n/a	Nominal
Rated Output Power (120VAC	150	Watts	140		Domestic version only 120 VAC-60 Hz
Rated Output Power (230VAC	150	Watts	130		EU Version only	230 VAC-50 Hz
					Average RMS power, 3/20 Cycles 50 Hz, Driven
AVG RMS Dynamic Power	250	Watts	225		6dB above its input sensitivity sensitivity
THD @ Rated Power	0.3	%	1	22k filter	145 Watts
THD @ 1 Watt	0.1	%	0.5	22k filter
DC Offset	10	mV-DC	30	@ Speaker Outputs
					Measured at the speaker cable. 150 Watts @
Damping factor	>50	DF	35	Measured at amplifier board	THD < 0.1 % @ 50 Hz
Input Sensitivity
Input Frequency	50	Hz	50	Nominal Freq.
L&R	240	mVrms	±2dB	To 150 Watts	Single input driven
LFE input	240	mVrms	±2dB	To 150 Watts	Single input driven, LFE switch ON
Speaker/Hi Level Input	2.4	Vrms	±2dB	To 150 Watts	Single input driven
Signal to Noise
SNR-A-Weighted	90	dBA	70	relative to rated power	A-Weighting filter
SNR-unweighted	85	dBr	70	relative to rated power	22k filter
SNR rel. 1W-unweighted	65	dBr	60	relative to 1W Output	22k filter
				Volume @max, using RMS reading	Line level inputs must be terminated using
Residual Noise Floor	1	mVrms	2	DMM/VOM (or A/P) BW=20 Khz.	1KOHM
				Volume @max, w/ A/P Swept
			2	Bandpass Measurement (Line	Line level inputs must be terminated using
Residual Noise Floor	1.5	mVrms(max)		freq.+ harmonics) (BW=20 Khz)	1KOHM
Input Impedance
Line Input (L, R,LFE)	10K	ohms	n/a	Nominal
Speaker/Hi Level Input	> 4.7K	ohms	n/a	Nominal
Filters
LP filter 4th order fixed	60-180	Hz	± 10		2nd order variable + 2nd order fix-24 db/Octave
Subsonic filter (HPF) 3rd Orde	Fixed
LFE Low pass 2nd order	200>LP<1K	Hz		LFE input driven only
				Speaker input driven - Speaker out
HP speaker out connector	200	Hz	± 10	loaded with 4 Ohms	(Applies only to 230V Model)
Note: 120V Models do not				Speaker input driven - Speaker out
have speaker output	100	Hz	± 10	loaded with 8 Ohms	(Applies only to 230V Model)
Limiter
THD at Max. Output Power	n/a	n/a	functional	Maximum Output Power	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
Spkr/Hi Level In	YES	--	functional		Binding post connector L&R
Signal Sensing (ATO)
Auto-Turn-On (yes/no)	YES		functional
ATO Input test frequency	50	Hz	functional	"
ATO Level LFE Input	4	mV	functional	"	Maximum acceptable level.
ATO Level Speaker in	50	mV	functional	"	Maximum acceptable level.
				Amp connected and AC on, then
ATO Turn-on time	5	ms	functional	input signal applied
				T before muting, after signal is	Auto turn of time (T)	must be 5 > T < 15
Auto Mute/ Turn-OFF Time	15	minutes	15	removed	Minutes
Power on Delay time	3	sec.	4	AC Power Applied
Transients/Pops
ATO Transient	5	mV-peak	n/a	@ Speaker Outputs

5