JBL service manual S120PII Studio Series

S120PII Studio Series

S120PII 300W 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	Spec	Unit	Limits	Conditions	Notes
Amp Section
					Bridge type amplifier, None of the speaker
					terminals must be connected to system GND at
Type (Class AB, D, other)	D	n/a	n/a		any time.
Load Impedance (speaker)	6	Ohms	n/a	Nominal
					Limiter prevents continuous power to exceed
Rated Output Power	275	Watts	220	1 input driven	220 Watts.
THD @ Rated Power	0.1	%	1	22k filter
THD @ 1 Watt	0.1	%	0.5	22k filter
DC Offset	10	mV-DC	60	@ Speaker Outputs
					Measured at the speaker cable. 200 Watts,
					measured at speaker output terminals located at
Damping factor	>50	DF	23	Measured at amplifier board	the amp board.
Input Sensitivity
Input Frequency	50	Hz	50	Nominal Freq.
L&R	425	mVrms	±2dB	To 200 Watts	Single input driven
LFE Mode selected	425	mVrms	±2dB	To 200 Watts	LFE Mode selected, single input driven
Bass Q Input	0.9	Vrms	±2dB	To 200 Watts	Single input driven
Speaker/Hi Level Input	5.5	Vrms	±2dB	To 200 Watts	Single input driven
Signal to Noise
SNR-A-Weighted	100	dBA	85	relative to rated power	A-Weighting filter
SNR-unweighted	90	dBr	85	relative to rated power	22k filter
SNR rel. 1W-unweighted	65	dBr	60	relative to 1W Output	22k filter
				Volume @max, using RMS reading
Residual Noise Floor	1	mVrms	2	DMM/VOM (or A/P)
				Volume @max, w/ A/P Swept
				Bandpass Measurement (Line
Residual Noise Floor	1	mVrms(max)	2	freq.+ harmonics)
Input Impedance
Line Input (L, R,LFE)	10K	ohms	n/a	Nominal
Speaker/Hi Level Input	10K	ohms	n/a	Nominal
Filters
LP 4th order fixed	50-150	Hz	± 10		2nd order variable and 2nd order fixed
Subsonic filter (HPF) 3rd Order	Fixed
LFE Low pass 2nd order	Fixed	Hz	± 10	LFE input driven only
Limiter
THD at Max. Output Power	YES	n/a	functional	Maximum Output Power
Features	--
Auto - On -Off switch	YES	--	functional		Refer to ATO section
Phase switch	0-180	deg	functional
Volume pot Taper (lin/log)	LOG	--	functional		A Taper
Variable crossover 50-150 Hz	YES		functional
					HP single order filter 180 Hz @ 8 Ohms, 90 Hz
HP Speaker out			functional		@ 4 Ohms load
LFE -Normal Select switch	YES	--	functional		Disables LP filter, intended for LFE
BassQ Input	YES		functional		6.3mm Phono Jack
BassQ Output	YES		functional		Bypass, loop-through - Designed for daisy chain
Input Configuration
Line In (L,R) & LFE	YES	--	functional		Dual RCA jack
Bass Q in	YES		functional		6.3m phono mono Jack
Spkr/Hi Level In	YES	--	functional		Binding post connector L&R
Signal Sensing (ATO)
Auto-Turn-On (yes/no)	YES		functional	Auto - on selection switch in Auto
ATO Input test frequency	50	Hz	functional	"
ATO Level LFE Input	2	mV	functional	"
ATO Level Speaker in	50	mV	functional	"
ATO Level Bass Q input	2	mV	functional	"
				Amp connected and AC on, then
ATO Turn-on time	1	seconds	functional	input signal applied
				T before muting, after signal is	Auto turn of time (T) must be 10 > T < 17
Auto Mute/ Turn-OFF Time	15	minutes	17	removed	Minutes
Power on Delay time	3	sec.	4	AC Power Applied

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