S412P_STUDIO_SERIES_sm.pdf

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439739300 UNPDF
STUDIO SERIES
S412P
4 - way POWERED SPEAKER SYSTEM
SERVICE MANUAL
JBL Consumer Products
250 Crossways Park Dr.
Woodbury, New York 11797
Rev 0 – 2/2000
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- CONTENTS -
S412P
GENERAL ACOUSTIC & ELECTRICAL SPECIFICATIONS
Nominal Impedance
8 ohms
Max Amp Power
250 watts*
Frequency Response
32Hz – 20kHz
Sensitivity
91 dB (1 watt @ 1 meter)
Crossover Frequency
200Hz, 850Hz, 3500Hz
Subwoofer Amplifier Output 200 watts
AURAL SWEEP TEST SPECIFICATIONS:
A. System Aural Sweep Test
6.0V Input 20 Hz to 20 kHz
B. L.F. Aural Sweep Test
6.0V Input 20 Hz to 500 Hz
C. M.B.F. Aural Sweep Test
5.0V Input 100 Hz to 1 kHz
D. M.F. Aural Sweep Test
4.0V Input 500 Hz to 4 kHz
E. H.F. Aural Sweep Test
2.83V Input 3 kHz to 20 kHz
PHYSICAL SPECIFICATIONS
Enclosure dimensions :
44 x 16 x 13 3/8” (H x W x D)
1118 x 406 x 340mm
Weight
86lbs./39.1kg Each
*The maximum recommended amplifier power rating will ensure proper system headroom to
allow for occasional peaks. We do not recommend sustained operation at these maximum
power levels.
Occasional refinements may be made to existing products without notice but will always meet
or exceed original specifications, unless otherwise stated.
2
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PRODUCT: JBL S412P
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
Parameter
Specification
Unit
QA Test
Limits
Conditions
Notes
Amp Section
Type (Class AB, D, other)
G
n/a
n/a
Class D Preferred...Sink required for Class AB
Load Impedance (speaker)
4
Ohms
n/a
Nominal
Z-curve required
Rated Output Power
150 Watts
130
1 input driven
THD @ Rated Power
0.1
%
1
22k filter
THD @ 1 Watt
0.3
%
0.5
22k filter
DC Offset
10 mV-DC
20
@ Speaker Outputs
Measured at the speaker connector. 130 Watts
@ THD < 0.08 % @ 50 Hz
Damping factor
>150
DF
100
Measured at amplifier board
>75
50
Measured at speaker cable
Input Sensitivity
Input Frequency
30
Hz
30
Nominal Freq.
LFE input
1.05
Vrms
±2dB
To 140 Watts
Speaker/Hi Level Input
23.66
Vrms
±2dB
To 140 Watts
Signal to Noise
SNR-A-Weighted
100
dBA
90
relative to rated power
A-Weighting filter
SNR-unweighted
70
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
DMM/VOM (or A/P)
Residual Noise Floor
1 mVrms
5
Volume @max, w/ A/P Swept
Bandpass Measurement (Line
freq.+ harmonics)
Residual Noise Floor
1.5 mVrms(max)
4
Input Impedance
Line Input
20k
ohms
n/a
Nominal
Speaker/Hi Level Input
10k
ohms
n/a
Nominal
Filters
Speaker in LP 2nd order fixed
Fixed
See AP curves
Subsonic filter (HPF)
See AP curves
LFE Low pass 2nd order
Fixed
LFE input driven only
See AP curves
Limiter
THD at Max. Output Power
n/a
n/a
functional Maximum Output Power
Maximum THD as a result of limiting.
Features
--
Auto - On selection switch
YES
--
functional
Refer to ATO section
LED On-Off switch
YES
--
functional
Dual LED indicator
Volume pot Taper (lin/log)
LOG
--
functional
A Taper
Input Configuration
Line In LFE
YES
--
functional
Single RCA jack
Spkr/Hi Level In
YES
--
functional
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
YES
functional Auto - on selection switch in Auto
ATO Input test frequency
30
Hz
functional
"
ATO Level LFE Input
4
mV
functional
"
ATO Level Speaker in
100
mV
functional
"
Amp connected and AC on, then
input signal applied
ATO Turn-on time
5
ms
functional
T before muting, after signal is
removed
Auto Mute/ Turn-OFF Time
15 minutes
17
Maximum
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SPEAKER CONNECTIONS
CONNECTION TIPS
Speakers and electronics
terminals have corre-
sponding (+) and (–)
terminals. It is important to
connect both speakers
identically: (+) on the
speaker to (+) on the
amplifier and (–) on the
speaker to (–) on the
amplifier. Wiring “out of
phase” results in thin
sound, weak bass and a
poor stereo image.
SPEAKER-LEVEL CONNECTIONS
RIGHT
LEFT
– +
– +
– +
– +
Speaker Outputs
Your S412P speakers
should be connected to
your receiver in two ways
(at speaker level and line
level) in order to achieve
the best performance,
especially when listening
to program material
recorded in digital 5.1
formats, such as
Dolby** Digital and DTS. ®
Connect the left-front and
right-front speaker
terminals on your receiver
or amplifier to the 5-way
binding posts on the back
of each S412P speaker.
Remember to maintain the
correct polarities (“+” to
“+” and “–” to “–”). The
S412P uses a red binding
post for “+” and black for
“–”. These connections
will provide full-range
sound to all four
transducers, and you
should ALWAYS make
these connections.
If your receiver or
amplifier does not have a
line-level subwoofer
output, then you do not
need to make any other
connections, and you
should skip to the section
titled “Amplifier Controls.”
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