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Parameter

Specification

Unit

QA Test 

Limits

Conditions

Notes

Turn-on Transient

50

mV-peak

2v-pp

@ Speaker Outputs

AC Line cycled from OFF to ON

Turn-off Transient

50

mV-peak

2v-pp

@ Speaker Outputs

AC Line cycled from ON to OFF

Efficiency

Efficiency

65

%

64

Nominal Line voltage 120 VAC

Stand-by Input Power

24

Watts

26

@ nom. line voltage

Maximum allowable  input power under nominal  
Input voltage and frequency, HOT or COLD 
operation.

Power Cons. @ rated power

234

Watts

240

@ nom. line voltage

150 Watts @ 5.6 Ohms nominal line voltage

Protections

Short Circuit Protection 

YES

functional  Direct short at output

Amplifier should resume operation after short 
circuit condition removal 

Thermal Protection 

YES

functional

@1/8 max unclipped Power at 1.06 
times the input voltage

Temperature rise in accessible metal parts 
should not exceed 35K rise for domestic version 
or 30K rise for European versions (refer to 
requirements sheet).

DC Offset Protection

YES

-

DC present at Speaker Out leads

Design must insure no Offset at the speaker 
output  under any operating condition including 
abnormal operation

Line Fuse Rating

USA-Domestic 2

Amps

2

Type-T or Slo Blo-250 V

Internal fuse with UL/SEMKO rated holder

EU

1.25

Amps

1.25

Type-T or Slo Blo-250 V, Low 
Breaking capacity

Internal fuse with UL/SEMKO rated holder

4. ALL SPECS SHOULD BE MEASURED AT NOMINAL LINE VOLTAGE. 

SPEAKER CONNECTION

When we designed the 
E150P and E250P powered
subwoofers, our goal was 
to offer the user the best pos-
sible performance combined
with the most flexible and
complete installation options.
Please look over the following
three examples to determine
which description best
matches your system and 
follow the corresponding
hookup instructions.

To use the binding-post
speaker terminals with bare
wire, unscrew the collar until
the hole through the center
post is visible under the collar.
Insert the bare end of the wire

through the hole in the post,
then screw the collar back
down until the connection is
tight. The holes in the center
of the collars are intended for
banana-type connectors.

Speakers and electronics termi-
nals have corresponding positive
(+) and negative (–) terminals. It
is important to connect both
speakers identically: 
positive (+) on the speaker 
to positive (+) on the amplifier
and negative (–) on the speaker
to negative (–) on the amplifier.
Wiring “out of phase” results in
thin sound, weak bass and a
poor stereo image. 

NOTE:

The speaker-level con-

nection method described on

the next page is not a
preferred connection

 

 and should only be
resorted to if your receiver/
processor does not have a 
line-level or subwoofer output.
The customer is responsible for
proper connections, and any
damage to JBL or other equip-
ment due to improper connec-
tions will not be covered by
your JBL warranty. Consult with
your JBL dealer or an audio-
installation expert if you have
any questions about how to
connect your subwoofer using
the speaker-level inputs.

3

Содержание E250P

Страница 1: ...Northridge E Series E250P Powered Subwoofer Preliminary Service Manual JBL Consumer Products 250 Crossways Park Dr Woodbury New York 11797...

Страница 2: ...5 way binding posts Low Pass Frequency Variable from 50Hz to 150Hz Frequency Response 25Hz Low pass crossover setting Dimensions H x W x D 19 3 4 x 14 3 8 x 16 1 2 502mm x 365mm x 419mm Weight 43 lb 1...

Страница 3: ...M Residual Noise Floor 1 5 mVrms max 2 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...

Страница 4: ...KER CONNECTION When we designed the E150P and E250P powered subwoofers our goal was to offer the user the best pos sible performance combined with the most flexible and complete installation options P...

Страница 5: ...the front left and right speakers or the subwoofer Refer to the connection dia gram for guidance Twist together the leads at one end of the speaker wires that you have designated for the left front s...

Страница 6: ...IVER PREAMPLIFIER L R For LFE use L or R Analog Receiver Processor Line Level Connections Use this installation method with an analog receiver processor that does not have digital processing or bass m...

Страница 7: ...roper level adjustment depends on sev eral variables such as room size subwoofer placement type of main speakers and position Adjust the subwoofer level so that the volume of the bass information is p...

Страница 8: ...uts and there is no sound from the subwoofer Check that the receiver amplifier is on and a source is playing Check that the powered subwoofer is plugged into an active electrical outlet and is switche...

Страница 9: ...rands International Rectifier or Fairchild Replace both Q18 and Q22 MOSFET s in the circuit even if only one seems to be damaged Do NOT mix match these components from different manufacturers or batch...

Страница 10: ...4 11 903802 016 SCREW PB HXS 8x1 ZINC WOOFER 8 12 338128 002 ASY WOOFER 12 DCR 4 8 1 13 336799 001 ASY PORT TUBE 1 14 352024 001 ASY GRILLE BLK FRNT 1 15 333249 003 CUP GRILLE TITANIUM BEECH MODEL CHE...

Страница 11: ...10...

Страница 12: ...11...

Страница 13: ...12...

Страница 14: ...13...

Страница 15: ...14...

Страница 16: ...4 187698 100 SMD Resistor 187K 1 8W F 0805 R45 024 200598 120 SMD Resistor 20K 1 8W J 0805 R94 024 220398 120 SMD Resistor 220R 1 8W J 0805 R90 024 220498 121 SMD Resistor 2K2 1 8W J 0805 R1 87 61 024...

Страница 17: ...acitor 56pF 50V J 0805 NPO C57 61 031 560343 102 SMD Capacitor 560pF 50V J 0805 NPO C56 032 100484 200 Mylar Capacitor 1uF 250V K P 15 C70 C70B 033 470444 270 NPE Capacitor 4u7 50V K10 R 8x13 SBE C73...

Страница 18: ...shay D1 4 8 10 23 27 28 054 540100 100 SMD Zener Diode PN MMBT5401 LT1 SOT 23 Q20 24 26 054 555100 100 SMD Zener Diode PN MMBT5551 LT1 Q25 050 505200 001 LED PN LT 2402 21 D1B Miscellaneous 065 050400...

Страница 19: ...inal T187MA t 0 8mm PC187 0 8 AC1 AC3 T1 T2 AC2 SW2 SW4 072 040169 000 Connector 2 PIN JS 1001 2 P 2 5mm 072 060170 000 B P W Accessory Parts 073 032315 601 Black Anodized 70x58x20mm 073 050001 000 Fu...

Страница 20: ...2N5401 Q1 2 Base 3 Collector 1 Emitter 1 2 3 MPSW06RLRA MPSW56RLRAMPQ MPS2222ARLRA 2N2907A 2N5551 Q2 16 3 21 19 23 17 MOSFET IRF640 Q18 22 TIP31C Q4 MMBT3904LTI SOT23 MMBT3906LTI SOT23 DTC114EK SMT3 M...

Страница 21: ......

Страница 22: ......

Страница 23: ...P E250P 1 2 351249 001 CARTON MASTER E250P BEECH MODEL 1 351249 003 CARTON MASTER E250P BLACK MODEL 1 350884 003 CARTON MASTER E250P CHERRY MODEL 1 3 351252 001 PAD END TOP E250P 1 4 351252 002 PAD EN...

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