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Performance Series

   Powered Subwoofer

PRELIMINARY

SERVICE MANUAL

JBL Consumer Products

250 Crossways Park Dr.

Woodbury, New York   11797

BASIC SPECIFICATIONS . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . .. .. . . . . . . .. .. . . . . . . . 2

Amplifier Power Output

400 Watts

Sensitivity (2.83V/1m)

91dB

Frequency Response (–6dB)

28Hz to 130Hz

   (-3dB)

30Hz to 130Hz

Crossover Frequency

130Hz

Low-Frequency Transducer

LE14H-3    14" Aquaplas™-cone woofer

Dimensions (H x W x D)

19" x 20" x 15"  (483mm x 508mm x 381mm)

Plus grille and spike feet

Weight

80 lb (36kg)

JBL continually strives to update and improve existing products, as well as create new ones. The specifications and details in
this and related JBL publications are therefore subject to change without notice.

2

US 120vac/60Hz

Yes

108-132

120

Vrms

Normal Operation

EU 230vac/50-60Hz

Yes

207-264

230

Vrms

Normal operation, MOMS required

Type (Class AB, D, other)

D

n/a

D

Bridge amplifier, None of the speaker outputs 
must be connected to GND at any time.

Load Impedance (speaker)

6

Ohms

6

Rated Output Power  (120VAC)

250

Watts

240

Nominal Input voltage , unit without limiter must 
be able to provide output power levels in the 
range of 350 Watts

THD @ Rated Power

0.3

%

1

THD @ 1 Watt

0.1

%

0.3

DC Offset

100

mV-DC

100

Damping factor

>40

DF

23

200 Watts into 6 Ohms, measured at speaker 
out

Input Sensitivity
Input Frequency

60

Hz

LFE input

1.50

Vrms

±2dB

250 Watts into rated impedance load Normal Mode

SYSTEM INPUT

1.10

Vrms

±2dB

1 Watt output  , LF level control FCW Normal Mode

SYSTEM INPUT

3.47

Vrms

±2dB

1 Watt output  , LF level control FCCWNormal Mode

Signal to Noise
SNR-No Filter

86

dBr

70

relative to rated power

No filter 500 KHz BW AP

SNR-A-Weighted

95

dBA

80

relative to rated power

A-Weighting filter

SNR-unweighted

95

dBr

80

relative to rated power

22k filter

SNR rel. 1W-unweighted

70

dBr

60

relative to 1W Output

22k filter

Residual Noise Floor

1

mVrms

2

Volume @max, using RMS reading 
DMM/VOM (or A/P) BW=20 Khz.

Residual Noise Floor

1.5 mVrms(max)

2

Volume @max, w/ A/P Swept 
Bandpass Measurement (Line freq.+ 
harmonics) (BW=20 Khz)

Low Level input(LFE)

20K

Ohms

n/a

Nominal

Speaker/Hi Level Input

10K

Ohms

n/a

Nominal

Filters
Normal Mode LP 3rd Order        
-3dB Point

Fixed-selectable

Hz

100 ± 2

Front panel switch to Normal mode 
Reference level 0dB @ 60 Hz 
Normal mode

Separated mode LP 3rd 
Order   -3db Point

Fixed-selectable

Hz

280 ± 2

Front panel switch to Separated 
Reference level 0dB @ 60 Hz,  when 
EQ switch in Normal mode

Subsonic Filter -3dB point

Fixed

Hz

20.5 ± 2

Ref level 0dB ref at 60 Hz Normal 
mode

Limiter 
THD at Max. Output Power

n/a

n/a

functional  Maximum Output Power

Maximum THD as a result of limiting. Must be 
lower than 10%

Signal Sensing (ATO)
Auto-Turn-On (yes/no)

YES

functional 

ATO Input test frequency

60

Hz

functional 

"

ATO Level LFE Input

6

mV

functional 

"

Maximum acceptable level.

ATO Level Speaker in

184

mV

functional 

"

Maximum acceptable level.

ATO Turn-on time

1

sec.

functional  Amp connected and AC on, then 

input signal applied

Auto Mute/ Turn-OFF Time

15

Minutes

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

5

mV-peak

n/a

@ Speaker Outputs

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

70

%

65

Nominal Line voltage 120 VAC

15

Watts

18

@ nom. line voltage

Power Cons. @ rated power

425

Watts

462

@ nom. line voltage

300 Watts @ 6 Ohms nominal line voltage

Protection
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

DC Offset Protection

YES

-

DC present at Speaker Out leads

Line Fuse Rating
USA-Domestic  

4

Amps

Type-T or Slo Blo-250 V

EU

2

Amps

Type-T or Slo Blo-250 V

External fuse with UL/SEMKO rated holder

3

¡

¡ On/Auto Switch – When
left in the “Auto” position, the
PS1400 subwoofer will
automatically turn on or go into
standby mode, depending on
whether it detects an audio
signal. When no signal is being
sent, the PS1400 will remain in
standby mode. When it senses
an audio signal, it will
automatically turn itself on and
begin playing. If the PS1400
does not sense a signal for
about twenty minutes, it will
switch itself into standby
mode. When this switch is 
left in the “On” position, the
PS1400 will remain on, whether
or not program material is
playing.

™

™ LF Crossover Switch – This
switch is used to engage the
PS1400’s internal crossover
when it is stacked with the
PT800 tower module, and when
no external crossover is being
used. In the “Normal” position,
the internal crossover is
engaged, and provides an
electronic 130Hz crossover for
the subwoofer which precisely
matches the passive 130Hz
crossover point of the output
terminal to the PT800. The
crossover is precision-
designed to create a smooth,
integrated floorstanding
speaker system when the
PS1400 and PT800 are stacked.

In the “Separated” position,
the PS1400 provides an
electronic 300Hz rolloff for the
subwoofer, which should be
augmented by the low-pass
crossover in the external
audio/video receiver or
processor. In this mode, the
PT800, whether or not it is

stacked with the PS1400,
should be given only a high-
passed amplifier signal. That
signal should be crossed over
at 80Hz.

£

£ LF Level Control – This
control allows you to adjust the
level of the subwoofer within a
range of +/– 5dB. Start with the
control positioned at 0dB,
which is flat (neutral bass
level). If bass response is
unsatisfactory, due to either
your room acoustics or as a
matter of taste, experiment
with this control until the
desired bass level is achieved. 
This control only affects all
information being received by
the speaker-level input.

¢

¢ Polarity (Phase) Switch –
Use the “Normal” position
whenever the PS1400 and PT800
are stacked and the internal
crossover is used. It should
also be used when an external
crossover is used and all
amplifier channels are in phase.

The “Reverse” position may be
used when the PS1400 and
PT800 are separated, and due
to wave cancellation, bass
response is improved in this
position. “Reverse” may also
be selected when different
amplifiers are used that 
have different polarity
configurations.

®

¡

™

£

¢

∞

§

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