Jensen JA Series User manual

JA SERIES
OWNER'S MANUAL
JENSEN ®
The Bluetooth®word markand logos are owned by the Bluetooth® SIG , Inc.
Other tr ademarks and tr ade names are those of their respective owners.
~ Customer Support
1111111:: 1-888-921-4088
--- (Monday-Friday, 9AM-5PM EST)
,__. Visit https://www.jensenmobile.com
....._....
Designed and Engineered in USA
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JA 1B JA2B JA4B
INSTALLATION / OWNER'S MANUAL

JENSEN
JA SERIES
Preparation
Please read entire manual before installation. Due to the technical nature
of amplifiers. it is highly recommended that your amplifier is installed
by a
professional installer
or an authorized dealer.
Before You Start
• Disconnect negative battery terminal. (consult a qualified technician for
instructions)
• Avoid installing the amplifier where it would
be subject to high temperatures. such
as from direct sunlight.
or where it would be subject to dust. dirt or excessive
vibration.
•
Use extreme caution when drilling holes to avoid damaging fuel lines or existing
vehicle wiring.
• All amplifier installations require power. signal and speaker wires (not included).
• An amplifier installation kit (sold separately) is highly recommended to facilitate
the installation. Consult your dealer for recommendations.
Mounting Location
• Choose a mounting location for the amplifier. Suggested locations include under a
seat
or in the trunk.
• The amplifier can be mounted horizontal (recommended) or vertical. For optimum
performance. make sure to provide at least 1" of space around all sides.
Do not
mount the amplifier under carpets
or where airflow is restricted.
•
Do not install the amplifier where it may be exposed to moisture.
•
The optimum mounting location varies between vehicles. Remember to test all
amplifier functions before completing the final mounting procedure.
TYPICAL
MOUNTING
MEJ"HOD
1

JENSEN
JA SERIES
Connection Descriptions
NOTE:
Be sure to follow specific instructions included with your amplifier installation kit
(not included with this amplifier). The information below should be used as a general
guideline only.
Power Wire (+ 12V)
• Disconnect negative battery terminal before proceeding. Consult a qualified
technician
for instructions if you are unsure.
• Plan wire routing before cutting any wires to length. Begin by routing the power
+ 12V wire from the battery to the amplifier location. Use a grommet when running
wires through the firewall
or metal openings. Avoid running the power wire near
existing vehicle wiring to prevent induced noise from entering the audio system.
• Use extreme caution when drilling holes to avoid damaging fuel lines
or existing
vehicle wiring.
•
The + 12V wire MUST be fused within 18" of the battery for protection of the vehicle's
electrical system.
Ground Wire (GND)
• The amplifier ground wire should be as short as possible (no more than 36" or
1 meter). Choose a clean unpainted section of metal or the vehicle chassis when
attaching the ground connection.
Be sure to clean the area of any dirt or grease.
Remote Tum-on Wire (REM)
• The remote turn-on wire connects to the head unit's amplifier turn-on lead or
power antenna output.
Speaker Wires
• Choose adequate gauge speaker wire depending on your exact amplifier/speaker
combination.
Be sure to observe polarity when connecting.
•
Do not ground any speaker wires or connect any speaker wires together.
Input Signal
• The amplifier's input signal connects to the head unit's low level (RCA) or high level
(speaker wire) outputs.
• Low level input signals deliver the best performance. If unavailable. use the high
level inputs -when interfacing with factory head unit
for instance.
Power/ Protect Indicators
• Colored LED indicators illuminate from the plastic power terminal.
• The blue LED illuminates during normal operation (POWER) and the red
LED indicator is visible when the amplifier detects a fault (PROTECT).
CAUTION
• Do not use both low and high level inputs at the same time. Connect only one or the
other.
• Keep low level inputs away from any power wires to avoid engine noise.
• Never run any wires underneath
or outside the vehicle.

JENSEN
JA SERIES
Audio Inputs and Controls
CLASS-D MONO POWER AMPLIF IER
CLASS-D2-CH POWER AMPLIFIER
BRIDGEABLE
CLASS-D4CH POWER AMPLIFIER
BRIDGEABLE
DIGITAL SIGNAL PROCESSOR
II ~~BlOCK
A APP CONTROL
U WIRE SSLINK
DIGITAL SIGNAL PROCESSOR
IIATTENNA
00 NOTBlOCK
DIGITAL SIGNAL PROCESSOR
11 ~:BlOCK
A APP CONTROL
U WIREL 55 UNK
JA18
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JENSEN
JAIB
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JA28
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JENSEN
JAi!B
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JA48
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JENSEN
JA4B
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G) Line Output
® Line Input
® Do not place anything in this area that
could block the radio waves . as this
may be a problem with your Bluetooth
connection .
@ High Level Input
@ Reset

Power and Speaker Connections
JA1B
0 GND REM BATTERY0
O a O
JA2B
<=
REM BATTERY0
JA4B
• GND REM BATTERY.
~-1 IF==========41_______/r=~===Jl1
1
G) Power/Protect LED
® Ground Connection
® Remote Turn On
25A
CLASS-D MONO POWER AMPLIFIER
FUSE O MONO 0 0 MONO 0
25A 25A
FUSE
25A
FUSE
CLASS-D2-CH POWER AMPLIFIER
BRIDGEABLE
s = ;J
0 LEFT 0 0 RIGHT 0
CLASS-D4CH POWER AMPLIFIER
BRIDGEABLE
(;
0,
;J
• LEFT. • RIGHT •
25A
S?.
~~ ~~
CH1
□ □
□ □ CH2
I
~~
~~ ,
CH3
□ □
□ □ CH4 @
@ + 12V DC Battery Connection
® Fuse(s)
@ Speaker Connections

JENSEN
JASERIES
Typical Wire Routing
JA1B
REM
(TURN-ON LEAD)
POWER
18 '
f- (MAXIMUM) -I
F US E D
+1 2V
(BA TT ERY)
RCA CABLES
GND (GRO UN D)
L
REM
( TU RN-ON LEAD)
POWER
18"
f- (MAXIMUM) -I
FUSE
[J
+1 2V
(BATTERY)
Spea ker s, head un i t, wir in g ki t, and speaker wire so ld sepa r ate l y.
Su bwoofer,h ead un it,w iri ng k it, and sp ea ker wi re sold sepa rat ely.
REM
(TURN-ON LEAD)
POWER
18"
f- (MAXIMUM) -I
F USE
D
+1 2V
(B ATTERY)
Spea ker s, su bwoofer, head un i t, wi ri ng kit, and spea kerwi re sold separate l y.

Typical Wire Routing
JA2B
REM
(T URN - ON LE AD)
POWER
18 "
1-(MAXIMUM J-I
FUSE
D
+12V
(BATTERY)
JENSEN
JA SERIES
REM
(TURN-ON LEA D)
POW ER
18 "
f- (MAX IM UM) 7
F USE
D
+1 2V
(BATTERY)
Speakers, head un i t, wir in g ki t, and spea kerwi re so ld sepa r ate l y.
Subwoofe r, head un i t, wir in g ki t, and spea k er wire sold sepa r ate l y.

JENSEN
JA SERIES
Ill
Typical Wire Routing
JA4B
■ M
... NLEAD)
POWER
18 "
1-(MAX IMUMJ-I
FUSE
[J
+1 2V
(BATTERY)
[II
■ M
... NLEAD)
POWER
18 "
1-(MAXIMUMJ-I
FUSE
[J
+12V
(BATTERY)
Speake r s, h ead uni t, w iri ng k it, and speake rwire so ld sepa rately Spea k ers, head uni t, wir in g ki t, and spea k er wire so ld sepa r ate ly
POWER
···-·· -
,s ·
~ (MAXIMUM) -j
■ M
... NL EAD)
FUSE
Spea ker s, head un i t, w ir ing kit, and speake rwi re so ld sepa r ately.
[J
+12V
(BATTERY)

JENSEN
JA SERIES
Amplifier Connections
Speaker Connections
Connect speaker wires
observing polarity. The
minimum impedance load
for the amplifiers is 2 ohms
stereo and 4 ohms bridged.
Use of loads lower than these
is not recommended and may
cause amplifier damage. The
amplifiers can be wired for
stereo, bridged or stereo/
bridged simultaneous
operation.
Input Signal Connections
Low Level Input (RCA)
2 Speakers (stereo) Speaker (bridged)
(SPEAKER OUT)
(SPEAKER OUlJ
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(f)----- BRIDGED MOD6-------B
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Typical Stereo Wiring Typical Bridged Wiring
(2 ohms minimum) (4 ohms minimum)
Typical speaker connections shown
Low level (RCA) input signal is preferred for best performance. Typical trunk-mount
amplifier installations require a 17-20 foot RCA cable. Most trucks and under-seat
applications require a 6-9 foot RCA cable. Using twisted pair construction RCA
cables will minimize noise.
Low-Level Input -
(RCA)
High Level Input
(Speaker Wire)
High level inputs should only be used
when RCA outputs are not available from
the head unit. Connect the head unit
speaker outputs to the high level input
connector as shown below. The black wire
(signal reference ground) may or may not
require a connection to chassis ground -
depending on your particular installation.
TOCHASSJS
GR.OU .
Note: Do not use both low and high level inputs
at the same time -connect only one or the other.

JENSEN
JA SERIES
Controller App Download/Installation
Scan the above QR Code to download the Jensen DSP Amplifier
Controller app from the Apple App Store or Google Play Store onto your
smartphone or tablet.
Use the app to control features including: X-Over. EQ, RGB Light
Customization. Volume and other amp settings directly from your
smartphone or tablet via Bluetooth.
Note:
JA amp series do not support audio streaming and hands free
calls via Bluetooth.

JENSEN
JA SERIES
Bluetooth Pairing with App and AMP
Step 1 : Touch the BT icon CD
Step 2 : Touch the Scan icon® to search the Bluetooth amp.
Step 3 : Bluetooth amp list® to show what amp is paired. (If only one amp
is installed, one amp model number is displayed.)
Step 4: Select the amp model number you want to install from the device
list®
Step 5 : Touch the drop down Icon® to show the version number of App
and amp and to see if the Bluetooth paring is completed
successfully®
Step 6 : Touch Disconnect @to disconnect the amp from the App.

JENSEN
JA SERIES
JENSEN DSP AMP App Operation
Input level Control
(Master Level at HOME
Mode)
X-OVERMode
( JA2B and JA4B )
The input level control (gain) is used to obtain the best
possible match between the head unit audio output
and the amplifier input. Begin
by turning the input level
control fully counterclockwise. Next. turn up the head
unit volume control around 3/4 of the way up. Adjust the
input level control clockwise until audible distortion is
heard, then slightly counterclockwise to provide the best
match. Repeat for all input level controls.
The crossover is used to filter out frequencies above
or below a certain point. Choose LPF when using
the amplifier with subwoofers,
HPF when using with
midrange/tweeter combinations and
FULL when using
with coaxial-type speakers.
Note: Choose FULL when using the amplifier in stereo/
bridged simultaneous mode.
In this mode, passive
crossovers are required. Failure to use the correct
passive components may damage the amplifier and/
or speakers. Consult a qualified professional for
recommendations.
X-OVER Mode JA 18 (Mono) amp works only with LPF.
(JA1B)
X-OVER Control This control allows precise adjustment of the crossover
frequency.
Bass Boost This control provides additional boost@ 45Hz when
used with subwoofers. Adjust this control with caution -
as improper use can damage speakers!
EQ Presets Select between the following EQ presets: Classic. Pop,
Rock, Jazz. Custom (allows user to enter custom EQ
settings).
Custom EQ Custom EQ from EQ Presets is selected to make the
customized audio settings and each gain per frequency
can
be adjusted at EQ Mode of the App.
RGB Color It allows the amp illumination to be turned off or on at
RGB mode of the App. One color or multiple colors can
be controlled.

JENSEN
JA1B
Continuous
PowerOutput :
Dynamic Power :
Maximum
Dynamic
Power:
Specifications
290W RMS x 1 Channel at 40
470W RMS x 1 Channel at 20
595W RMS x 1 Channel aOl(50Hz and 1% THD+N)
300W x 1 Channel
at 50Hz at 4 0
545W x 1 Channel
at 50Hz at 2O
640W x 1 Channel
at 50Hz at 10 (1% THD+N)
325W x 1 Channel at 50Hz at 40
565W x 1 Channel at 50Hz at 20
690W x 1 Channel at 50Hz at 10 (10% THD+N)
...
Signal to Noise: 68dBA reference 1Watt RMS
THD+N: <0.09% at 1Watt RMS from 20Hz to 300Hz
Amplifier dimensions: 2.16"x 9.56"x 5.59"(H x W x D)
JA2B
Continuous
Power Output :
Dynamic
Power :
Maximum
Dynamic Power :
95W
RMS x 2 Channels at 40
105W RMS x 2 Channels at 20
225W RMS x 1 Channel at 40 BRIDGED (1 % THD+N)
100W x 2 Channels at 1kHz at 40
11 OW x 2 Channels at 1kHz at 20
...
230W x 1 Channel at 1kHz at 40 BRIDGED (1 % THD+N)
140W x 2 Channels at 1kHz at 40
170W x 2 Channels at 1kHz at 20
31 OW x 1 Channel at 1kHz at 40 BRIDGED (10% THD+N)
Signal to Noise : 72dBA reference 1Watt RMS
THD+N : <0.14% at 1 Watt RMS from 20Hz to 20kHz
Amplifier dimensions: 2.16"x 6.57"x 5.59"(H x W x D)
JA4B
Continuous
Power Output :
Dynamic
Power:
Maximum
Dynamic Power:
90W RMS x 4 Channels at 40
115W RMS x 4 Channels at 20
230W RMS x 2 Channels at 40 BRIDGED (1% THD+N)
100W x 4 Channels
at 1kHz at 40
125W x 4 Channels at 1kHz at 20
255W x 2 Channels at 1kHz at 40 BRIDGED (1 % THD+N)
125W x 4 Channels at 1kHz at 40
185W x 4 Channels at 1kHz at 20
365W x 2 Channels at 1kHz at 40 BRIDGED (10% THD+N)
Signal to Noise : 70dBA
reference 1 Watt RMS
THD+N : <0.15% at 1 Watt RMS from 20Hz to 20kHz
Amplifier dimensions: 2.16"x 8.38"x 5.59"(H x W x D)
JA SERIES
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JENSEN
JA SERIES
Troubleshooting
Problem Cause Adion
+ 12V wire not connected or incorrect Check connections for propervoltage
Unit will not tum on
voltage. REM wire not connected or
(11 ~ 16VDC)
(no power LED
incorrect voltage
indicator)
GND wire not connected Check connection to ground
Fuse(s) blown Replace fuse(s)
Speaker wires not connected Check connections at speakers
Volume turned
all the way down Increase volume level at head unit
Unit has power -
One or more speaker wires touching Insulate all bare speaker wires from
LED is green (but
each other or touching chassis ground each other and chassis ground
no sound)
Speaker(s) defective or damaged Check/replace speaker(s)
Input signal not connected Check high
or low level inputs for
proper connection
Incorrect fuse rating Use fuse(s) with correct rating
Unit blows fuse(s)
+ 12V wire touching chassis ground Check for pinched wire
Speaker(s) defective
or damaged Check/replace speaker(s)
Bad ground connection Make sure amplifier is grounded
to
clean bare metal
Engine noise
Signal ground loop or RFI (radio Re-route RCA cables from existing high
frequency interference) current wiring
One or more speaker wires touching Insulate all bare speaker wires from
each other
or touching chassis ground each other and chassis ground
LED illuminates red
Speaker(s) defective or
Check/replace speaker(s)
(protect mode)
damaged internally (shorted) Adjust speaker load -amplifier
will
Speaker load less than 2 ohms (stereo).
Speaker load less than 4 ohms (bridged) not operate at less than 4 ohms when
bridged
Distorted audio
Incorrect input signal type or Check connections and reduce/adjust
output
input level too high input level
Low audio output
Incorrect input signal type or Check connections and increase/adjust
input level too low input level

JENSEN
JA SERIES
One-Year (or Three-Yea~) Limited Warranty
This warranty gives you specific legal rights. You may
also have other rights which vary from state to state.
Namsung America Inc warrants this product to the
original purchaser to be free from defects in material
and workmanship for a period of one year (or two
years*) from the date of the original purchase.
Namsung America Inc agrees, at our option, during
the warranty period, to repair any defect in material
or workmanship or to furnish an equal new, renewed
or comparable product (whichever is deemed
necessary) in exchange without charges. subject to
verification of the defect or malfunction and proof
of the date of purchase. Subsequent replacement
products are warranted for the balance of the
original warranty period.
Who is covered? This warranty is extended to the
original retail purchaser for products purchased from
an authorized JENSEN dealer and used in the U.S.A.
What is covered? This warranty covers all defects in
material and workmanship in this product. The
following are not covered: software, installation/
removal costs, damage resulting from accident.
misuse. abuse, neglect, product modification,
improper installation, incorrect line voltage,
unauthorized repair or failure to follow instructions
supplied with the product, or damage occurring
during return shipment of the product. Specific
license conditions and copyright notices for the
software can be found via www.jensenmobile.com.
Warranty Coverage
Limited 1-year warranty when purchased from an
authorized Jensen dealer.
or
*Limited 3-year warranty when purchased from and
professionally installed by an authorized Jensen
dealer. (Proof of purchase and Installation required)
What to do?
1. Before you call for service, check the
troubleshooting guide in your owner's manual.
A slight adjustment of any custom controls may
save you a service call.
2. If you require service during the warranty period,
you must carefully pack the product (preferably
in the original package) and ship it by prepaid
transportation with a copy of the original receipt
from the retailer to an authorized service center.
3. Please describe your problem in writing and
include your name. a return UPS shipping address
(P.O. Box not acceptable). and a daytime phone
number with your shipment.
4. For more information and for the location of the
nearest authorized service center please contact
us by one of the following methods:
• Call us toll-free at [phone]
(Monday-Friday, 9:00 a.m. to 5:00 p.m. ESTI
• E-mail us at [email protected]
Exclusion of Certain Damages: This warranty is
exclusive and in lieu of any and all other warranties,
expressed or implied, including without limitation
the implied warranties of merchantability and fitness
for aparticular purpose and any obligation, liability,
right. claim or remedy in contract or tort, whether or
not arising from the company's negligence, actual or
imputed. No person or representative is authorized
to assume for the company any other liability in
connection with the sale of this product. In no event
shall the company be liable for indirect, incidental or
consequential damages.

FCC Compliance
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following
two conditions:
(1) this device may not cause harmful interference. and
(2) this device must accept any interference received. including interference
that may cause undesired operation.
Warning: Changes or modifications to this unit not expressly approved
by the party responsible for compliance could void the user's authority to
operate the equipment.
Note: This equipment has been tested and found to comply with the limits
for a Class B digital device. pursuant
to Part 15 of the FCC Rules. These
limits are designed
to provide reasonable protection against harmful
interference in a residential installation. This equipment generates. uses
and can radiate radio frequency energy and. if not installed and used in
accordance with the instructions. may cause harmful interference
to radio
communications. However. there is
no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio
or television reception. which can be determined by
turning the equipment off and
on. the user is encouraged to try to correct
the interference by one
or more of the following measures:
• Reorient
or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet
on a circuit different from that to
which the receiver is connected.
• Consult the dealer
or an experienced radio/amp technician for help.