DPA250
INSTALLATION/OWNER’SꢀMANUAL
MobileꢀPowerꢀAmplifier
DPA250ꢀINSTALLATION
ConnectionꢀDescriptions
NOTE
Beꢀsureꢀtoꢀfollowꢀspecificꢀinstructionsꢀincludedꢀwithꢀyourꢀamplifierꢀinstallationꢀkit
(notꢀincludedꢀwithꢀthisꢀamplifier).ꢀTheꢀinformationꢀbelowꢀshouldꢀbeꢀusedꢀaꢀgeneralꢀ
guidelineꢀonly.
PowerꢀWireꢀ(+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.
GroundꢀWireꢀ(GND)
• The amplifier ground wire should be as short as possible. 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.
RemoteꢀTurn-onꢀWireꢀ(REM)
• The remote turn-on wire connects to the head unit's amplifier turn-on lead or power
antenna output.
SpeakerꢀWires
• 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.
InputꢀSignalꢀ
• The amplifier's input signal connects to the head unit's low level (RCA) outputs.
CAUTION
• Never run any wires underneath or outside the vehicle.
3
DPA250ꢀINSTALLATION
ConnectionsꢀandꢀControlꢀLocations
1
2
3
4
5
6
7
8
9
10
11
12
RCA Line Inputs
Ground Connection
1
2
3
4
5
6
7
8
Gain Control
Remote Connection
9
Crossover Frequency Control
Crossover Mode
+12VDC Battery Connection
Fuse
10
11
12
Bass Boost
Speaker Connections
Treble Boost
Power/Protect LEDs
4
DPA250ꢀINSTALLATION
TypicalꢀWireꢀRouting
MainꢀPowerꢀConnections
Connect +12V, GND and REM wires accordingly. A suitable fuse MUST be installed on the
+12V lead within 18" of the battery for protection of the vehicle’s electrical system.
FuseꢀRating
When replacing the fuse, make sure new
fuse is the correct type and amperage. Using
an incorrect fuse could damage the amplifier.
Power/GroundꢀWireꢀSize
For optimum performance, use only the wire
size listed below or larger. Make sure to use
the same size power and ground wire.
DPA250ꢀ15 amp ATO x 1
DPA250 10 awg
5
DPA250ꢀINSTALLATION
AmplifierꢀConnections
2ꢀSpeakersꢀ(stereo)
Subwooferꢀ(mono)
SpeakerꢀConnections
Connect speaker wires observing
polarity. The minimum impedance
load is 2 ohms stereo and 4 ohms
bridged. Use of loads lower than
these is not recommended and
may cause amplifier damage.
The DPA250 can be wired for
stereo, bridged or stereo/bridged
simultaneous operation.
TypicalꢀBridgedꢀWiring
TypicalꢀStereoꢀWiring
(4ꢀohmsꢀminimum)
(2ꢀohmsꢀminimum)
InputꢀSignalꢀConnections
LowꢀLevelꢀInputꢀ(RCA)
Low level (RCA) input signal is preferred for best performance. If your head unit does not
include low level (RCA) outputs, an optional high-to-low adapter may be required (sold
separately). 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.
6
DPA250ꢀINSTALLATION
Configuration/Setup
InputꢀlevelꢀControl
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.
CrossoverꢀMode
The crossover is used to filter out frequencies above or
below a certain point. Choose LPF when using the amplifier
with subwoofers, or 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.
CrossoverꢀFrequencyꢀ
Control
This control allows precise adjustment of the crossover
frequency from 50Hz ~ 300Hz.
BassꢀBoost
This control provides additional boost @ 45Hz when used
with subwoofers. Adjust this control with caution - as
improper use can damage speakers!
TrebleꢀBoost
This control provides additional boost @ 5kHz when used
with subwoofers. Adjust this control with caution - as
improper use can damage speakers!
LEDꢀIndicators
The POWER LED indicator illuminates green during normal
operation.
The PROTECT LED indicator illuminates red when the
amplifier detects a fault.
7
DPA250ꢀWARRANTY
LimitedꢀOne-YearꢀWarrantyꢀ
This warranty gives you specific legal
rights. You may also have other rights
which vary from state to state.
Whatꢀtoꢀdo?
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.
Dual Electronics Corp. warrants this
product to the original purchaser to be free
from defects in material and workmanship
for a period of one year from the date of
the original purchase.
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
Dual Electronics Corp. 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.
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:
Whoꢀisꢀcovered? This warranty is extended
to the original retail purchaser for products
purchased from an authorized Dual dealer
and used in the U.S.A.
• Call us toll-free at 1-866-382-5476
• E-mail us at [email protected]
Whatꢀisꢀcovered? This warranty covers all
defects in material and workmanship in
this product. The following are not covered: Exclusion of Certain Damages: This
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
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 a particular purpose and any
obligation, liability, right, claim or remedy
in contract or tort, whether or not arising
from the company’s negligence, actual
license conditions and copyright notices for or imputed. No person or representative
com.
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.
8
DPA250ꢀOPERATION
Specificationsꢀ
CEA-2006 Power Standard Specifications
(reference:ꢀ14.4VDC,ꢀ20Hz~20kHz)
Power Output (14.4VDC, 20Hz ~ 20kHz):
ꢀ 35ꢀWattsꢀRMSꢀxꢀ2ꢀchannelsꢀ@ꢀ4ꢀohmsꢀandꢀ≤ꢀ1%ꢀTHD+Nꢀ
ꢀ
ꢀ 50ꢀWattsꢀRMSꢀxꢀ2ꢀchannelsꢀ@ꢀ2ꢀohmsꢀandꢀ≤ꢀ1%ꢀTHD+N
ꢀ 100ꢀWattsꢀRMSꢀxꢀ1ꢀchannelꢀ@ꢀ4ꢀohmsꢀ(bridged)ꢀandꢀ≤ꢀ1%ꢀTHD+N
Totalꢀdynamicꢀpower:ꢀ250ꢀWattsꢀ@ꢀ4ꢀohms
Signalꢀtoꢀnoiseꢀratio:ꢀ75dBAꢀ(reference:ꢀ1ꢀwattꢀintoꢀ4ꢀohms)
Frequencyꢀresponse:ꢀ20Hzꢀ~ꢀ20kHzꢀ(+/-3dB)
Amplifierꢀdimensions:ꢀ8.27”(L)ꢀxꢀ7.09”(W)ꢀxꢀ1.97”(D)ꢀ
Typicalꢀinstallationꢀdimensions:ꢀ10”(L)ꢀxꢀ10”(W)ꢀxꢀ3”(D)ꢀ
Design and specifications subject to change without notice.
9
DPA250ꢀOPERATION
Troubleshooting
Problem
Cause
Action
Unitꢀwillꢀnotꢀturnꢀon +12V wire not connected or incorrect voltage Check connections for proper voltage
(noꢀpowerꢀLEDꢀindicator) REM wire not connected or incorrect voltage (11~16VDC)
GND wire not connected
Check connection to ground
Fuse(s) blown
Replace fuse(s)
Unitꢀhasꢀpowerꢀ-ꢀpowerꢀ Speaker wires not connected
Check connections at speakers
Increase volume level at head unit
LEDꢀisꢀgreenꢀ
(butꢀnoꢀsound)
Volume turned all the way down
One or more speaker wires touching each Insulate all bare speaker wires from each
other or touching chassis ground
other and chassis ground
Speaker(s) defective or damaged
Check/replace speaker(s)
Input signal not connected
Check low level inputs for proper
connection
Unitꢀblowsꢀfuse(s)
Engineꢀnoise
Incorrect fuse rating
Use fuse(s) with correct rating
Check for pinched wire
+12V wire touching chassis ground
Speaker(s) defective or damaged
Bad ground connection
Check/replace speaker(s)
Make sure amplifier ground wire is
connected to clean bare metal
Signal ground loop or RFI (radio frequency Re-route RCA cables from existing high
interference) current wiring
ProtectꢀLEDꢀilluminatesꢀ One or more speaker wires touching each Insulate all bare speaker wires from each
red
other or touching chassis ground
other and chassis ground
(protectꢀmode)
Speaker(s) defective or
Check/replace speaker(s)
damaged internally (shorted)
Speaker load less than 2 ohms (stereo)
Speaker load less than 4 ohms (bridged)
Adjust speaker load - amplifier will not
operate at less than 4 ohms when bridged
Distortedꢀaudioꢀoutput Incorrect input signal type or
Check connections and reduce/adjust input
level
input level too high
Lowꢀaudioꢀoutput
Weakꢀbass
Incorrect input signal type or
input level too low
Check connections and increase/adjust
input level
Speaker(s) are wired out of phase
Check (+) and (-) speaker connections
(Observe correct polarity)
10
DPA250ꢀOPERATION
Notes
11
Dual Electronics Corp.
Toll Free: 1-866-382-5476
©2012 Dual Electronics Corp.
NSA0412-V01
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