Power bass XTA 4000D User manual

XTREME SERIES CLASS D AMPLIFIER
Owners Manual
Please read through this manual to familiarize yourself with your new amplifier. Should your PowerBass
Xtreme mobile amplifier ever require service, you will need to have the original dated receipt.
XTA 4000D
XTA 5000D

Thank you and Congratulations
Thank you for your decision to purchase a PowerBass Xtreme mobile amplifier! Our PowerBass Xtreme am-
plifiers are the result of extensive engineering, testing, and bullet proof construction. They feature the latest
in D Class microprocessor technology. Their versatility enables compatibility with optional signal and audio
processors. These high quality MOSFET amplifiers may be configured to allow maximum flexibility in designing
different type of speaker systems.
D CLASS BASS AMPLIFIERS
All PowerBass XTA series “D” models are single channel dedicated subwoofer amplifiers. Unlike most Full
Range amplifiers, these models are designed strictly for low frequencies and are intended only to power sub-
woofers. It is important that you closely follow the wiring instructions contained in this Owners Manual so that
you get the most from your PowerBass Xtreme D Class mobile amplifier.
∆Caution ∆
High powered audio systems in a vehicle are capable of generating higher then “Live Concert” levels of sound pressure. Continued exposure to exces-
sively high volume sound levels will cause hearing loss or damage. Also, operation of a motor vehicle while listening to audio equipment at high volume
levels may impair your ability to hear external sounds such as horns, warning signals, or emergency vehicles—thus creating a potential traffic hazard.
In the interest of safety, PowerBass USA highly recommends listening at lower volume levels when driving.
AMPLIFIERS
3

Keys To Safe Installation
Since you are reading this, you’re probably reading the manual; hopefully very carefully. We have
warnings here for your protection. Please pay close attention to the warnings in this manual.
This will help give you years of safe listening enjoyment.
The PowerBass XTA5000D can develop over 5000 watts RMS, and can draw well over 400 Amps.
Let’s do some math (I know, we all hate math, but bear with me) your car probably has an alter-
nator that produces about 100 Amps. Your car probably uses about 75 of those amps, leaving
just 25 Amps for your system. Since the XTA5000D peak draws about 400 Amps you are going
to come up short by 375 Amps. You WILL NEED to upgrade your charging system to run this
amplifier in your car. This will include changing your alternator, or adding alternators, adding 2
or more dedicated audio system batteries, and doing the BIG 3. What’s the BIG 3, you ask? This
is upgrading the wires from the alternator(s) positive (+) to the batteries (usually to 1/0 or 2/0
gauge wire), from the engine block to the chassis (usually to 1/0 or 2/0 gauge wire) and the wire
from the battery negative (-) to the chassis (again, usually to 1/0 or 2/0 gauge wire.)
Now that you have upgraded your charging system and wiring you are ready to install your ampli-
fier. Make sure you install fuses at most 12” from the battery (this is to protect your car from
accidental short) and at most 18” from the amplifier (this is to protect your amplifier from ac-
cidental overload.) The XTA5000D will require two 300 Amp ANL type fuses (one on each power
cable) at the battery and two 200 Amp ANL type fuses at the amplifier. You will need to use 1/0
gauge power cable for each power connection, and you will need to use both power connections
for this amplifier to work properly. The XTA4000D will require one 300 Amp ANL type fuse at the
battery (to protect your car from accidental short) and one 300 Amp ANL type fuse at the amplifier
(to protect the amplifier from accidental overload.)
Let’s think about output for a moment; 5000 watts RMS is a lot of power. Your toaster, plugged
into the wall (home voltage is 117.5 volts RMS) will draw about 15 Amps. 117.5 * 15 = 1762.5
watts. 5000 watts is almost 3 times that. Have you ever put your hand in the toaster? Doubtful.
Why not? Because it would hurt, that’s why. The XTA5000D will produce enough power on the
speaker outputs to kill you. It’s enough power to stop your heart. You MUST be careful with the
output terminals, and the wires you connect to it.

TECHNICAL FEATURES
• Mono Block Amplifier for Subwoofer
• Latest Technology D Class Operation
• MOSFET Power Supplies for high power output and best stability into low impedance loads
• Soft Delay Remote Turn On/Off System for eliminating pop noise
• Built-in Fully Adjustable Electronic Crossover Network with Bass EQ
• Self Diagnostic Multi Protection Circuit with LED Indicator for; Impedance Over-load, Speaker Short
Circuit, Thermal Overheating, and DC Output.
• Real 1-ohm Stable Operation with Output Power Increasing
• Heavy-duty Brass CNC Machined Terminal Blocks
• Variable Gain Control
• Available Dual Link Amp Strapping (Set-to-Set Bridgeable at 2 ohm)
• Blue Power-on Edge-lit PowerBass Logo
INSTALLATION EXPERIENCE
Installation of PowerBass mobile amplifiers requires detailed knowledge of electronics wiring and proper
speaker impedance. We strongly recommend installation by an authorized PowerBass Xtreme dealer. This
Owners Manual only provides general installation and operation instructions. If you have any reservations
about your installation skills, please contact your local PowerBass dealer for assistance.
PREPARING FOR INSTALLATION
NOTE: The tools listed below may be required for basic installation
• An electric drill with bits
• Philips head and standard screwdrivers
• Wire strippers
• Crimping tool
• VOM (electronic volt ohm meter)
• Heat shrink tubing and heat gun
• Soldering iron
INSTALLATION PRECAUTIONS
NOTE: Proceed only if you are a qualified installer otherwise, let your dealer do it. Always wear protec-
tive eyewear when using tools.
• Turn off all stereo and other electrical devices before you begin.
• Disconnect the negative (-) lead from your vehicles battery.
• Locate all fuel lines, brake lines, oil lines, and electrical cables when planning the install.
• Make sure there is at least 2-inches (5 cm) around the air vents on the amplifier.
5

Due to the high power output of the PowerBass Xtreme D Class amplifiers, considerable heat may be produced
when the unit is in operation. For this reason the amplifier should be mounted in a location which will allow air
to circulate freely. A clearance of at least 2-inches (5 cm) to all sides of the amplifier is necessary not only for
proper cooling, but also for gaining access to the inputs and other variable controls. Be sure that the power
and signal cable connections can enter and leave the amplifier in a straight line to avoid the risk of kinked
wires causing a malfunction.
MOUNTING LOCATION
Your PowerBass Xtreme D Class amplifier comes with mounting feet that may need to be attached to the am-
plifier prior to installation. Once the feet are in place, use the amplifier as a template and mark the four screw
locations. Use caution to make sure there are no objects behind the installation surface that may become
damaged during drilling. Remember your car has many hidden electrical wires and various gas, vacuum and
brake lines.
Fig.1 Mounting Amplifier
MOUNTING THE AMPLIFIER
• When connecting ground points, make sure all paint is carefully scraped away from the auto body and
contact is make with bare metal.
• Use a utility knife to trim away fabric from hole locations before drilling or cutting.
• When running power cables through sheet metal, be sure to use grommets to properly insulate the
metal edges from the wire insulation.
• If possible, use tubing through grommets.

FUSE RECOMMENDATION
The XTA5000D and XTA4000D do NOT come with any internal fusing! Due to the current demands a typical
chassis mounted fuse is not practical. We recommend that you install the correct size fuse/holder combina-
tion to the main power cable within 12-inches of the battery. This will protect your vehicle from fire damage
due to a short circuit to the chassis or vehicle body.
For each XTA5000D amplifier installed, use two 200A ANL type fuses (not included).
For each XTA4000D amplifier installed, use one 300A ANL type fuse (not included).
*** WARNING ***
• Do not install in a place where it could injure the driver or passengers if the vehicle
stops suddenly.
• Upside down mounting will compromise heat dissipation through the heatsink and
could engage the thermal protection circuit causing the amplifier to shut down.
• Try to avoid mounting the amplifier on a subwoofer enclosure, as extended exposure
to vibration may cause the amplifier to malfunction.
• Don’t mount the amplifier so that the wire connections are unprotected or are sub-
ject to pinching or damage from nearby objects.
• The DC power wire must be fused a maximum of 12” from the battery positive (+)
terminal. Before making or breaking power connections at the amplifier power ter-
minals, disconnect the DC power wire at the battery end.
• The battery supply of the car audio system must be disconnected until the entire
wiring and installation is completed.
The amplifier should be protected from exposure to moisture and direct sunlight. The best places to mount
your amplifier are: The floor of the trunk, under the driver’s seat, or on the back of the rear seat. For alternate
installation locations, please consult your dealer.
7

CONTROL PANEL LAYOUT
1. LINE OUT (RCA) JACKS
RCA style output jacks allow for unfiltered signal to be sent to other amplifiers or processors. Only one Remote
Gain Control can be used when multiple bass amplifiers are connected.
2. LINE IN (RCA) JACKS
These RCA style input jacks are for use with source units that have RCA line level outputs. A source unit with a
minimum of 200mV is required for proper operation. However, this input will accept levels up to 6.5V rms.
3. GAIN Control
This control is used to match the input sensitivity of the amplifier to the particular source unit that you are
using.
Fig.2 Panel Layout
REMOTE
LINE OUT LINE IN
L L
R
– + – +
R
SLAVE
OUT
IN
MASTER SLAVE
DO NOT BRIDGE POWER
GNDREMBATT+
SPEAKER OUTPUT
MIN MAX
GAIN BASS EQ
0dB 18dB
SUBSONIC
15HZ 50HZ 50Hz 250Hz
LPF
0˚ 180˚
PHASE
POWER
STATUS
1 2
XTA4000D
1
16
12
234
5
679
8
13 14
15
10
11

4. SUB SONIC Control
This filter allows the high pass of frequencies, and is adjustable from 15Hz through 50Hz to provide and extra
level of speaker protection.
5. LPF (Low Pass Filter) Control
This control is continuously adjustable and varies the crossover point from 50Hz to 250Hz at 24dB per oc-
tave.
6. BASS EQ Control
This equalization circuit is used to enhance the low frequency response of the vehicle’s interior. With up to
18dB of boost centered at 45Hz, the BASS EQ can be adjusted to meet your personal taste.
7. PHASE Control
This variable control can be used to correct “phase” or “time delay” effect in the system by bringing the low
frequency from the rear to the front of the vehicle.
8. REMOTE GAIN Port
This is the connector port for the Remote Gain Control. Now the amplifiers output circuit can be adjusted
from the driver’s seat. NOTE: The Remote Gain Control will “max out” at the highest level that the GAIN
Control is set to.
9. MASTER/SLAVE Switch
Two like amplifiers can be connected together and bridged into a single 2 ohm (min) load. The level and fre-
quency controls on the SLAVE amplifier will be disabled. Only the amplifier you select as MASTER will control
these functions.
10. SLAVE OUTPUT Jack
When strapping two like amplifiers together use this jack to send signal to the SLAVE amplifier.
11. SLAVE INPUT Jack
When strapping two like amplifiers together use this jack to receive signal from the MASTER amplifier. When
this is connected all controls will revert to the MASTER amplifier.
12. SPEAKER Output Terminals
As shown in the wiring diagrams, be sure to observe speaker polarity through the system and speaker imped-
ance. This specially tooled terminal is designed to accommodate up to 10 gauge speaker wire.
CAUTION: Do Not Bridge the speaker outputs on these D Class models, this is already a Mono out-
put!
9

13. BATT+ (Power Input Terminal)
This terminal is the main power input for the amplifier and must be connected directly to the positive (+)
terminal of the car battery. (use multi-strand 1/0 cable).
14. REM (Remote Input Terminal)
All Powerbass Xtreme amplifiers can be turned on by applying 12 volts to this terminal. This can be found
a the rear of the source unit (usually the blue with white stripe wire). If there is not a remote turn on lead
the power antenna lead (usually blue) can be used in its place. If neither of these are available you can wire
this to the ACC (accessory) position of the key. This is a signal that is present when the key is on while not
starting. A 16-18 gauge wire is sufficient to run the REMOTE.
15. GND (Ground Input Terminal)
A good quality ground is required of your Powerbass Xtreme D Class amplifier to operate at peak perfor-
mance. A short length of 1/0 cable, the same gauge as your power cable, should be used to attach the
ground terminal directly to the chassis of the vehicle. (If a good ground cannot be found the ground connec-
tion must be run directly to the negative (-) terminal of the battery).
16. POWER/STATUS Indicator light
This clear LED lights GREEN for power and normal operation, and lights RED when there is a problem. This
LED will light RED when the built in protection circuitry is activated. This indicates there is a problem with
the system in relation to the amplifier (see Troubleshooting Tips pg. 25).
FUSE-IMPORTANT
The XTA5000D and XTA4000D do NOT come with any internal fusing! Due to the current demands a typical
chassis mounted fuse is not practical. We recommend that you install the correct size fuse/holder combina-
tion to the main power cable within 12-inches of the battery. This will protect your vehicle from fire damage
due to a short circuit to the chassis or vehicle body.
For each XTA5000D amplifier installed, use two 200A ANL type fuses (not included).
For each XTA4000D amplifier installed, use one 300A ANL type fuse (not included).

*** WARNING ***
Disconnect the negative (-) battery terminal before you start any wiring work! The battery of your
car audio system must be disconnected until the entire wiring installation is completed.
Your PowerBass Xtreme Class D amp will draw large levels of current, so use the largest gauge power/
ground cable possible. Do not “starve” your amplifier by using small power cable. Using under sized power
cable can result in unnecessary over-heating of the amplifier, distortion at high volume levels and may even
cause the thermal protection circuitry to shut off the amplifier.
• Use rubber grommets when running cables through any metal or sharp plastic, to prevent accidental
shorting or shearing. Make sure the cables do not interfere with normal operation of the vehicle.
• The audio signal cables (RCA interconnects) should be kept far away from any potential sources of
electrical interference such as electronic vehicle management systems (relays, engine computers etc.)
wiring harnesses, fuel pumps etc.
WIRING AND CONNECTIONS
Power Input Connections
Fig.3 Power Input Connection for XTA 4000D
Fig.3A Dual Power Input Connections for XTA 5000D. Both sets of power and ground MUST be connected
– + – +
DO NOT BRIDGE POWER
GNDREMBATT+
SPEAKER OUTPUT
POWER
STATUS
1 2
XTA4000D
FUSE HOLDER
Battery Within 12”
of Battery
Remote Turn ON
To Power Antenna
Chassis
Ground
(–)
FUSE HOLDER
Battery Within 12”
of Battery
Remote Turn ON
To Power Antenna
Chassis
Ground
(–)
Chassis
Ground
(–)
FUSE HOLDER
Battery
Within 12”
of Battery
DO NOT BRIDGE POWER 1
GNDREMBATT+
POWER 2
GND BATT+
SPEAKER OUTPUT
1 2
POWER
STATUS
XTA5000D
11

This amplifier is designed to work within a 10 to 16.5 volt DC range. Before any wires are connected, the
vehicles electrical system should be checked for correct supply voltage with the help of a voltmeter.
The gauge of the power and ground cables must be capable of handling the current needed by the entire
system. Power and ground cables must be of the same gauge. If the alternator is not capable of supplying
enough power for both the vehicle AND the audio system, a high output alternator should be installed for best
performance.
The alternator is your main power source, not the battery. Upgrading your alternator should be your first con-
sideration. The next step would be to add an extra battery. Capacitors alone are not the best solution since they
add an additional load to the alternator, just like a battery. After upgrading the alternator, additional batteries
and/or capacitors can be added to the electrical system to stabilize the vehicles power.
BATT+ (Power)
This amplifier should be wired directly to the vehicle battery using the appropriate size cable. Start at the
vehicle battery and run the power cable through to the amplifier. Avoid running the power cable over engine
components and near heater cores. The use of an inline fuse or circuit breaker is a must; this will prevent
the risk of a potential fire caused by a short in your power cable. Connect the fuse holder or circuit breaker
as close to the battery positive (+) terminal as possible (no farther then 12” from that battery). This fuse or
circuit breaker should be no greater then the sum of the fuses found on the chassis of your amplifier (also see
specifications chart). You may now connect the cable to the battery, but remember to leave the fuse out or
circuit breaker “off” until all other cable connections are made.
GND (Ground)
When grounding your amplifier, locate a metal area close to the amplifier that is good source of ground (prefer-
ably the floor pan or chassis). Once again, investigate the area you wish to use for electrical wires, vacuum
lines, and brake or fuel lines. Use either a wire brush or sandpaper to eliminate unwanted paint for better
contact of the ground.
Secure the ground cable to the body using a bolt, star washer and nut. Spread silicon over the screw and bare
metal to prevent rust and possible water leaks. For high current applications it may be beneficial to ground
directly to the battery.
Now it’s time to connect the power and ground cables to the amplifier. Cut both cables to length. Strip off 3/4
inch (20mm) of the insulation so that the bare wire fits all the way in the terminal block on the side panel of
the amplifier, seating it firmly so no bare wire is exposed. Use a Philips (cross) type screwdriver to loosen the
BATT+ and the GND connections on the amplifier. Insert the ground first, and then the +12V and please make
sure that you place them into the correctly marked terminals. Then tighten the set screws down securely.

REM (Remote)
This terminal must be connected to a switched +12V source. Typically, remote turn-on leads are provided at
the source unit that will turn on and off the amplifier in correspondence with the source. If the source unit does
not have a remote turn-on lead, then a power antenna wire can be used. If neither of these leads is available
at the source unit, then a switched +12V supply must be used, like the ACC, +12V.
Run a minimum of 18 gauge wire from the amplifier location to the source of the switched +12V lead. If pos-
sible, route this wire on the same side of the vehicle as your power cable. Connect the source remote output
to the wire. Loosen the screw terminal marked REM on the amplifier using a Philips (cross) type screwdriver.
Insert the stripped (bare) portion of the wire into the terminal and tighten the set screw securely.
WARNING!!
These amplifiers draw extreme amounts of current and must be properly fused as noted
in this manual. To avoid putting yourself and your vehicle at risk, this product should be
installed by an Authorized Powerbass Dealer.
XTA-5000D NOTE: Both sets of power and ground terminals MUST be used on the XTA-
5000D. Failure to use both sets power and ground terminals will lead to amplifier failure,
voidance of the factory warranty and may lead to fire.
13
NOTE: It is highly recommended that a hand screw driver and NOT a power drill is used to
tighten the set screws on the terminal blocks. This will prevent stripping or other possible
damage to the amplifier.

RCA INTERCONNECT WIRING
Choose the correct length and style of RCA interconnects for your needs. Always use high quality RCA audio
cables (not supplied) for signal connections—those with multiple layers of shielding or a twisted pair variety
for better noise rejection.
Most trunk/hatchback installations will require a 15-20 foot (4.5 meter) RCA cable, while pickup trucks will
require a 6-12 foot (2 meter) RCA cable. Connect an RCA cable from the source to the RCA LINE IN on the
amplifier side panel (see fig 4).
Be extra careful when routing your RCA audio interconnect cables. Car environments are notorious for poorly
insulated wires. This means that hiss, engine noise, and fan noise can easily be picked up through RCA
cables if run incorrectly.
Make sure that the cables for power and audio signal are not on the same side of the vehicle and that they
do no cross each other; this will help reduce any noise that may radiate from the power cable and the signal
cable. If an audio cable is too close to a power cable, it may pick up the magnetic field generated by the
power cable, which could lead to a loss of quality in your signal.
If RCA interconnects must cross power cables, noise can best be avoided by crossing them
between 45° and 75°.
Fig.4 Low Level Input using RCA
NOTE: The use of good quality RCA cables is just as important as power and speaker wire. Choose a high quality
low capacitance cable for best results.
CAR RADIO/
SOURCE
RCA
OUTPUTS
REMOTE
LINE OUT LINE IN
L L
RR
SLAVE
OUT
IN
MASTER SLAVE
MIN MAX
GAIN BASS EQ
0dB 18dB
SUBSONIC
15HZ 50HZ 50Hz 250Hz
LPF
0˚ 180˚
PHASE

USER ADJUSTABLE CONTROLS
Your PowerBass Xtreme series amplifier has a full complement of user adjustable controls located on the
front preamp end panel. Before turning on the system for the first time, turn the rotary controls to the full
counter-clockwise position. One by one adjust each control as outlined in the following paragraphs.
Your PowerBass Xtreme D Class amp includes a remote GAIN control module. It uses standard 6-pin telephone
wire and modular (U.S.A. style) telephone connectors. To connect the remote GAIN Control to the amplifier,
simply insert one end of the telephone plug into the REMOTE GAIN port. Plug the other end into the remote
module. Install the module within easy reach on or under your dash.
Please note the GAIN control on the side panel of the amplifier chassis serves as the “main” GAIN control, and
the remote will not exceed the setting of the end panel.
Remote Gain Controller Connection
This control (fig. 6) allows you to match the input level of the amplifier to the output level of your head unit.
Matching the input can be accomplished in three simple steps:
1. Set the volume of GAIN on the amplifier to Min (completely counter clock wise).
2. Turn on the head unit and adjust volume to 2/3 maximum, and set the BASS and TREBLE to zero.
3. Adjust the GAIN control clockwise until the sound just begins to distort, then back off slightly to cut
distortion and operate at optimum gain.
Remember, the gain control is not a volume control. Ignoring these three steps above may leave you with dam-
aged speakers and/or a damaged amplifier.
Input Gain Adjustment
Fig.6 GAIN Control
Fig.5 Connection with RJ12 Jack
GAIN
MIN MAX
15

Sub Sonic Filter Adjustment
The sub sonic control (fig.10) will filter out all frequencies below where the control is set from going to your
subwoofer(s). This will prevent your subs from playing any low frequencies that may harm the speaker.
Phase Adjustment
This control (fig. 9) helps to align the phase shift of a subwoofer for a smooth blending, without canceling the
bass from other speakers or subwoofer(s). This can be extremely useful since some interior dimensions of
certain vehicles can create “dead spots” (cancellations) affecting low bass and mid bass impact.
Fig.10 Sub Sonic Adjustment
Fig.9 Phase Control
LPF (Low Pass Filter) Adjustment
The crossover frequency adjustment (fig. 8) filters out frequencies that you don’t want your speaker(s) to repro-
duce. Using the LPF control, adjust the Low Pass Frequency to limit the amount of mid range you want going
to your woofer(s). Since musical tastes vary, adjust the crossover by ear while listening to the music of your
choice. Be sure to set the tone controls of your source unit to flat before adjusting the crossover.
Fig.8 Low Pass Control
Bass EQ Adjustment
This special feature is designed to provide you boost at 45Hz, and it allows you to boost the real Bass EQ up
to +18dB. Keep in mind that more is not always better. Setting the control (fig. 7) to the max (18dB) will stress
the amplifier and the speakers and could result in damage.
Fig.7 Bass EQ Control
15Hz 50Hz
SUB SONIC
50Hz 250Hz
LPF
0˚ 180˚
PHASE
0dB 18dB
BASS EQ

Speaker Wiring
Choose the correct speaker wire for your application. We recommend a minimum of 12 gauge wire. Route
these using the same precautions as you did when you ran the power cable. Terminate these wires at the
speaker end using insulated speaker terminals (not supplied) or by soldering the connection to the speaker. Be
certain to maintain correct polarity throughout the system. Make sure the speaker connections are positive-
to-positive and negative-to-negative. Most speaker wire has some indicator (color code, ribbing, or printing) on
one of the two wires to help you distinguish the positive (+) and negative (-) leads.
Bridging
Although your XTA-5000D and XTA-4000D have two sets of speaker outputs labeled 1 and 2, they are mono-
block and the outputs cannot be bridged. The two sets of outputs are paralleled inside the amp to a single
channel. This gives you ease during the installation of multiple voice coils or woofers.
The speaker outputs on this Class D amplifier are internally paralleled and are NOT to be bridged.
The speaker’s impedance is divided between both output connections.
Speaker Load
Keep in mind your PowerBass Xtreme D Class amp is a high power amplifier and not a high current amplifier.
In other words it requires a minimum impedance of 1 ohm. Both speaker outputs are internally paralleled, thus
a minimum speaker impedance of 2 ohms is required when using more then one of the speaker outputs. If
you are unsure of calculating impedance loads please consult your PowerBass Xtreme dealer before
damaging your amplifier.
WARNING: Do not try to bridge the speaker outputs of one amplifier by itself. The two sets
of speaker output terminals are internally paralleled on the circuit board of the amplifier.
This means if both outputs are used with one driver each the amplifier sees the same load
as if the same two drivers were connected to only one output terminal.
– + – +
DO NOT BRIDGE
SPEAKER OUTPUT
1 2 – + – +
DO NOT BRIDGE
SPEAKER OUTPUT
1 2
min 1 ohm min 2 ohm each
17

Fig.12 Two Single Voice Coil Subwoofers (2-4 Ohm)
2. TWO SINGLE VOICE COIL SUBWOOFER SPEAKER
(Note: Don’t connect speaker impedance under 2 ohms)
Fig.11 A Single Voice Coil Subwoofer (1~4 ohm)
Too low of an impedance could send your amplifier into protection mode and/or permanently damage the
amplifier.
At the amplifier end, insert the stripped (bare) speaker wires into the properly marked terminals. Use a
Philips (cross) screwdriver to loosen the speaker terminals on the amplifier. Make certain that no bare wire
ends touch each other. Such contact could result in an electrical short and cause the amplifier to turn off
(short circuit protection) or malfunction.
Speaker Output Configurations
1. A SINGLE VOICE COIL SUBWOOFER SPEAKER
– + – +
DO NOT BRIDGE POWER
GNDREMBATT+
SPEAKER OUTPUT
POWER
STATUS
1 2
XTA4000D
– + – +
DO NOT BRIDGE POWER
GNDREMBATT+
SPEAKER OUTPUT
POWER
STATUS
1 2
XTA4000D

Fig.13 One Subwoofer (2-4 Ohm) with Dual Voice Coil
3. ONE DUAL VOICE COIL SUBWOOFER SPEAKER
(Note: Don’t connect speaker impedance under 2 ohms)
– + – +
DO NOT BRIDGE POWER
GNDREMBATT+
SPEAKER OUTPUT
POWER
STATUS
1 2
XTA4000D
4. THREE DUAL VOICE COIL SUBWOOFER SPEAKERS
(Note: Don’t connect speaker impedance under 1 ohm)
Fig.12 Three Dual Voice Coil Subwoofers
2+2 or 4+4 OHM DVC SUBWOOFERS
2+2 Total Impedance = 1.50 ohms
4+4 Total Impedance = 2.67 ohms
– + – +
DO NOT BRIDGE POWER
GNDREMBATT+
SPEAKER OUTPUT
POWER
STATUS
1 2
XTA4000D
19

5. FOUR SINGLE VOICE COIL SUBWOOFER SPEAKERS
(Note: Don’t connect speaker impedance under 1 ohm)
Fig.13 Four Single Voice Coil Subwoofers (1-4 Ohm)
NOTE: It is important that a 1-ohm minimum total speaker impedance load is observed!
If a impedance load of less than the 1-ohm minimum is used, you will eventually damage
your amplifier and void your warranty!
– + – +
DO NOT BRIDGE POWER
GNDREMBATT+
SPEAKER OUTPUT
POWER
STATUS
1 2
XTA4000D