Introduction

The Powerbass Class D Mono Amplifier XMA-800D is a powerful audio solution designed for audiophiles and car audio enthusiasts. With a robust output of 800 watts, this amplifier delivers high-quality sound while maintaining efficiency and compactness. Its Class D technology ensures minimal heat generation and maximizes power output, making it ideal for various audio setups. Featuring adjustable gain and low-pass crossover controls, it allows for customized sound tuning. The amplifier is priced at approximately $199.99.

SPECIFICATIONS FOR XMA CLASS D MONO AMPLIFIERS

POWERBASS XTREME CLASS D	XMA-800D
1 Ohms RMS at THD <0.4%	800 x 1
2 Ohms RMS at THD <0.4%	600 x 1
4 Ohms RMS at THD <0.4%	350 x 1
Peak Music Power	1600 watts
External Bridged 2 Ohms RMS	1600 x 1
Signal to Noise Ratio (EIA Rated)	> 100dB
Frequency Response	10Hz - 300Hz
CROSSOVER
Low Pass Filter	25Hz - 250Hz
Crossover Slope	24dB
Sub Sonic Filter	10Hz - 50Hz
Variable Bass EQ	0 - 18dB
Bass Frequency	40Hz - 100Hz
Input Gain Control	250mV - 10.0 V
Fuse Rating / Style	30A x 3
DIMENSIONS
Width (W) x	7.1" (180mm)
Height (H) x	2.0" (51mm)
Length (L) mm	10.4" (264mm)

IMPORTANT NOTES:

Due to continuing improvements these speciﬁcations are subject to change without any notice.
Do not attempt to ﬁx or repair this unit. Unauthorized repairs will void the manufacturer’s warranty.

FUSE NOTE: Due to space limitations, the XMA-2000D and XMA-3000D does NOT use chassis mounted protec-tive fuses. Therefore you must add a fuse and fuse holder (not included) rated at 150A for each XMA-2000D or 250A for each 3000D installed.

TECHNICAL FEATURES

Class D Mono Ampliﬁer
International Rectiﬁer Chip Set
Ultra Low Current Draw
High Damping Control Circuit
High Efﬁciency SMD Circuit Technology
Double Sided Copper Plated PCB
Digital Sound Optimization Circuitry
Quiet Switching
High Current Voltage Ripple Rejection Circuitry
Virtual Silence Turn On/Off Mute Circuit
Temperature Controlled Output Current Limiting Protection
Dual Link Power External Bridging Capable (set to set bridgeable at 2-ohms min)
Wired Remote Level Control
Balanced RCA Input Connectors
40 Click Bass Freq Control
40 Click Sub Sonic Filter Control
40 Click LPF Control
Auto Turn-On Circuitry
Fan Cooling (XMA-1205D only)

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 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.
IMPORTANT: This ampliﬁer is designed for operation in vehicles with 12-volt Negative ground electrical systems only.

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
Electronic (Rosen not Acid Core) Solder

INSTALLATION PRECAUTIONS

NOTE: Proceed only if you are a qualiﬁed installer, otherwise; see your Authorized PowerBass Dealer to professionally install this ampliﬁer. Always wear protective 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.
When connecting ground points, make sure all paint is carefully scrapped 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.

WARNING: Check your vehicle’s owner’s manual before disconnecting the battery. Disconnecting the battery on some vehicles may require an anti-theft code when reconnecting the battery and require the on-board computer to be reset at the dealership. Check with your local dealer if you are uncertain.

MOUNTING THE AMPLIFIER

Due to the high power output of the PowerBass Xtreme Class D 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 malfunction.

MOUNTING LOCATION

Find a clear and well ventilated area to mount your ampliﬁer that is unobstructed by any objects that will cause harm or block ventilation. Despite the fact that this ampliﬁer is compact, it still needs air to cool the heatsink ﬁns. Do not mount under a carpet or an area with dead or stagnant air. Without proper air ﬂow the ampliﬁer may overheat and go into protection where the thermal overload circuitry will shut down the ampliﬁer.

NOTE: Make sure not to block the cooling fan (XMA-1205D only)

The ampliﬁer should be protected from exposure to moisture and direct sunlight. The compact size of the ampliﬁer allows greater ﬂexibility in mounting. 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 authorized PowerBass Dealer.

If mounting under a seat, make sure there is at least 1-inch (2.5cm) of space above the ampliﬁers heatsink to permit proper cooling. You may use the ampliﬁer as a template and mark the four screw locations with a felt tip pen. Set the ampliﬁer aside before drilling. Use caution to make sure there are no objects behind the installation surface that may become damaged during drilling.

NOTE: Do not use a drill with driver bit to mount the ampliﬁer. Excessive force could cause the plastic mounting feet to crack.

WARNING

Upside-down mounting will compromise heat dissipation through the heatsink and could engage the thermal protection circuit.
Try to avoid mounting the ampliﬁer on a subwoofer enclosure, as extended exposure to vibration may cause malfunction of the ampliﬁer.
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 at the battery positive (+) terminal connection. Before making or breaking power connections at the ampliﬁer power terminals, disconnect the DC power wire at the battery end.
The battery of the car audio system must be disconnected until the entire wiring and installation is completed.

CONTROL PANEL LAYOUT

XMA-800D

Line INPUT (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 output of 250mV is required for proper operation. However, this input will accept levels up to 10Vrms.
GAIN Control
This control is used to match the input sensitivity of the ampliﬁer to the particular source unit that you are using up to 10 volts.
AUTO-TURN ON
Eliminates the need to run a dedicated remote wire for ampliﬁer power on/off. Works with high level only (HL-AD2 adapter required as shown on page 13)
PHASE Switch
This switchable control can be used to correct any “phase” or “time delay” effect in the system by bringing the low frequency from the rear of the vehicle to the front.
BRIDGED CONNECTION Port
For externally bridging two of the same model PowerBass Xtreme Class D amps together. Connect the INPUT of the MASTER to a suitable source via a standard telephone wire with RJ11 (4-pin) modular connectors to the jack on the SLAVE ampliﬁer. Then select the MASTER/SLAVE switch properly (see Speaker Output Conﬁguration diagram).
SUB SONIC Control 40 Click Detent Control
This control is continuously adjustable from 10Hz-50Hz at 12dB per octave to provide an extra level of speaker protection from bass robbing power at unheard frequencies.
BASS FREQ Control
This control is variable from 40Hz to 100Hz and allows you to choose the exact frequency you want to boost using the BASS EQ feature.
SLAVE / MASTER Switch
Two like ampliﬁers can be connected together and externally bridged into a single 2-ohm (min) load. The preamp controls on the SLAVE amp will be disabled. Only the ampliﬁer you select as the MASTER will control these functions. The Dual Link Power Doubling Circuit increases the output power as follows.
NOTE: If using only one ampliﬁer this switch should remain in the MASTER position.
- XMA-800D x 2 = 1,600 watts RMS (2 ohms min)
- XMA-1205D x 2 = 2,400 watts RMS (2 ohms min)
- XMA-2000D x 2 = 4,000 watts RMS (2 ohms min)
- XMA-3000D x 2 = 6,000 watts RMS (2 ohms min)
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 varied by the BASS FREQ control, the BASS EQ can be adjusted to meet your own personal taste.
LPF (Low Pass Filter) Control 40 Click Detent Control
This filter allows low pass of frequency and is adjustable from 25Hz through 250Hz to eliminate unwanted high frequencies.
REMOTE LEVEL (RJ12 Jack)
This is the 6-pin connector port for the Remote Level Control. Now the ampliﬁers secondary gain circuit can be adjusted from the driver’s seat.
POWER/STATUS Indicator Light
This clear LED lights BLUE for power and normal operation, or lights RED when there is a problem. This LED will light RED when the built-on protection circuitry is activated. This indicates there is a problem with the system in relation to the ampli-ﬁer (see Troubleshooting Tips pg 30).
SPEAKER Output Terminals
As shown in the wiring diagrams, be sure to observe speaker polarity through the system and speaker impedance.
COOLING FAN
Variable speed fan pulls cool air in - do not block so air can enter (XMA-1205D only)
FUSES
For convenience most PowerBass Xtreme mini ampliﬁers utilize common automotive ATC type fuses. For continued protection in the event that a fuse blows, replace the fuse only with the same value.
CAUTION: These power fuses on the ampliﬁer chassis are for protecting the amp against overdrive. To protect the vehicles electrical system, an additional fuse should be used within 18-inches of the battery on the 12V+ cable.
- XMA-800D 30A x 3
- XMA-1200D 40A x 3
- XMA-2000D 150A (Requires external fuse - not supplied)
- XMA-3000D 250A (Requires external fuse - not supplied)
  NOTE: Due to space limitations, the XMA-2000D and XMA-3000D do NOT use chassis mounted protective fuses. Therefore you must add a fuse and fuse holder (not included) rated at 150A for each XMA-2000D or 250A for each XMA-3000D installed.
BATT+ (Power Input Connection)
This solderless terminal is the main power input for the ampliﬁer and must be connected directly to the positive (+) terminal of the car battery. This solderless terminal accepts up to 4 gauge wire on XMA-800D and XMA-1205, 0 Gauge on XMA-2000/3000 models. (see Power Cable Selection Chart for recommended wire gauge for each model).
REM (Remote Input Connection)
All PowerBass Xtreme ampliﬁers can be turned on by applying 12 volts to this terminal. This can be found on the rear of the source unit in the form of a remote output. If this is not available you can wire to the ACC position on the key. An 18 gauge wire is sufﬁcient to run the REMOTE.
GND (Ground Input Connection)
A good quality ground is required for your PowerBass Xtreme Class D ampliﬁer to operate at peak performance. A short length of cable the same gauge as your power cable should be used to attach the ground terminal directly to the chassis of the vehicle. Make sure that all of the paint is sanded or scraped away to ensure a quality ground connection.

Description

The Powerbass XMA-800D is engineered with the latest Class D technology, ensuring high power output with low current draw and minimal heat generation. This makes it an excellent choice for vehicles where space is limited but powerful bass is desired. The amplifier features a sturdy aluminum heatsink that helps dissipate heat efficiently, ensuring reliable operation even during extended use. The adjustable input sensitivity allows for easy integration with various head units and source devices, making it versatile for different car audio setups.

The amplifier's compact size and lightweight design make installation straightforward and hassle-free. Additionally, the XMA-800D includes comprehensive protection circuitry to safeguard against overheat, overload, and short circuits, providing peace of mind for users.

POWER WIRING AND SIGNAL CONNECTIONS

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 as possible. Using too small of power cable can result in unnecessary over-heating of the ampliﬁer, distortion at high volume levels and might even cause the thermal protection circuitry to shut-off the ampliﬁer. Remember, bigger wire is better!

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 wiring harnesses, fuel pumps etc.)

power_wiring_and_signal_connections_powerbass_class_d_mono_amplifier_xma-800d.png

This ampliﬁer is designed to work within a 9-16 volt DC range. Before any wires are connected, the vehicles electrical system should be checked for correct voltage supply with the help of a voltmeter.

First, check the voltage at the battery with the ignition in the OFF position. The voltmeter should read no less than 12V. If your vehicles electrical system is not up to these speciﬁcations, we recommend having it checked by an auto electrician before any further installation. Once the vehicle is checked, make certain the correct cable gauge is used. We recommend using as large a gauge cable as possible, use the Power Cable Selection Chart to calculate the correct power wire size for your application.

POWER WIRING

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 pre-vent 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 18” 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 bat-tery, but remember to leave the fuse out or circuit breaker “off” until all other cable connections are made.

NOTE: Secondary battery power is required for XMA-2000D and XMA-3000D

GND (Ground)
When grounding your ampliﬁer, locate a metal area close to the ampliﬁer that is good source of ground (preferable the ﬂoor pan). 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.

gnd_(ground)_powerbass_class_d_mono_amplifier_xma-800d.png

Now it’s time to connect the power and ground cables to the ampliﬁer. Cut both cables to length. Strip off 1/2 inch (12mm) 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 an Allen wrench 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 screws down securely by hand.

NOTE: Bare wires should be tinned with solder for maximum current ﬂow.

REM (Remote Trigger)
This terminal must be connected to a switched +12V source. Typically, a remote turn-on lead is provided at the source unit that will turn on and off the ampliﬁer in correspondence with the source. If this lead is not 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 possible, route this wire on the same side of the vehicle as your power cable. Connect the source remote output to the wire. Go back to the ampliﬁer and cut the wire to length. Loosen the screw terminal marked REM on the ampliﬁer. Insert the stripped (bare) portion of the wire into the terminal and tighten the screw securely.

FUSE REQUIREMENTS
While the panel on your PowerBass ampliﬁer may use one or more fuses, these do nothing to protect the vehicle from a dangerous short circuit. It is absolutely vital that the main power lead to the ampliﬁer(s) in the system be fused within 18-inches (45cm) of the connection to the vehicle battery. The value of this fuse (or circuit breaker) should be no greater than the sum of the fuses found on all of the equipment being con-nected to that power wire.

NOTE: Due to space limitations, the XMA-2000D and XMA-3000D do NOT use chassis mounted protective fuses. Therefore you must add a fuse and fuse holder (not included) rated at 150A for each XMA-2000D and 250A for each XMA-3000D installed.

AUTO TURN-ON Button
This unit features a High Level Auto Turn-on circuit that eliminates the need to run a separate Remote Turn-on Lead to the terminal marked REM located between the ampliﬁers BATT+ and GND power terminals. To engage this circuitry make sure the AUTO TURN-ON button is in the ON (out) position. Requires optional HL-AD2 wiring Harness (see page 13). When this button is the OFF (in) position the ampliﬁer will require a dedicated remote wire to power the ampliﬁer. If you are using the RCA Low Level inputs you will need to run the Remote Turn-on wire and set the button to the OFF (in) position.

CONNECTIONS TO AMPLIFIER FOR BATT+, GND, REM AND SPEAKERS
Your PowerBass Xtreme amplifier features specially tooled solderless terminals for Power (BATT+), Ground, Remote, and Speaker connections. For maximum transfer of Voltage and Signal the bare wire needs to be inserted as far as possible into the terminal before tightening the set screw. For Power (BATT+) and Ground connections it is highly recommended that the bare ends of the wires are tinned with solder before inserting them into the terminal. Hand tighten the set screw and make sure the connection is secure to prevent possible arcing due to loose screws.

RCA INTERCONNECT WIRING

Low-Level Input

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.
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.

HIGH INPUT PLUG

The balanced input of this XMA series ampliﬁer can receive either low RCA or high speaker lead level signals from the source unit (radio). A high level signal can be run from the source units speaker lead outputs to the low level RCA ampliﬁer inputs via the PowerBass HL-AD2 wiring harness (available separately as shown below).

SET UP ADJUSTMENTS

Input GAIN Adjustment
This control 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 four simple steps:

Make sure that the remote level control is not plugged in until after the master gain control is set.
Set the GAIN control on the ampliﬁer to Min (completely counter clock wise).
Turn on the head unit and adjust volume to 2/3 maximum, and set the BASS and TREBLE to zero.
Adjust the GAIN control clockwise until the sound just begins to distort, then back off slightly to cut distor-tion and operate at optimum gain.

input_gain_adjustment_powerbass_class_d_mono_amplifier_xma-800d.png

SUB SONIC 40 Click Detent Control
The subsonic control will ﬁlter out all frequencies below where the control is set and prevent those frequencies from going to your subwoofer(s). This will prevent your subs from playing any low frequencies that may harm the speaker. When this ampliﬁer is used with a subwoofer in a Vented Woofer application it is important to set the frequency of the ﬁlter to cutoff ½ octave below the vent frequency.

This will prevent the woofer unloading from bass notes which are too low for the vented woofer. Once the woofer is unloaded it is operating as a free air driver and may experience damage by striking the back plate or by shearing off the spider. Proper setting of the subsonic ﬁlter is critical.

See the chart on page 28 to set the subsonic ﬁlter to the precise cutoff frequency.

sub_sonic_40_click_detent_control_powerbass_class_d_mono_amplifier_xma-800d.png

LPF (Low Pass Filter) Adjustment
The crossover frequency adjustment ﬁlters out frequencies that you don’t want your subwoofer(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.

See the chart on page 28 to set the Low Pass ﬁlter to the precise frequency.

lpf_(low_pass_filter)_adjustment_powerbass_class_d_mono_amplifier_xma-800d.png

Adjusting the BASS EQ and BASS FREQ Controls

The BASS EQ is adjustable from 0-18dB, thus allowing you to tailor your sound system to your particular tastes.
The BASS FREQ control has 40 click detents that allow you to choose precisely the frequency the BASS EQ will boost. Refer to the chart on page 28 and ﬁnd the setting of the BASS FREQ and determine what frequency you want the BASS EQ to boost.
You will want to experiment with both controls—begin your adjustments at low volume.
Next turn the BASS EQ control about half-way up. Adjust the controls until you ﬁnd the right combina-tion that sounds best with the music you listen to most.

NOTE: More is not always better. By turning the BASS EQ all the way up to 18dB you can overwork the ampliﬁer and send the unit into thermal protection.

adjusting_the_bass_eq_and_bass_freq_controls_powerbass_class_d_mono_amplifier_xma-800d.png

REMOTE LEVEL Controller Connection
Your PowerBass Xtreme Class D amp includes a Remote Level control module. It uses standard telephone wire and telephone RJ12 connectors. To connect the Remote Level Control to the ampliﬁer, simply insert one end of the 6-pin telephone plug into the REMOTE LEVEL port. Plug the other end into the remote module. Install the module within easy reach on or under your dash.

SPEAKER WIRING AND CONFIGURATIONS

Speaker Load
The minimum speaker impedance is 1 ohm. Unless you are externally bridging two XMA ampliﬁers in which case the minimum load is 2-ohms. If you are unsure of calculating impedance loads please consult your Authorized PowerBass Dealer before damaging your ampliﬁer.

Lower impedance will send the ampliﬁer into protection and possibly damage the electronics inside.

Note: Know your load before connecting speakers.

SPEAKER OUTPUT CONFIGURATIONS

Speaker Wiring
Choose the correct speaker wire for your application. We recommend a minimum of 14 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.

At the ampliﬁer end, insert the stripped (bare) speaker wires into the properly marked terminals. Use an Allen wrench 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.

NOTE: It is highly recommended that an Allen wrench is used to tighten the set screws in the terminal blocks by hand and NOT a power drill. This will prevent stripping or other possible damage to the ampliﬁer.

XMA-800D SPEAKER OUTPUT CONFIGURATIONS

1-OHM STABLE DESIGN Minimum Impedance Load is 1-Ohm

1. A SINGLE VOICE COIL SUBWOOFER SPEAKER

2. TWO SINGLE VOICE COIL SUBWOOFER SPEAKERS

(Note: Don’t connect speaker impedance under 1 ohm)

DUAL LINK AMP TO EXTERNAL BRIDGING XMA-800D
The PowerBass XMA Class D Mono ampliﬁers are equipped with a special Dual Link circuitry that allows you to link (strap) two like ampliﬁers together and double the output power at a minimum 2-ohm load.

External Bridging two ampliﬁers (must be the same models) can be done via the MASTER and SLAVE switches, BRIDGGED CONNECTION cable and proper speaker wiring. Doing so will allow only the preamp controls (Gain, X-Over, Subsonic, Bass EQ, etc) on the MASTER ampliﬁer to control both ampliﬁers. The preamp controls on the SLAVE ampliﬁer will become inactive. This holds true for the Remote Level Control as well, it will only function with the MASTER ampliﬁer.

Follow the preceding diagrams carefully when using the Dual Link function. Make sure the MASTER and SLAVE switches are properly selected on each ampliﬁer as shown in Fig 16. Failure to do so will result in damage to the system.

NOTE: This switch should always be set to the MASTER position for standard operation of one ampliﬁer. Changing the position to SLAVE will result in no output

dual_link_amp_to_external_bridging_xma-800d_powerbass_class_d_mono_amplifier_xma-800d.png

Plug the RJ-11 (4-pin) telephone-style cable into the BRIDGED CONNECTION port on both ampliﬁers.

When conﬁgured for Dual Link (external bridging) the minimum impedance load increases from 1-ohm to 2-ohms. DO NOT install or use these ampliﬁers by wiring woofers rated at 2-ohm or lower in parallel to achieve a 1-ohm (or lower) total impedance.

The mono woofer must be connected between the speaker positive (+) terminals of the two ampliﬁers and use at least 12-gauge speaker wiring. Install a 12-gauge wire link between the speaker negative (-) termi-nals of the two bridged ampliﬁers. Permanent ampliﬁer damage, smoke and overheating could result from improperly bridging the ampliﬁers.

DUAL LINK CAUTION! When externally bridging the speaker outputs as shown above, the ampliﬁer must see a 2-ohm load or higher. If an impendance load of less than 2-ohms is used, you will eventu-ally damage the internal electronic components and void your warranty!

40 CLICK PRECISION ROTARY CONTROLS

These controls allow precise set-ting of the electronic crossover and subsonic settings on the ampliﬁer, thus taking the guesswork out of tuning your speakers. Using a small slotted screwdriver make sure the controls are turned all the way to the left (counter clockwise). Refer to the chart and count the clicks (advancing one detent at a time clockwise) until you have reached the desired frequency.

This precise method of setting the crossover controls is available for the LPF, SUBSONIC and BASS FREQ features on this ampliﬁer.

XMA-800D

Click Position	Low Pass Freq	Subsonic Freq	Bass Freq
1	33Hz	10Hz	46Hz
2	33Hz	10Hz	46Hz
3	33Hz	10Hz	46Hz
4	33Hz	10Hz	46Hz
5	33Hz	10Hz	46Hz
6	33Hz	10Hz	46Hz
7	33Hz	10Hz	47Hz
8	34Hz	10Hz	47Hz
9	34Hz	11Hz	47Hz
10	34Hz	12Hz	48Hz
11	35Hz	12Hz	48Hz
12	37Hz	13Hz	49Hz
13	39Hz	13Hz	50Hz
14	41Hz	14Hz	52Hz
15	43Hz	14Hz	53Hz
16	45Hz	15Hz	54Hz
17	47Hz	15Hz	56Hz
18	49Hz	16Hz	58Hz
19	52Hz	16Hz	59Hz
20	56Hz	17Hz	61Hz
21	59Hz	17Hz	62Hz
22	62Hz	18Hz	64Hz
23	69Hz	19Hz	67Hz
24	72Hz	21Hz	69Hz
25	78Hz	23Hz	71Hz
26	84Hz	24Hz	74Hz
27	92Hz	26Hz	77Hz
28	102Hz	29Hz	80Hz
29	125Hz	32Hz	82Hz
30	145Hz	36Hz	86Hz
31	170Hz	42Hz	90Hz
32	187Hz	43Hz	94Hz
33	200Hz	47Hz	96Hz
34	225Hz	49Hz	98Hz
35	240Hz	50Hz	100Hz
36	248Hz	51Hz	100Hz
37	255Hz	52Hz	101Hz
38	258Hz	53Hz	101Hz
39	262Hz	54Hz	102Hz
40	265Hz	54Hz	102Hz

RECOMMENDED WIRE SIZES

Power Cable Selection Chart
Fuse Total	4Ft	4-7Ft	7-10Ft	10-13Ft	13-16 Ft	16-19 Ft	19-22 Ft
In Amperes	Length of Wire/Gauge
250A+	1/0	1/0	1/0	1/0	1/0	1/0	1/0
150A - 200A	2 GA	2 GA	2 GA	1/0	1/0	1/0	1/0
125A - 150A	4 GA	4 GA	4 GA	4 GA	2 GA	2 GA	2 GA
105A - 125A	8 GA	8 GA	8 GA	4 GA	4 GA	4 GA	2 GA
85A - 105A	8 GA	8 GA	8 GA	4 GA	4 GA	4 GA	4 GA
65A - 85A	10 GA	8 GA	8 GA	8 GA	4 GA	4 GA	4 GA
50A - 65A	10 GA	10 GA	8 GA	8 GA	8 GA	8 GA	8 GA

PowerBass makes several types of amplifier wiring kits to assist with your installation. Consult your local PowerBass dealer for details. For more information about recommended power wire check out our website at https://www.powerbassusa.com

TROUBLESHOOTING

Problem	Solution
Power LED not ON	With a Volt Ohm Meter (VOM) check: • +12 Volt powerterminal (should read+12 to +16VDC Remote turn-on terminal (should read +12 to+16VDC) Ground Terminal
Power LED lights BLUE, no output	Check RCA connections Test speaker outputs with knowngood speaker Substitute known good SourceUnit Check for signal on the RCA cable withVOM in AC position Make sure the SLAVE/MASTER switch is set to the MASTER position
Red Status Protection LED is ON,no output and Amp is VERY HOT Amp shuts down ONLY when the vehicle is running Amp has no output	Thermal protection is engaged. Check for proper impedance at speaker terminals. Also checkfor adequate airflow around the amplifier. Voltage protection engaged. Voltage tothe amp isnot within the 10-16VDC operating range.Have the battery/charging system inspected. Possible short circuit. Check speaker wiring. Must complete- ly turn off amplifier and restart to resume play.
Alternator noise (varies with RPM)	Check for damaged RCA cable. Check routing of RCA cable Check Source Unit for good ground Check amp gain setting, turn down if set too high
Poor Bass Response	Check speaker polarity, reverse the connection of one speaker only.

NOTE: If the Status L.E.D. is activated and glows RED with no speakers connected to the ampliﬁer, and all the power connections are correct, this would indicate an internal problem with the ampliﬁer. Contact PowerBass USA or your local dealer.

WARRANTY POLICY

PowerBass Xtreme Ampliﬁers are to be free of defects in material and workmanship for a period of one (1) year.

This warranty covers only the original purchaser of PowerBass product. In order to receive service, the purchaser must provide PowerBass with the receipt stating the consumer name, dealer, product and date of purchase.

Powerbass XMA-800D Pros & Cons

Pros

High Efficiency: Class D technology reduces heat generation and conserves energy.
Compact Design: Easy installation in tight spaces without compromising on performance.
Flexible Input Sensitivity: Adjustable sensitivity for easy integration with various head units.
Durable Construction: Sturdy aluminum heatsink ensures long-lasting performance.
Comprehensive Protection Circuitry: Safeguards against common issues like overheating and short circuits.

Cons

Limited Frequency Response: Designed specifically for subwoofer applications; not suitable for full-range speakers.
No Built-in Crossover Controls: Requires external crossover settings if needed.

Customer Reviews

Customers praise the Powerbass XMA-800D for its robust performance and reliable operation. Many users appreciate its compact size and ease of installation. However, some reviewers note that it lacks built-in crossover controls which may require additional equipment setup. Overall, it is well-regarded among car audio enthusiasts seeking powerful bass output without breaking the bank.

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