Power bass ATM 900.1D Manual de usuario

ATM COMPACT CLASS D AMPLIFIER

Owners Manual

Please read through this manual to familiarize yourself with your new ampliﬁer. Should your PowerBass

AutoSound mobile ampliﬁer ever require service, you will need to have the original dated receipt.

ATM 600.1D

ATM 900.1D

Thank you and Congratulations

Thank you for your decision to purchase a PowerBass USA Autosound mobile ampliﬁer! Our Autosound

ampliﬁers 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 ﬂex-

ibility in designing different subwoofer options.

COMPACT CLASS D AMPLIFIERS

All PowerBass ATM series Class “D” models are single channel dedicated subwoofer ampliﬁers. Unlike

most Full Range ampliﬁers, these models are designed speciﬁcally for low frequencies and are intended

only to power subwoofers. It is important that you closely follow the wiring instructions contained in this

Owners Manual so that you get the most from your PowerBass AutoSound 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 excessively 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.

TECHNICAL FEATURES

• Mono Block Ampliﬁer for Subwoofer

• Latest Class D Technology

• High and Low Level Line Input

• Double Sided Circuit Board Construction

• MOSFET Power Supplies for High Power Output and Best Stability into Low Impedance Loads

• Soft Delay Remote Turn On/Off Circuit to Eliminating Pops and Clicks

• Variable Low Pass Electronic Crossover

• Built-in Fully Adjustable Bass Boost

• Self Diagnostic Protection Circuit with LED Status Indicator for; Impedance Over-load, Speaker Short

Circuit, Thermal Overheating, and DC Output.

• Real 1-ohm Stable Operation with Extensive Output Power Increase

• Custom Tooled Solderless Speaker and Power Terminal Blocks

• Variable Gain Control

• Pass Thru Line Output Jacks

• Remote Gain Control (Included)

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 Own-

ers 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 (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 vehicle’s

chassis 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.

Due to the high power output of the PowerBass Autosound 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.

Fig.1 Mounting Ampliﬁer

MOUNTING THE AMPLIFIER

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.

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.

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 authorized PowerBass Dealer.

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.

• Don’t use a power drill to tighten the power, ground, remote or speaker output

terminals on the ampliﬁer to avoid stripping the terminal screws. It is best to hand

tighten these connections.

CONTROL PANEL LAYOUT

1. POWER Indicator

The clear L.E.D. lights BLUE when the power is on.

2. STATUS Indicator

This L.E.D. turns RED when the built-in protection circuitry is activated. This indicates a problem with the

system in relation to the ampliﬁer (see Troubleshooting Tips).

3. REMOTE Gain

This is the connector port for the Remote Gain Control. Now the ampliﬁers secondary gain circuit can be

adjusted from the driver’s seat.

4. HIGH INPUT

Allows you to connect speaker output from factory radio to ampliﬁer without the use of a low level convertor.

Fig.2 Panel Layout

5. LINE OUT (RCA) Jacks

RCA style pass through output jacks allow for a signal to be sent to other ampliﬁers in a daisy-chain conﬁgura-

tion. Only one Remote Bass Control can be used when multiple bass ampliﬁers are connected.

6. 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 output of 500mV is required for proper operation. However, this input will accept levels up to

4Vrms.

7. 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 5 volts.

8. LPF (Low Pass Filter) Control

This ﬁlter controls low pass of frequencies and is adjustable from 40Hz through 180Hz to eliminate unwanted

high frequencies.

9. SUB SONIC Control

This control is continuously adjustable from 17Hz through 50Hz at 12dB per octave to provide an extra level of

subwoofer protection from bass robbing power at unheard frequencies.

10. BASS FREQ

This control is variable from 30Hz to 80Hz and allows you to choose the exact frequency you want to boost

using the BASS EQ feature.

11. 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, the BASS BOOST can be adjusted to meet your own personal taste.

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.

13. FUSES

For convenience most PowerBass AutoSound ampliﬁers utilize common automotive ATC type fuses. For con-

tinued 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 over current situation. To protect the

vehicles electrical system, an additional fuse should be used within 18-inches of the battery on the 12V+

cable.

ATM 600.1D 25A x 3

ATM 900.1D 30A x 3

14. BATT+ (Power Input Terminal)

This terminal is the main power input for the ampliﬁer and must be connected directly to the positive (+) termi-

nal of the car battery. (see Power Cable Selection Chart for recommended wire gauge for each model).

15. REM (Remote Input Terminal)

All PowerBass AutoSound 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 an electric antenna output, or a remote output. If this is not avail-

able you can wire to the ACC position on the key. An 18 gauge wire is sufﬁcient to run the REMOTE.

16. GND (Ground Input Terminal)

A good quality ground is required for your PowerBass AutoSound D Class ampliﬁer to operate at peak per-

formance. 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

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 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. Remember Bigger is Better!

*** WARNING ***

Disconnect the negative (-) battery terminal before you start any wiring work! The bat-

tery of your car audio system must be disconnected until the entire wiring installation is

completed.

Your PowerBass Autosound 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! For best results we recommend a PowerBass ampliﬁer install

kit, available at your local PowerBass dealer.

• 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 wir-

ing harnesses, fuel pumps etc.)

POWER WIRING AND SIGNAL CONNECTIONS

Fig.3 Power Input Connection

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 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 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

(preferably 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.

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 a Philips 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 screws down securely.

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