Power bass ATM 330.2 Manual de usuario

ATM COMPACT CLASS A/B 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 330.2

ATM 440.2

ATM 550.4

ATM 660.4

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. 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 types of speaker systems.

COMPACT A/B CLASS FULL RANGE AMPLIFIERS

The PowerBass Atom Series are high quality MOSFET ampliﬁers that are capable of running a system full

range, or they may be selected 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

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

• Low Proﬁle Aluminum Finned Heatsink

• High and Low Level Line Inputs

• Double Sided Circuit Board Construction

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

• Variable High Pass and Low Pass Electronic Crossover

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

• Selectable Bass EQ at 40Hz (0, 6 or 12dB)

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

Short Circuit, Thermal Overheating, and DC Output.

• 2-ohm Stereo Stable (4-ohm Mono Bridgeable)

• Custom Tooled Solderless Speaker and Power Terminal Blocks

• Variable Gain Control

• Fan cooled (ATM 550.4 and ATM 660.4 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 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 chassis

and contact is made 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.

To keep your PowerBass Atom ampliﬁer running at top performance, choosing the proper location is of

utmost importance. 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. 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.

If mounting under a seat, make sure there is at least 1-inch (2.5 cm) of space above the ampliﬁer’s heatsink

to permit proper cooling.

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 a 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 ***

• 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.

• 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

NOTE: Panel Layout and Controls may differ by model.

1. 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 200mV is required for proper operation. However, this input will accept levels up to 5Vrms.

2. GAIN Control

This control is used to match the input sensitivity of the ampliﬁer to the particular source unit that you are

using.

3. HIGH INPUT

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

4. BASS EQ Switch

This equalization circuit is used to enhance the low frequency response of the vehicle’s interior. Selectable for

6 or 12dB of boost centered at 40Hz, the BASS EQ can be adjusted to meet your own personal taste.

Fig.2 Panel Layout

5. LPF (Low Pass Filter) Control

This control is continuously adjustable from 50Hz through 500Hz at 12dB per octave.

6. X-OVER Switch for FULL/HPF/LPF

Activates the built in electronic crossover network. Works in conjunction with the HPF and LPF adjustable

controls.

7. HPF (High Pass Filter) Control

This control is continuously adjustable from 50Hz through 500Hz at 12dB per octave.

8. POWER/STATUS Indicator

The clear LED turns BLUE whne the power is on. Should the LED turn RED this is an indicator there is a problem

with the system in relation to the amplifer (see Troubleshooting Tips).

9. 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 solderless terminal is designed to accommodate up to 10 gauge speaker wire.

10. FUSE

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. (See speﬁciﬁcation

tables)

11. BATT+ (Power Input Connection)

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

minal of the car battery. This specially tooled solderless terminal is designed to accommodate up to 4 gauge

power wire. (see Power Cable Selection Chart for recommended wire gauge for each model)

12. REM (Remote Input Connection)

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.

13. GND (Ground Input Connection)

A good quality ground is required for your PowerBass AutoSound 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.

*** 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 ampliﬁer requires unrestricted current to deliver peak performance, so 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 might even cause the thermal protection

circuitry to shut-off the ampliﬁer. 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 etc.),

wiring harnesses, fuel pumps etc.

POWER WIRING AND SIGNAL CONNECTIONS

Fig.3 Power Input Connection

These ampliﬁers are 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!

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 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 the 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 screw driver to losen the

BATT+ and the GND connection on the ampliﬁer. Insert the ground ﬁrst, and then the +12V and please make

sure that you place them into the correctly marked terminals. Hand tighten the set screws and make sure the

connection secure to prevent possible arcing due to loose screws.

REM (Remote Trigger)

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

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

REMOTE on the ampliﬁer using a Philips (cross) type screwdriver. Insert the stripped (bare) portion of the

wire into the terminal and tighten the screw securely.

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.

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