PowerBass ATM 330.2 Owner's Manual
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PowerBass ATM 330.2 Owner's Manual

Atm compact class a/b amplifier
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ATM 330.2
ATM 440.2
ATM 550.4
ATM 660.4
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.

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Summary of Contents for PowerBass ATM 330.2

  • Page 1: Owners Manual

    ATM 550.4 ATM 660.4 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.
  • Page 2 In the interest of safety, PowerBass USA highly recommends listening at lower volume...

  • Page 3: Technical Features

    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.

  • Page 4: Installation Precautions

    MOUNTING THE AMPLIFIER Fig.1 Mounting Amplifier 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.

  • Page 5: Mounting Location

    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.

  • Page 6: Control Panel Layout

    CONTROL PANEL LAYOUT Fig.2 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.
  • Page 7 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.
  • Page 8 “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.

  • Page 9: Power Wiring

    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.
  • Page 10 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.
  • Page 11 RCA INTERCONNECT WIRING Fig.4 Low Level Input using RCA 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 provides better noise rejection.
  • Page 12 HIGH LEVEL CONNECTIONS (Optional) High Level inputs have been included to connect the amplifier to a radio without low-level outputs (i.e. factory radio). This plug-in terminal will allow you to connect directly to the speaker output of the radio without the need of an external adapter.
  • Page 13 FOUR CHANNEL CONNECTIONS: FLOATING GROUND RADIO (MOST POPULAR TYPE) FOUR CHANNEL CONNECTIONS: COMMON GROUND RADIO (RARE TYPE)

  • Page 14: Set-Up Adjustments

    SET UP ADJUSTMENTS Input Gain Adjustment GAIN Input Sensitivity Control Fig.5 GAIN Control 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 three simple steps: Set the volume of GAIN on the amplifier to Min (completely counter clock wise).
  • Page 15 SPEAKER WIRING AND CONFIGURATIONS Speaker Load Keep in mind your PowerBass Autosound amplifier is a high power amplifier and not a high current amplifier. In other words this amplifier requires a minimum impedance of 2 ohms STEREO and 4 ohms bridged MONO to operate trouble free.
  • Page 16 Speaker Output Connections 2 Channel Models ( ATM-330.2 & ATM-440.2) 2-Channel Speaker Output Connection Fig.11 2-CH Speaker Connection (Do not connect total impedance under 2 ohms) 1-Channel (Bridged Mode) Speaker Output Connection Fig.12 1-CH (Bridged Mode) Speaker Connection (Do not connect total impedance under 4 ohms) CAUTION! When bridging the speaker outputs, the amplifier must see a 4 ohm load or higher.
  • Page 17 Speaker Output Connections 4 Channel Models ( ATM-550.4 & ATM-660.4) 4-Channel Speaker Output Connection Fig.13 4-CH Speaker Connection (Do not connect total impedance under 2 ohms)
  • Page 18 3-Channel Stereo/Mono Speaker Output Connection Fig.14 3-CH Speaker Connection (CH 3 & 4 are Bridged as shown) CAUTION! When bridging the speaker outputs, the amplifier must see a 4 ohm load or higher. Below 4-ohms will cause internal damage to the amplifier. 2-Channel (Bridged Mode) Speaker Output Connection Fig.15 2-CH Speaker Connection (Do not connect total impedance under 4 ohms)

  • Page 19: Recommended Wire Sizes

    Miscellaneous: ______________________________________________________ This manual is the exclusive property of PowerBass USA, Inc. Any reproduction of this manual, or use other than its intentions is strictly prohibited without the express consent of PowerBass USA, Inc. © Copyright 2010 PowerBass USA, Inc.

  • Page 20: Troubleshooting Tips

    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 ampli- fier. Contact PowerBass USA or your local dealer.
  • Page 21 SPECIFICATIONS FOR AUTOSOUND COMPACT A/B AMPLIFIERS Two Channel Models ATM 330.2 ATM 440.2 Power Output @ 14.4 VDC Input 4 Ohms Power (Watts) 75 x 2 100 x 2 2 Ohms Power (Watts) 150 x 2 200 x 2 4 Ohms Mono Power (Watts)
  • Page 23 Some states do not allow limitations on the length of an implied warranty, so this limitation may not apply. No person is authorized to assume for PowerBass any other liability in connection with the sale of this product.
  • Page 24 PowerBass Autosound – A division of PowerBass USA, Inc. 13936 Mountain Avenue – Chino, CA 91710 Tel. (909) 993-5399 – Fax (909) 993-5393 www.powerbassusa.com...

This manual is also suitable for:

Atm 440.2Atm 550.4Atm 660.4

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