Question about Bazooka ELA300.1 Car Audio Amplifier

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My Bazooka ELA300.1 amp was working great and it just randomly shut off. No lights are on at all. It just won't turn on. All the connections appear to be attached and all the fuses are intact. What do I do?

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Posted on Jan 02, 2017

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SOURCE: No idea!!

Have you checked the on-board fuses on the amp?

Have you confirmed, with a multimeter, that you have B+ and remote voltage AND a good ground? If not, do the following.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

Posted on Sep 29, 2008

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1 Answer

How to i find out whats wrong with my bazooka tube i tried to hook it up to a car battery and car stereo out side but wont work ???


follow this steps and fix it. GOd bless you

  • Verify that the amplifier is turning on by looking to see that it is lit up.

  • 2
    Use a voltmeter to verify your power supply is a good 12 volts by touching the ground lead to you amplifier's ground screw and the positive one to the amplifier's constant power supply screw. Also verify that you have 12 volts coming from the remote lead wire which is usually a thin blue wire between the ground and constant 12 volt supply.

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    Look for the "thermal overload" light. It is usually a red LED on the side of the amp. If the amp feels really warm and this light is lit, the amp has probably overheated from being tuned wrong or turned up too loud and shut itself down to cool off.

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    Check the fuses on the amplifier. These can blow with extended use or during heavy bursts of use.

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    Make sure the "Gain" and other volume controls are turned up.

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    Confirm that the signal wire is still attached to the amplifier and has not come disconnected by vibrations in the car. Also check that the wires running out of the amp to the speakers are still attached to the amp.

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You may be over driving the speakers or there may be an impedance mismatch between the amplifier and speakers, especially if they are connected in parallel

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The amp needs a remote signal to turn on. This is provided by wire from the back of your head unit. Also look for a 'REM' or 'remote' connection on the amp (besides the 12v and ground connection).

Look at the wiring/setup diagram for your head unit to determine which wire/connection you should use for this.

If the head unit does not have a specific 'remote' wire, you can usually use the power antenna wire to provide a turn on signal to the amp instead.

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It appears that there may be an open trace inside the amp. This assumes that the ground connection between the amplifier and the vehicle is intact.

Don't allow the RCAs to contact anything other than the RCA jacks of the amp. Some head units are easily damaged when the RCA shield contacts a power source.

The amplifier will need to be repaired. It's a simple repair and shouldn't be expensive.

Let me know if you have any other questions.

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That's a new one on me.
The only electrical difference is the battery voltage on ACC is 12 volts. When you start the truck the alternator should put out about 13.7 volts. That would make me suspect a bad power supply in the amp or the output transistors, something in the amp is getting hot at the higher voltage and shutting it down

That would explain why you get two minutes ,and than when you turn the truck off the voltage drops back to 12 volts and the amp comes out of protect mode. Try a amp swap or if it's a self amplified tube, hook it up to a friends system.

Never hurts to put a voltmeter on the battery with the truck running, and off, to make sure the alternators voltage regulator
is not faulty and exceeding the rated voltage.
Good luck, let me know what happens, I'll ad it to the book.
Regards Paul

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THEY MIGHT BE DRAWING MORE CURRENT THEN UR ALTERNATOR CAN HANDLE.TRY CONNECTING A CAPACITOR FOR THE SUBS.

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