Question about Alpine SPX-17MB 300 Watts MIDBASS Speaker Car Speaker

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Bass speaker start up noise

We recently had 2 10" bass speakers installed in a Honda. Three seconds after we start the car, the bass speakers make a loud noise prior to the radio starting. At that point the bass speakers play fine. What is the problem?

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  • anne845 May 11, 2009

    Thank you! We will certainly look into this and see if this solves the problem. I'm glad to know it will not harm the speakers. It IS VERY irritating. I almost have a heart attack when I am in the car when it occurs. Luckily, it is my daughter's car and I rarely ride in it. I do want to try and get it fixed though. Thanks again!

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Hello anne845,

It sounds like the installer wired the amp remote turn-on terminal to an "accessory" lead in your vehicle. Many stock radios do not have a dedicated amp turn-or lead and the alternative is to connect the amp to a switched power source (ignition or accessory). This means the amp turns on whenever you turn on the vehicle ignition, often resulting in a thumping from the subs. It is a perfectly satisfactory alternative, and will not damage either the amp or the sub. But it's irritating.

If the thumping is objectionable, have your installer wire a SPST (Single Pole, Single Throw) toggle switch inline with the turn-on wire. The switch should be mounted so it is accessible by the driver, and whenever you turn on the radio, turn on the toggle switch.

Hope this helps.

Posted on May 11, 2009

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