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Miniature Stereo Amplifier Not Functioning (again) 2016-09-24T18:07:11+00:00

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Viewing 12 posts - 1 through 12 (of 12 total)
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  • Dudeguy21
    September 24, 2016 at 6:07 pm
    Post count: 0
    #9284 Reply |

    I purchased a DROK®Ultra Small Hi-Fi 10W+10W Dual Digital Audio Amplify Board Stereo AMP DC7.5-15V 12V 8Ω 20mA 2 Channels PC Class-D Power Amplifier Module for Car Vehicle Auto Audio System Bookcase Speaker recently, and it has not been functioning correctly.

    I actually posted here earlier about the same chip, but I have fixed that issue. When the chip gets at above ~1/3 volume, the speaker makes a popping sound, and the volume stops playing. It then starts increasing gradually until it pops again, and repeats the process repeatedly. It has only started doing this recently. I have tried it with multiple devices, each had the same result.

    I created a short audio sample as an example of the sound produced. Thanks for your assistance,

    -Dudeguy21

    Dudeguy21
    September 24, 2016 at 6:08 pm
    Post count: 0
    #9285 Reply |

    I forgot to post the link to the sound. Oops!

    Drok
    Keymaster
    September 25, 2016 at 2:44 am
    Post count: 2971
    #9298 Reply |

    Hello Dudeguy21,
    Thank you for writing in.
    Could you please tell us more details of your operation, such as the input voltage/current, the wiring, the working environment?
    If you can, we sincerely hope that you can send us some images of your wiring and the working environment to let us check the problem details.
    With your help, we can find a solution more quickly.
    Looking forward to hearing from you.
    Best regards

    Dudeguy21
    September 25, 2016 at 7:05 pm
    Post count: 0
    #9314 Reply |

    For power, I am using the ac to dc converter I purchased from Drok (12v DC), and the audio output is being sent to two Magnavox speakers (input 5w, impendance 8 ohms). I am using an 3.5mm aux cord for audio input.

    I created an Imgur Gallery with pictures of the setup in case you needed them.

    Drok
    Keymaster
    September 28, 2016 at 3:16 am
    Post count: 2971
    #9397 Reply |

    Hello Dudeguy21,
    Sorry for our late reply.
    Could you please tell us the current of your power supply?
    This problem may be caused by that the current of the power supply is too low and the power is not enough to drive the amplifier when the volume is turned up.
    Could you please try to use another power supply with larger current to check if the amplifier work normally?
    If not, please feel free to write back to us.
    Best regards

    Dudeguy21
    September 28, 2016 at 12:08 pm
    Post count: 0
    #9402 Reply |

    Unfortunately, I don’t own a power supply above 12v that is compatible with the port on the amplifier, so I cannot test this.

    Drok
    Keymaster
    September 29, 2016 at 2:33 am
    Post count: 2971
    #9416 Reply |

    Hello Dudeguy21,
    You can use other power supply which the voltage range is DC 7.5-15V and the current is more than 3A.
    Best regards

    Dudeguy21
    September 30, 2016 at 12:53 am
    Post count: 0
    #9436 Reply |

    After digging around in my basement, I did not find a power supply that would fit in the socket of the amplifier.

    Are you suggesting that the power supply is defective? Or is it simply not the proper voltage and amperage for the amplifier?

    Drok
    Keymaster
    September 30, 2016 at 2:18 am
    Post count: 2971
    #9440 Reply |

    Hello Dudeguy21,
    We do not mean that the power supply is defective.
    The problem maybe caused by the output power and current of the power supply cannot feed the amplifier when it turn up to high volume.
    So we want you to use other power supply with larger power and current to check if the amplifier work normally.
    Best regards

    Dudeguy21
    September 30, 2016 at 11:52 am
    Post count: 0
    #9464 Reply |

    Unfortunately, as stated earlier, I do not have a larger power supply that is compatible with socket on the amplifier.

    Dudeguy21
    October 4, 2016 at 11:21 pm
    Post count: 0
    #9527 Reply |

    What are my options? Am I able to return this item? If this a problem with the amplifier, could I get a replacement?

    Drok
    Keymaster
    October 8, 2016 at 7:12 am
    Post count: 2971
    #9602 Reply |

    Hello Dudeguy21,
    Thank you for your reply.
    Could you please tell us your order ID, so that we can contact you and find a solution to you via Amazon?
    Waiting for your reply.
    Best regards

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