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Queries on Bass Box

Discussion in 'General Electronics' started by Jean, Jan 18, 2004.

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  1. Jean

    Jean Guest

    Hi everyone

    I have several doubts regarding subwoofer and its amplifier

    -1- What is the basic difference(in construction,working and
    performance) between a subwoofer and an ordinary woofer ?

    -2- When was sub woofer first introduced ?(And who introduced it ?)

    -3- How can I detect a distorted output from a subwoofer ?

    -4- What are the specifications of the box on which the sub is to be
    mounted ?

    -5- Is the shape of the box significant ? Or is that the volume of the
    box that matter ?

    -6- I have bought a subwoofer named 'DAINTY'.On the sub the following
    are written...8 Ohm,130W RMS,260W MAX .Have you ever heard a company
    like that ? Or is it a local make ?

    -7- Will an amplifier constructed with a TDA 7294 work ?

    -8-What should be the power rating (I expect VA,RMS output voltage,RMS
    output current) of the transformer to be used for maximum power output

    -8- What are the rating of the rectifier diodes and the filter
    capacitor to be used for the dual DC power supply ?

    Thanks in advance

  2. Gary Lecomte

    Gary Lecomte Guest

    I am not an expert in cabinet design, But here is what I know:

    1) A Subwoofer is mainly a "Center channel" woofer to reproduce lower
    and more powerful bass than a normal woofer.

    2) No Idea!

    3) All Speakers produce distortion. You need quite soficated equipment
    to determine distortion coming fro the speaker, but if it sound good,
    who cares.

    4) Each Speaker requires a Specific Design, based on the speakers
    parameters. The specifications you list do not give enough info. Ask
    that manufacturer for all the spec, than find a speaker cabinet design
    program. Or ask them for their recommended cabinet design for that
    specific speaker.

    5) BOTH!

    6) Never head of them.

    7) Not very suitable for a Sub Woofer. Not Enough Power!

    8) I would recommend at least 100 watts RMS of real power. Not some of
    these phony RMS Specifications that some manufacturers use today. Even
    the wattage specs on your speaker sound a bit outragous!

    9) This Totally depends on what it is being used for, the voltage
    levels and the currents required. Without that info, no one can answer

    Take care........Gary
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