Power question.

Discussion in 'Archived Threads 2001-2004' started by Jedd, Mar 13, 2002.

  1. Jedd

    Jedd Second Unit

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    What it makes to be very efficient and use as little watts as possible?

    I.e. is is possible to design a good sub which will be satisfied with 75W from my receiver?
     
  2. Sure you can=)

    Hoffman's Iron Law: enclosure volume, extension, efficiency. Choose two and your stuck with the third.

    Since a sub requires extension and you require efficiency, you can have it at the expense of having a large box.

    heck, I believe Brian Owens was driving his BPD1803 with only 25watts and the whole house was rattling. ...course it was a 12ft^3 ported enclosure
     
  3. Jedd

    Jedd Second Unit

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    Is there any king of formula for this?

    How many ft^3 do I need to drive ported Tempest with 75Watts? Can I have good timing values with it?
     
  4. Jack Gilvey

    Jack Gilvey Producer

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    Have you downloaded the LspCAD demo from Adire yet? "Salvation lies within".
     
  5. Rudy H

    Rudy H Stunt Coordinator

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    Listen to Jack.

    Also note that the larger the larger the vented box, the worse (usually) the transient response.

    Me? I like Low Q (AKA; Big!) sealed boxes.

    What are you goals for your sub?

    Do you want it loud? How loud?

    Clean/tight?

    How much power will you have?

    How much do you wanna spend?

    There's a lot of questions to be answered.

    And you can power any sub with even 1 watt, doesn't mean you'll get much SPL though.
     
  6. Jedd

    Jedd Second Unit

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    Well, I downloaded it with some designs from Adire, too much terms for me right now inside, so I started to ask here. (what is "transient response" by the way?)

    Goals : Music/HT 60/40

    Loud: Yes, loud

    How Loud?: I don't want to ruin my house, but I want to be capable...

    Clean/tight: sure

    How much power will you have: that's what I'm trying to decide - I have free 75W channel from my H/K 520 I can use for powering. 7^3 ft is the biggest tube volume I can aford.(from the other hand big round table can go up to 10^3) If it's not enough, I'll buy plate amp then and go with sealed box design.

    How much do you wanna spend: I hope to stay under $500 for everything (I don't have any tools or materials right now)
     

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