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sealed box

Discussion in 'Amps and Cabs [BG]' started by jsa0100, Apr 7, 2005.


  1. jsa0100

    jsa0100

    Apr 6, 2005
    Norway
    Has anyone tried a sealed box bass system ?

    I tried to connect to a 12" HIFI sub (THX) with
    an aluminium woofer.
    never heard such tight bass !
    And still, pleasent and soft.
    almost unreal.

    Any drawback ? :
    The cabinet has a SPL at 87 db. at 1 Watt.
    so it need much power, even at smaller gigs.
    Could ad more of this , but the cost would be
    very hi.
     
  2. billfitzmaurice

    billfitzmaurice Commercial User

    Sep 15, 2004
    New Hampshire
    Owner, Bill Fitzmaurice Loudspeaker Design
    What you heard was a low sensitivity high fidelity speaker, as opposed to a high sensitivity low-fidelity speaker that you're used to. The fact that it was sealed in and of itself isn't necessarily pertinent.
     
  3. jsa0100

    jsa0100

    Apr 6, 2005
    Norway
    I know this is a HIFI system, and to compare
    it with a high SPL bass speaker system is perhaps
    unfairly. (and perhaps a bitt funny :meh: )

    I haven't tried that many bass speakers.
    (used to play guitar)
    Even so, compared to common 2 x 10" and 4 x 10"
    and some 15"
    systems, i still got the feeling that more could be done
    to controll the impulse response of the low end.

    seald boxes doesn't have to be the reason why the bass
    is so clear. I have built several subwoofers for
    cars, and there is a distince difference between the two
    systems:

    Advantages of sealed enclosures:

    Smaller enclosures (not always)
    Linear (Flat) response
    No port noise
    High power handling
    Excellent sound quality
    A well buildt seald box, can have a very tight an unsaturated
    sound (almost like a servo system), i just was taken by how good it could sound for a 5 s. bass.

    But i suppose the lower SPL is an disadvantage ?
     
  4. billfitzmaurice

    billfitzmaurice Commercial User

    Sep 15, 2004
    New Hampshire
    Owner, Bill Fitzmaurice Loudspeaker Design
    The lower SPL is a definete disadvantage if you're trying to put out 115dB from an 85dB sensitive speaker, which is why they don't use 85dB sensitive speakers for live sound. The argument over ported versus sealed will likely rage on forever, but in both hi-fi and pro-sound vented designs outnumber sealed by about a 3:1 ratio, so that should tell you something.
     
  5. fdeck

    fdeck Supporting Member Commercial User

    Mar 20, 2004
    Madison WI
    HPF Technology LLC
    I'll tell you in a few days. My sealed box is all put together, varnished, and ready for me to drill the holes for the driver bolt circle.