Small sealed sub using Parts Express drivers

Discussion in 'Home Theater Projects' started by Bhavesh, Jan 6, 2005.

  1. Bhavesh

    Bhavesh Stunt Coordinator

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    Hi all,
    a friend of mine on campus is looking to DIY a small sealed sub.

    He currently has a NAD 7020e which he was considering using, failing which he would buy a bigger amp.
    Specs:
    POWER AMP SECTION
    Continuous output power into 8 ohms 20W (13dBW)
    Rated distortion (THD 20Hz - 20kHz) 0.03%
    Clipping power (maximum continuous power per channel) 25W
    IHF Dynamic headroom at 8 ohms +2.5dB
    IHF dynamic power (maximum short term power per channel)
    8 ohms 35W (15.5dBW)
    4 ohms 35W (15.5dBW)
    2 ohms 50W (17dBW)
    Considering its rated down to 2 ohms, could he even try bridging it?

    Which PE drivers would you recommend?
    Currently he's considering the DAYTON 10" TITANIC MKII in the Q = 0.6; 1 cubic ft enclosure. Its on special for $99.87
     
  2. ThomasW

    ThomasW Cinematographer

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    For that price its's a good driver. Note that it's really closer to an 11" driver than a 10".

    His enclosure is too small, and his amp is way too small.

    I doubt that the receiver is designed to be run bridged, and even could be it wouldn't have enough power.
     
  3. ColinM

    ColinM Cinematographer

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    The Titanic's sensitivity = 90db. Add the 13dbw the NAD provides and theroetically you can expect a max of 103db average spl. If he does go this route, be sure to keep the soft clipping engaged.

    This should work OK, just with limited max SPL capability. Like a 1.3L 3 banger in a corvette. Works, but later be sure to add a proper amp.
     
  4. Jack Gilvey

    Jack Gilvey Producer

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    I've always found the "sensitivity" spec on a sub driver pretty meaningless. Stick it in a tiny box, and the low bass sensitivity plummets.
     
  5. john michiels

    john michiels Auditioning

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    I bought an infinity 12" car sub (120se?)for 120 bucks, built the 1 cubic foot sealed box infinity specified and power it with a Parts Express 250 watt plate Amp for $125 and it's quite nice.
    It may not be extremely efficient but who cares. With 272 watts it cranks when the action dictates chest thumping explosions and yet goes very low with very tight defined bass when a stand up bass is bowed in a string arrangement.
    I'm into the music more than video and I'm very pleased.
     
  6. Jason Hammerly

    Jason Hammerly Supporting Actor

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    I kind of did the same thing John. Had an old Infanity Kappa 12" sub and did the 54 liter sealed plan from Adire and added a 150 watt plate amp and my father in law loves it. Does a pretty nice job in his big room. I'm surprised.
     

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