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    The internal dimension is 22.5x19x30.5. which...

    The internal dimension is 22.5x19x30.5. which bring it to 7.5 cu ft gross. net is approx 6.5 cu ft given all the bracing and the driver/port.
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    despite still some stuff to be done before I can...

    despite still some stuff to be done before I can call the speakers done (or will it ever be "done"? :) ) , the speakers are very very listenable and very enjoyable. great sound stage, great texture,...
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    any reason why? I have opened up a pair of...

    any reason why?

    I have opened up a pair of former pretty top end speakers from a certain famous French speaker manufacturer and that's what they have inside.
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    nice! what's happening at the last photo?

    nice!

    what's happening at the last photo?
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    do you just use the fiber glass insulation from...

    do you just use the fiber glass insulation from the hardware store? is there a risk of the fiber getting airborne with all the vibration? The acoustic panel people are talking about how they are...
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    second on Baltic Birch Plywood. You cannot find...

    second on Baltic Birch Plywood. You cannot find those in the generic big box hardware store. Instead I found good quality one from lumber store. Highly recommend 1" (actually, 24mm).
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    Do you just use the stuff from hardware store?...

    Do you just use the stuff from hardware store? Are you concerned about the fibers getting into the air with all the vibration?
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    Dr.db & Mr.Widget, those are some serious...

    Dr.db & Mr.Widget,

    those are some serious bracing you guys have done. And now that I have mine built, I understand why! In mine, I have mostly done bracing on each of the surface, sides and back...
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    Response at my listening position, with the...

    Response at my listening position, with the speaker tuned to flat at the ear. There is a pretty big suck out below 50Hz and then recovers after 30Hz. I tried to simulate it in REW room sim and it...
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    with a cabinet this large, is it realistic for it...

    with a cabinet this large, is it realistic for it to be completely inert when the driver is pumped way high in volume? from touch alone, mine is not, there is some vibration, but at the same time, it...
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    I will do so and now that I have two woofers I...

    I will do so and now that I have two woofers I will spend my time getting the 2397/2216ND-1 match better. I was having fun and really pumped up the bass and the 2216ND-1 handled it with ease.
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    :D I think part of it is that they are now...

    :D

    I think part of it is that they are now driven by the same amp and DAC. So there isn't a mismatch in sound between the drivers.

    the upside is that one fewer DAC/Amp cost less money.

    the...
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    In the interim, I was trying out different...

    In the interim, I was trying out different configurations to match the 2441/2397 and the Fostex. trying out different amps, crossover points, active/passive, placements.

    At the end I still like...
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    And finally, the replacement 2216ND1 arrived and...

    And finally, the replacement 2216ND1 arrived and it works! A month after I ordered. Installed it and turning it up it is capable of some well defined thundering bass that shakes the room. Now I need...
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    some measurement and simulation definitely prove...

    some measurement and simulation definitely prove what Ian says. top is the measurement, and the bottom is the room simulation from REW.

    having the actual simulation plus the near field measurement...
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    Thanks. that's great advise.

    Thanks. that's great advise.
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    I spent some time playing around with the amps...

    I spent some time playing around with the amps and looking at the distortion.

    I ended up swapping out the NC400 and swapped in a single ended tube amp to drive the 2441 and another to separately...
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    did some nearfield measurement of the 2216ND-1...

    did some nearfield measurement of the 2216ND-1 and the port.

    near field seems to be close to simulated.

    the other 2 are the combined at 2 feet and 3 feet.

    time to work on the placement and...
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    I am ... *gulp*. very curious too. :D

    I am ... *gulp*. very curious too. :D
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    Yuichi horns. every day I wake up and check this...

    Yuichi horns. every day I wake up and check this forum, I end up going more googling learning about new things. :D

    Yuichi horns looks very interesting. also very involved construction. Maybe for...
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    I tried stuffing some acoustic eggcrate foam into...

    I tried stuffing some acoustic eggcrate foam into the side cells and seems to tighten the image a little. Putting extra aborption panel on the side and front walls also help. I can get a better image...
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    with all due respects. I am not putting that...

    with all due respects. I am not putting that thing any where near my speakers... :eek::eek::eek:
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    Shame to say, I don't have a driveway or anywhere...

    Shame to say, I don't have a driveway or anywhere close to having open space in the near vicinity of my house that won't lead to me (and more importantly my newly built speaker) getting run over by a...
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    Is the imaging going to improve with the side...

    Is the imaging going to improve with the side cells blocked up? Something to test out.



    After going through the process of building, measuring and listening I am learning a lot!
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    this is also the 2441 that was giving me issue: ...

    this is also the 2441 that was giving me issue:

    http://www.audioheritage.org/vbulletin/showthread.php?41885-2441-clipping-distorted-sound

    I will try to swap in the other one and see. Maybe my...
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