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  1. Replies
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    so far so good. A bit more tamed than having the...

    so far so good. A bit more tamed than having the 2216ND1 do all the work. unfortunately life have been really busy and I haven't have much time to do listening and tuning. Will definitely put up more...
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    I think so. With the 2216ND1, the range is...

    I think so. With the 2216ND1, the range is limited, I didn't like the sound of the 2216ND1 when pushed up to 1kHz, and 800Hz is stressing the 2397/2241 a little. With the more capable upper range of...
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    Great. Looks like I am right on for the box...

    Great. Looks like I am right on for the box alignment.

    I think the 2216ND1 while can go up to 1kHz, it doesn't sound good up there. I look forward to hear what the 2123H can do.

    As for the 2397...
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    Hi Barry, that's a great endorsement for the...

    Hi Barry, that's a great endorsement for the 2123. I got lucky to find a pair on local CL a couple of months ago. They were brand new sealed in box, the seller (a nice gentleman) won't cutoff the...
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    oh. pardon my poor comprehension of English....

    oh. pardon my poor comprehension of English. *NOW* I think (I hope) I understand what you meant.

    Initially, I thought you meant:



    :o:
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    I had to parse that a few times.... and still...

    I had to parse that a few times.... and still hope that's not what you meant. ;)
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    what's the smallest enclosure that a 2245 will...

    what's the smallest enclosure that a 2245 will allow?
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    Regarding that, a little bit of progress has been...

    Regarding that, a little bit of progress has been made.

    I was doing some measurements and while setting up, happened to play some music with just the 2216ND1 on. And while measurements shows...
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    The data sheet says: "Because of the action of...

    The data sheet says:

    "Because of the action of the power distributors, the 2397 is notably free of high frequency beaming, and maintains its effective 140deg horizontal coverage to the highest...
  10. your wedgies piece looks great, but the...

    your wedgies piece looks great, but the understanding of how and why it works, is unfortunately a bit beyond my understanding of acoustics. :confused:
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    you have to differentiate between force and...

    you have to differentiate between force and energy. newton 3rd law says equal and opposite force, not energy. Energy is only used when something is moved by that force. Putting a 10kg block on a...
  12. My Heil have frequency peaks at 5k and 10k. After...

    My Heil have frequency peaks at 5k and 10k. After smoothing those out, they are less shouty than before.
  13. I also would classify my Heil AMT as grainy. It...

    I also would classify my Heil AMT as grainy. It is very apparent after swapping between the Heil and a Focal metal dome tweeter. Despite having even flatter frequency response the Focal is much...
  14. Or a soprano singing at the top of her lung when...

    Or a soprano singing at the top of her lung when her ran away lover came back to see her just moment before she dies.

    OMG my ears need some rest after that.

    What I noticed is that the Heil...
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    wired them "correctly" just now and did some...

    wired them "correctly" just now and did some listening. so much more focused than before.

    Overall, the sound of the Heil is a bit... not sure how to describe it, maybe "grainy"? Not clean and...
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    2 feet.

    2 feet.
  17. Back to the main topic. When I first read it,...

    Back to the main topic.

    When I first read it, I thought you meant putting stuff at the front wall. I have tried nothing (just normal drywall), 2" absorption panel, and some wooden pattern paneling...
  18. Very cool. I did try to look at what can be done....

    Very cool. I did try to look at what can be done. A while ago someone managed to do a quad stack. 4 on each side but didn't provide any measurements.

    This one looks good except it still only go...
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    110dB is crazy high. I am measuring at ~80-90dB....

    110dB is crazy high. I am measuring at ~80-90dB. My family won't talk to me anymore and that's not just because I am wearing earplugs!
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    Impulse response comparison. The wires are...

    Impulse response comparison. The wires are flipped, confirmed85737!
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    Are you saying, since it is a symmetrical dipole,...

    Are you saying, since it is a symmetrical dipole, just point it backwards? :applaud:
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    Phase measurements, comparing the 2 units. ...

    Phase measurements, comparing the 2 units.

    Here is the weird one. And I have double checked the wiring and double checked the measurement. If I wire the positive to blue, and negative to brown,...
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    Comparison of my 2 Heil AMT's. They are produced...

    Comparison of my 2 Heil AMT's. They are produced on the same day, consecutive serial numbers.

    Note the scale. They are within 2dB of each other without large deviation in overall shape.

    The...
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    Distortion. Looks quite good from 900Hz and...

    Distortion. Looks quite good from 900Hz and probably can go down to 800Hz.
    85734
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    Dispersion measurement. Not bad. By the time it...

    Dispersion measurement. Not bad. By the time it got to 50 degrees, the microphone can no longer "see" the diaphragm directly.

    85733
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