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    Is the 80-90db at 1m?

    Is the 80-90db at 1m?
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    Duly noted - I'll take additional measurements at...

    Duly noted - I'll take additional measurements at 90db and will show 2nd, 3rd, and 5th.
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    Few Measurements

    Took few measurements this evening:

    (1) Sample 1 vs Sample 2 - Frequency Response
    (2) Sample 1 - Distortion (2.83v at terminal - mic 20in from driver)
    (2) Sample 2 - Distortion (2.83v at...
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    Thank You! - I look forward do it.

    Thank You! - I look forward do it.
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    You are right. I'm in the process of building a...

    You are right. I'm in the process of building a bass cabinet to go along with these. I'll see how difficult it would be to get them to match (moreorless) via the crossover.
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    Need Measurements

    Hi All,

    Can someone please post raw measurements of the AMT drivers? Both Left and Right - just the AMTs.

    I just measured my pair and there is about 3-4 db in overall variance, with one...
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    I don't think I will use a protection cap. They...

    I don't think I will use a protection cap. They can be safely played down to 800hz with a second-order crossover <- that makes them pretty robust in my book. Plus given their efficiency, I plan on...
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    The Heils have arrived!

    Per UPS tracking, the Heils have arrived. I plan on taking measurements later today/tomorrow.

    Wanted to know if people are using a protection cap (e.g. 50uF or 80uF) in series for measurement...
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    Thanks, Earl! That is pretty impressive range...

    Thanks, Earl!

    That is pretty impressive range (500hz - 20Khz). May not be untrue that it can be crossed as low as 800hz. Mine will not be shipped now until tomorrow; thus, I don't expect to have...
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    Rob - I believe that design was from early 2011. ...

    Rob - I believe that design was from early 2011.

    I really doubt my driver measurements will match Dennis's.

    I must say you got your hands on a pretty decent pair. While there may be response...
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    Gate Measurement

    Jmpsmash,

    Have you tried gating your measurements? Your measurements seem to include the room response.

    You can look at the Impluse Response to see when the first reflection arises, and then...
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    I just ordered a pair

    I just ordered a pair. I will try Dennis's crossover, but before I do, I want to make sure my raw measurements are consistent with his raw measurements.

    For those at that are curious, see...
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