Recent content by ctrl

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    New Magico M7 speakers

    If the measurement conditions are not specified, this information should be ignored or used only as a very rough guide. There are various standards for measurements of max SPL, max power (long term, short),... What they all have in common is that they usually suit the manufacturer very well...
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    Tekton style like tweeter array good idea?

    I do not have distortion measurements for all possible tweeters available. But for the SBAcoustics TW29TXN-B, I have magazine measurements that show that at 85dB, the tweeter exhibits less than 1% HD2 and around 0.2% HD3 at 1kHz. The mere 6dB higher SPL results from a specific configuration...
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    Tekton style like tweeter array good idea?

    Would never say that a tweeter array is an ingenious concept for the midrange. But it should work down to 800Hz. In my opinion, it would make much more sense to use a good 2'' full range driver, which allows a crossover frequency used in an 6 driver array of 300-400Hz (maybe 250Hz as 14 driver...
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    Tekton style like tweeter array good idea?

    The tweeters used for the arrays of the "high-end" Tekton speaker have roughly the following key data: fs 600Hz, xmax 0.25mm, power handling 80W with BU2@2600Hz. At 85dB SPL such a tweeter (e.g. TW29BN-B, TW29DN-B) remains below 1% HD at 1kHz. Below fs, the frequency response drops off as a...
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    Tekton style like tweeter array good idea?

    The measuring process by Stereophile is consistent, but about 6dB wrong below 300Hz. If done correctly, you can determine the low frequency range of a speaker to around +-1.5dB (my estimate, often deviation is less) via near-field measurement and subsequent merging of near-field measurement...
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    Tekton style like tweeter array good idea?

    All stereophile measurements of the overall frequency response are incorrect below 200-300Hz. When combining gated and nearfield measurements, the half-space (2pi) to full-space (4pi) transition of the nearfield measurement is not taken into account. You are probably the thousandth person to...
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    Tekton style like tweeter array good idea?

    Tekton uses SBAcoustic dome tweeter which provides several different tweeter with 10cm² Sd - see the link in the previous post or here and here. In the Tekton speaker models with "circular arrays" are 6-14 tweeter used. So dome area isn't a real problem as long as the crossover frequency is...
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    Tekton style like tweeter array good idea?

    ... the statement is IMHO not quite right. Sd for a 1'' tweeter is usually between 6-10cm². With six units, you would therefore have a summed dome area of approximately 36-60cm² - for example, 1'' tweeters from SBAcoustic and Seas. The tweeters in the "circular midrange array" are, at least as...
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    Tekton M-Lore Speaker Review

    I believe Eric has repeatedly stated in the forum and in videos that the screw holes reach airspeed Mach 1, leading to significant audible sound impairments. As you mentioned, turbulence reduces airspeed, and what Eric doesn't mention is that you would need to operate the speaker with SPL >95dB...
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    Tekton M-Lore Speaker Review

    Unfortunately, I don't have access to high-resolution impedance measurements of the Mini-Lore that could be converted. [Speculation] If you take a very close look at the on-axis frequency response of Amir's published NFS measurements, you can notice a very small increase in the frequency...
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    Tekton M-Lore Speaker Review

    I hope I understood this correctly. In Amir's and Erin's measurements, the focus is on four non-sealed holes (screw holes) in the enclosure with a diameter of 1/4'' and how strongly they have affected the measurements. @Eric Alexander, the speaker designer of the two speakers, believes that this...
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    Tekton style like tweeter array good idea?

    However, I didn't make an effort to optimize the array. If you drive the speaker actively via DSP, there are additional opportunities to optimize the radiation pattern for the circular tweeter array. Yep, I saw the diyAudio thread. My sketch above is based on that info. I just couldn't find any...
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    Tekton style like tweeter array good idea?

    The idea with the tweeter array is conceptually interesting, aside from the fact that the resonance frequency of the tweeter is hardly below 500Hz, so the lower midrange cannot be adequately served. By dividing the tweeters into groups within the array, directivity can be fairly well...
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    Tekton M-Lore Speaker Review

    Therefore, I am glad to discuss only a concept similar to what the manufacturer uses. Such freedom should be possible.
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    Tekton M-Lore Speaker Review

    This is to be expected due to the severe beaming (significant narrowing of radiation towards higher frequencies) of the two circular tweeter arrays. The manufacturer himself compares these arrays with 12'' drivers. As mentioned before, there is no information about the exact filter design. One...
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