Recent content by sm52

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    Your Thoughts: Phase drifts in 2CH system as Freq increases

    Earlier you wrote that after changing the right and left sides between each other, the problem moved to the right side. If the speaker wires remained in place, then they have nothing to do with it. And the reason will be inside the left speaker.
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    REW Beta Release REW API beta releases

    John Mulcahy, phofman, thanks for the explanation.
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    REW Beta Release REW API beta releases

    Could you provide a link to read how this happens?
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    Your Thoughts: Phase drifts in 2CH system as Freq increases

    This is right. First one channel, then the second. Two channels are only sometimes measured at the same time, for example to evaluate how the right and left influence each other. But the same thing can be done by having measurements of each channel separately and using arithmetic in REW. At this...
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    Your Thoughts: Phase drifts in 2CH system as Freq increases

    If you place the microphone exactly between the right and left speakers, the phase response on each channel at the end of the frequency range should move around zero degrees. This may start at 10kHz, or 2kHz, or some other frequency. Your measurements are not synchronized, so it is not...
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    Your Thoughts: Phase drifts in 2CH system as Freq increases

    You have reversed the polarity of the entire left speaker. I looked at what happened. This is not the right decision. It is necessary to return the polarity of the left speaker as it was before. Moreover, the tweeter of the left speaker does not need to be inverted either. It sounds like you're...
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    Your Thoughts: Phase drifts in 2CH system as Freq increases

    If you keep in mind the location of the speakers as when measuring, try changing the polarity on the left speaker. Possibly only on the tweeter, but maybe on the left speaker input. I also see a big hole from 240 to 500 hertz. This is also significant.
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    Can I do more for my 2.1 system?

    Not good. Although the main speakers can be left like that for now. Raise the subwoofer level by 5 dB and try making a filter cutoff for it at 90 Hz 24 dB/oct. I tried to determine the correct delays for the speakers by taking the measurements from post 17, and considering that the second...
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    Can I do more for my 2.1 system?

    I wrote about using the first big peak of a sub on the impulse graph to set the delay for the sub. More precisely, negative delay. Because in fact, the sub always needs to be done earlier. Or delay the main speakers. Looking at the last picture, you should try to make the cutoff frequency for...
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    Can I do more for my 2.1 system?

    I will not evaluate other people's recommendations. I expected you to take a few measurements without adjustments, then with some adjustments, I'll see how best to match the three speakers. If the result suits you, the job will be done.
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    Can I do more for my 2.1 system?

    Next, you need to align the impulses of the main speakers. If you measure them from the center point between them, they will already be aligned. In previous measurements, the main speaker graphs started at 35 hertz. Required from 0 hertz. To see at what frequency to cut the filter to match the...
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    Can I do more for my 2.1 system?

    This means the equipment is normal. Glad to hear that. Take three measurements, with the left channel as reference, for three speakers. For best results, make the full frequency range 0-24 kHz. Including for the sub. With delays and filters disabled. Place the microphone at the same distance...
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    Can I do more for my 2.1 system?

    Try excluding miniDSP from the playback chain. Connect your computer to an external sound card or external DAC, then to a power amplifier, then to the left main speaker. Check what the impulse looks like in this case.
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    Can I do more for my 2.1 system?

    Try disabling the 'Play dither before sweep' option in the measurement window. After starting the measurement for the left speaker (output L, ref output L), move close to the right speaker to hear if it play the sweep while measuring the left speaker.
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