Recent content by pinox67

  1. pinox67

    REW Beta Release Import Frequency Response issues

    Thank John. Well, if you use for vertical scale dBFS or dBr, the level is set instead at 3dB: If I generate the min phase, from SLP & Phase view, with setting like yours: Add LF tail: Start: 20 Hz, Slope: 0.0 Add HF tail: Start: 80KHz, Slope: -12 dB/octave Apply freq. warping to HF tail...
  2. pinox67

    REW Beta Release Import Frequency Response issues

    Testing my signal processing programs, sometimes I produce a csv file containing the Frequency Response of a filter and then I import it REW with "Import frequency response" item. Below there is a simple low pass Butterworth filter at 1KHz, 2nd order (formatting with tab separator is lost in the...
  3. pinox67

    Resistive Load for Amp Testing

    I had a (small) dummy load built. Simplifying, the circuit is composed of 4 resistors of 8ohm 200W for each channel, which can be paralleled progressively with input, creating loads of 8, 4, 2.6 and 2 ohm. So, on 2 ohm it can reach up to 800W. The input connection from the amplifier is always...
  4. pinox67

    Symmetrically placed subs not measuring the same?

    From pictures, I see that the door is in a side and open or closed, it is not in a symmetric position respect to subs emission, in the front wall. This is sufficient to cause some differences in their response. If you cover the door and its symmetric position in other side with a heavy curtain...
  5. pinox67

    Symmetrically placed subs not measuring the same?

    For a perfect symmetry in measures all shall be symmetrical: room, subs type and setting, placement and any furniture. Also a door or a window not in symmetric positions can cause differences. However you should also measure the sum of two subs to see what you ear in a normal listening...
  6. pinox67

    REW First Measurement

    Dips and peaks in low frequency bands are mainly due to room resonance modes, that can be more or less excited by louspeakers position. A big contribute is due to the reflection of sound from loudspeakers with the near front wall and corners. Moving loudspeaker can help yes, but I think it would...
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