EQ'd subs how to include speakers?

Discussion in 'Archived Threads 2001-2004' started by Richard_M, Feb 18, 2003.

  1. Richard_M

    Richard_M Second Unit

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    After much reading on this forum, I have finally gone with some recommended testing equipment.

    In the past I have used a Radio Shack spl meter, cd, and Excel spreadsheet.

    I have invested in a Behringer ECM8000 mic and preamp, I also got the cal file for this mic from Trueaudio. I used EFT5 for testing. I realise these mics are supposed to be good to 15Hz, but I included the 10Hz results as well.

    I tested & eq'd my 2X M&K V125 subs which are situated next to each of my main speakers, and these are on one channel of my bfd eq. I then tested & eq'd my 1X M&K 5000 which is approx 2mtr behind me slightly out from the corner facing left to right i.e at right angles to the front subs. This is on the second channel of the bfd.

    Listed are the results of all 3subs at once.

    Freq dB
    10.2589.13
    10.9990.14
    11.7291.09
    12.4592.06
    13.1893.05
    13.9294.06
    14.6595.08
    15.3896.07
    16.1196.99
    16.8597.82
    17.5898.50
    18.3199.03
    19.0499.36
    19.7899.52
    20.5199.50
    21.2499.34
    21.9799.10
    22.7198.83
    23.4498.59
    24.1798.46
    24.9098.45
    25.6398.58
    26.3798.80
    27.1099.07
    27.8399.32
    28.5699.53
    29.3099.67
    30.0399.75
    30.7699.78
    31.4999.79
    32.2399.80
    32.9699.83
    33.6999.87
    34.4299.92
    35.1699.97
    35.89100.00
    36.6299.99
    37.3599.93
    38.0999.82
    38.8299.67
    39.5599.51
    40.2899.35
    41.0299.21
    41.7599.12
    42.4899.08
    43.2199.08
    43.9599.10
    44.6899.14
    45.4199.17
    46.1499.20
    46.8899.22
    47.6199.24
    48.3499.26
    49.0799.29
    49.8099.32
    50.5499.36
    51.2799.38
    52.0099.38
    52.7399.34
    53.4799.24
    54.2099.09
    54.9398.87
    55.6698.59
    56.4098.25
    57.1397.85
    57.8697.40
    58.5996.92
    59.3396.43
    60.0695.92
    60.7995.44
    61.5294.97
    62.2694.55
    62.9994.17
    63.7293.86
    64.4593.63
    65.1993.51
    65.9293.50
    66.6593.63
    67.3893.90
    68.1294.31
    68.8594.81
    69.5895.37
    70.3195.95
    71.0496.49
    71.7896.98
    72.5197.39
    73.2497.71
    73.9797.94
    74.7198.07
    75.4498.11
    76.1798.09
    76.9098.00
    77.6497.89
    78.3797.78
    79.1097.68
    79.8397.61
    80.5797.58
    81.3097.57
    82.0397.58
    82.7697.58
    83.5097.57
    84.2397.51
    84.9697.41
    85.6997.27
    86.4397.07
    87.1696.82
    87.8996.54
    88.6296.23
    89.3695.90
    90.0995.57
    90.8295.26
    91.5594.98
    92.2994.77
    93.0294.64
    93.7594.57
    94.4894.58
    95.2194.61
    95.9594.66
    96.6894.67
    97.4194.62
    98.1494.50
    98.8894.29
    99.6193.98
    100.3493.58

    Now the question is these results are only having the subs connected directly to the computer via the bfd, so how do I test the system including my amp & main speakers?

    Do I connect a Y adaptor to left & right tape in, and test the subs?. I don't want to blow anything up!!!

    Thanks for any input!

    Richard
     
  2. Wayne A. Pflughaupt

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    All you need to do is split the LFE output of your receiver with a “y” adapter. This will put the signal into both channels of the BFD.

    Regards,
    Wayne A. Pflughaupt
     
  3. Stephen Dodds

    Stephen Dodds Second Unit

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    Those are remarkably good results. Did you measure at the seated position?

    Steve
     
  4. Richard_M

    Richard_M Second Unit

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    Steve,

    Yes I did test at the seated position. BTW it took some filtering with the bfd to get these results.

    Wayne,

    Thanks for replying, this is effectively what I did to get these results, the problem is these results do not include the main speakers, and or xover of the receiver. At the moment I do not know what peaks or cancellations I will get once all the speakers are in the equation.

    Richard
     
  5. Wayne A. Pflughaupt

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    Richard,

    You can expect to see phase-related changes to your readings once the subs are connected to the system and the mains are added. However, often these can be addressed by further equalizing.

    Regards,
    Wayne A. Pflughaupt
     

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