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If we both charged we'd both be rich - and I could afford an equalizer and you could afford another sub!

I was mistaken to assume that you were using two subs, so thanks for correcting me on that.

I misunderstood what you were saying about bass transients. You are correct that the impact harmonics are not reproduced by the subwoofer. But if the deep bass is indeed non-directional as you have previously stated, then the deep bass does not need to be reproduced from the same physical location as the upper frequencies.

With your single subwoofer closer to one speaker than the other, you are doing exactly what you just objected to - namely, not reproducing the deep bass from the same location as the upper frequencies. And it works fine because the deep bass doesn't need to be reproduced from the same location as the upper frequencies.

You misunderstood what I was saying about Griesinger's 90 degree out-of-phase technique, rather than repeat myself I'll suggest you take another look at what I wrote.

The 4.8 dB you mention regarding dipoles is related to the directivity index, and not modal excitation characteristics. 100% of the reflected energy ends up bouncing around the room, whether the source is a monopole or a dipole. Monopoles and dipoles excite the room modes differently but dipoles do not excite fewer room modes. Dipoles do have a smoother in-room bass characteristic (James M. Kates, "Dipole Loudspeaker Response In Listening Rooms"). So do scattered multiple subwoofers, for the reasons given in my previous post.

If you are happiest with a single equalized subwoofer, that's fine. I am suggesting an alternative that will offer a significant improvement throughout the room, not just in one place.

Duke



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