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RE: Why bi-amp Mags?

On the specs page of the owners manuals for both my T-IV and T-IVa, the low pass is specified as 3rd order Butterworth (18dB/octave) at 250Hz. The high pass for the m/t panels is 1st order (6dB) at 500Hz for the T-IV, and 2nd order (12dB) at 400Hz for the T-IVa. Are my manuals incorrect, or is the MUG schematic?


Edits: 08/07/17 08/07/17 08/07/17 08/07/17 08/07/17
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