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That is a nasty load.
Also if the output impedance of your amp is on the high side, say several ohms, one will create a bastardized form of equalization that's dependent upon the speaker's impedance curve. Some manufacturers play this game very carefully and design amp with what they call near zero or minimal local or global feedback. Distortion, usually even order harmonics, rise a bit to give a perceptible glow to the sound and the equalization can result in selectively boosting certain areas of the frequency response curves. However, if distortion is kept to inaudible levels and one follows the approach of low impedance into high impedance down the line, and further the FR of the amp is linear, the audible differences under controlled testing would be supremely difficult to ascertain with a large degree of confidence.
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